CYLINK CORP /CA/
SC 13D, 1997-09-18
COMPUTER PERIPHERAL EQUIPMENT, NEC
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                                         OMB Number: 3235-0145
                                         Expires: October 31, 1997
                                         Estimated average burden hours per
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934

                              (Amendment No. ____)*


                               Cylink Corporation
                     ---------------------------------------
                                (Name of Issuer)

                     Common Stock, $0.01 Par Value Per Share
                     ---------------------------------------
                         (Title of Class of Securities)

                                    232565101
                     ---------------------------------------
                                 (CUSIP Number)

                                    Ze'ev May
                                  Gilony & May
                   14 Spinoza Street, Tel Aviv, 64384, Israel
                                 972-3-522-1417
           -----------------------------------------------------------
           (Name, Address and Telephone Number of Person Authorized to
                       Receive Notices and Communications)

                                September 8, 1997
           -----------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box |_|.

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

* The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934, as amended (the "Exchange Act") or otherwise subject to the liabilities of
that section of the Exchange Act but shall be subject to all other provisions of
the Exchange Act.

CUSIP No. 232565101


                                                              Page 1 of 26 Pages

<PAGE>


CUSIP No. 232565101


1        NAME OF REPORTING PERSON

         Yossi Tulpan

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

         N/A

- --------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

         (a) |_|                    (b) |X|

- --------------------------------------------------------------------------------
3        SEC USE ONLY



- --------------------------------------------------------------------------------
4        SOURCE OF FUNDS

         OO


- --------------------------------------------------------------------------------
5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
         ITEMS 2(d) OR 2(e) |_|


- --------------------------------------------------------------------------------
6        CITIZENSHIP OR PLACE OF ORGANIZATION

         State of Israel


- --------------------------------------------------------------------------------
NUMBER OF                    7         SOLE VOTING POWER
SHARES                                 814,436
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON

                             8         SHARED VOTING POWER
                                       -0-

                             9         SOLE DISPOSITIVE POWER
                                       -0-

                             10        SHARED DISPOSITIVE POWER 2,593,169 -- See
                                       footnote  1 to this  cover  page  and see
                                       Item 5 of this Schedule 13D


- --------------------------------------------------------------------------------


                                                              Page 2 of 26 Pages

<PAGE>


CUSIP No. 232565101


- --------------------------------------------------------------------------------

         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
         2,593,169 shares -- See footnote 1 to this cover page and see Item 5 of
         this Schedule 13D



- --------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
12                                                                    [ ]



- --------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13

      Approximately 9.06% -- See footnote 1 to this cover page and see Item 5 of
      this Schedule 13D



- --------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
       IN


- --------------------------------------------------------------------------------
1/       Neither the filing of this  Schedule 13D nor any of its contents  shall
         be deemed to constitute an admission by the reporting person that he is
         the  beneficial   owner  of  any  shares  of  Common  Stock  of  Cylink
         Corporation  (other  than the shares of Common  Stock  with  respect to
         which such  reporting  person has sole voting  power),  or that he is a
         member of a group with any other  reporting  person,  for  purposes  of
         Section 13(d) of the  Securities  Exchange Act of 1934, as amended,  or
         for any other purpose, and such beneficial ownership, and membership in
         a group, is expressly disclaimed.




                                                              Page 3 of 26 Pages

<PAGE>


CUSIP No. 232565101


1        NAME OF REPORTING PERSON

         Amos Fiat

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

         N/A


- --------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

         (a) |_|                    (b) |X|


- --------------------------------------------------------------------------------
3        SEC USE ONLY



- --------------------------------------------------------------------------------
4        SOURCE OF FUNDS

         OO


- --------------------------------------------------------------------------------
5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
         ITEMS 2(d) OR 2(e) |_|


- --------------------------------------------------------------------------------
6        CITIZENSHIP OR PLACE OF ORGANIZATION

         State of Israel


- --------------------------------------------------------------------------------
NUMBER OF                    7         SOLE VOTING POWER
SHARES                                 814,436
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON

                             8         SHARED VOTING POWER
                                       -0-

                             9         SOLE DISPOSITIVE POWER
                                       -0-

                             10        SHARED DISPOSITIVE POWER 2,593,169 -- See
                                       footnote  1 to this  cover  page  and see
                                       Item 5 of this Schedule 13D

- --------------------------------------------------------------------------------



                                                              Page 4 of 26 Pages

<PAGE>


CUSIP No. 232565101



- --------------------------------------------------------------------------------
         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
         2,593,169 shares -- See footnote 1 to this cover page and see Item 5 of
         this Schedule 13D



- --------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
12                                                                    [ ]



- --------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13

      Approximately 9.06% -- See footnote 1 to this cover page and see Item 5 of
      this Schedule 13D



- --------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
       IN


- --------------------------------------------------------------------------------
1/       Neither the filing of this  Schedule 13D nor any of its contents  shall
         be deemed to constitute an admission by the reporting person that he is
         the  beneficial   owner  of  any  shares  of  Common  Stock  of  Cylink
         Corporation  (other  than the shares of Common  Stock  with  respect to
         which such  reporting  person has sole voting  power),  or that he is a
         member of a group with any other  reporting  person,  for  purposes  of
         Section 13(d) of the  Securities  Exchange Act of 1934, as amended,  or
         for any other purpose, and such beneficial ownership, and membership in
         a group, is expressly disclaimed.

- --------------------------------------------------------------------------------



                                                              Page 5 of 26 Pages

<PAGE>


CUSIP No. 232565101


1        NAME OF REPORTING PERSON

         Yossi Cohen

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

         N/A


- --------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

         (a) |_|                    (b) |X|


- --------------------------------------------------------------------------------
3        SEC USE ONLY



- --------------------------------------------------------------------------------
4        SOURCE OF FUNDS

         OO


- --------------------------------------------------------------------------------
5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
         ITEMS 2(d) OR 2(e) |_|


- --------------------------------------------------------------------------------
6        CITIZENSHIP OR PLACE OF ORGANIZATION

         State of Israel


- --------------------------------------------------------------------------------
NUMBER OF                    7         SOLE VOTING POWER
SHARES                                 268,055
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON

                             8         SHARED VOTING POWER
                                       -0-

                             9         SOLE DISPOSITIVE POWER
                                       -0-

                             10        SHARED DISPOSITIVE POWER 2,593,169 -- See
                                       footnote  1 to this  cover  page  and see
                                       Item 5 of this Schedule 13D

- --------------------------------------------------------------------------------



                                                              Page 6 of 26 Pages

<PAGE>


CUSIP No. 232565101



- --------------------------------------------------------------------------------
         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
         2,593,169 shares -- See footnote 1 to this cover page and see Item 5 of
         this Schedule 13D



- --------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
12                                                                    [ ]



- --------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13

      Approximately 9.06% -- See footnote 1 to this cover page and see Item 5 of
      this Schedule 13D



- --------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
       IN


- --------------------------------------------------------------------------------
1/       Neither the filing of this  Schedule 13D nor any of its contents  shall
         be deemed to constitute an admission by the reporting person that he is
         the  beneficial   owner  of  any  shares  of  Common  Stock  of  Cylink
         Corporation  (other  than the shares of Common  Stock  with  respect to
         which such  reporting  person has sole voting  power),  or that he is a
         member of a group with any other  reporting  person,  for  purposes  of
         Section 13(d) of the  Securities  Exchange Act of 1934, as amended,  or
         for any other purpose, and such beneficial ownership, and membership in
         a group, is expressly disclaimed.


- --------------------------------------------------------------------------------


                                                              Page 7 of 26 Pages

<PAGE>


CUSIP No. 232565101


1        NAME OF REPORTING PERSON

         Koor Capital Markets

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

         N/A


- --------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

         (a) |_|                    (b) |X|


- --------------------------------------------------------------------------------
3        SEC USE ONLY



- --------------------------------------------------------------------------------
4        SOURCE OF FUNDS

         OO


- --------------------------------------------------------------------------------
5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
         ITEMS 2(d) OR 2(e) |_|


- --------------------------------------------------------------------------------
6        CITIZENSHIP OR PLACE OF ORGANIZATION

         State of Israel


- --------------------------------------------------------------------------------
NUMBER OF                    7         SOLE VOTING POWER
SHARES                                 194,513
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON

                             8         SHARED VOTING POWER
                                       -0-

                             9         SOLE DISPOSITIVE POWER
                                       -0-

                             10        SHARED DISPOSITIVE POWER 2,593,169 -- See
                                       footnote  1 to this  cover  page  and see
                                       Item 5 of this Schedule 13D

- --------------------------------------------------------------------------------



                                                              Page 8 of 26 Pages

<PAGE>


CUSIP No. 232565101



- --------------------------------------------------------------------------------
         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
         2,593,169 shares -- See footnote 1 to this cover page and see Item 5 of
         this Schedule 13D



- --------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
12                                                                    [ ]



- --------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13

      Approximately 9.06% -- See footnote 1 to this cover page and see Item 5 of
      this Schedule 13D



- --------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
       CO


- --------------------------------------------------------------------------------
1/       Neither the filing of this  Schedule 13D nor any of its contents  shall
         be deemed to constitute an admission by the reporting person that it is
         the  beneficial   owner  of  any  shares  of  Common  Stock  of  Cylink
         Corporation  (other  than the shares of Common  Stock  with  respect to
         which such  reporting  person has sole voting  power),  or that it is a
         member of a group with any other  reporting  person,  for  purposes  of
         Section 13(d) of the  Securities  Exchange Act of 1934, as amended,  or
         for any other purpose, and such beneficial ownership, and membership in
         a group, is expressly disclaimed.



                                                              Page 9 of 26 Pages

<PAGE>


CUSIP No. 232565101


1        NAME OF REPORTING PERSON

         Telrad Holdings Ltd.

         S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

         N/A


- --------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

         (a) |_|                    (b) |X|


- --------------------------------------------------------------------------------
3        SEC USE ONLY



- --------------------------------------------------------------------------------
4        SOURCE OF FUNDS

         OO


- --------------------------------------------------------------------------------
5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
         ITEMS 2(d) OR 2(e) |_|


- --------------------------------------------------------------------------------
6        CITIZENSHIP OR PLACE OF ORGANIZATION

         State of Israel


- --------------------------------------------------------------------------------
NUMBER OF                    7         SOLE VOTING POWER
SHARES                                 501,725
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON

                             8         SHARED VOTING POWER
                                       -0-

                             9         SOLE DISPOSITIVE POWER
                                       -0-

                             10        SHARED DISPOSITIVE POWER 2,593,169 -- See
                                       footnote  1 to this  cover  page  and see
                                       Item 5 of this Schedule 13D

- --------------------------------------------------------------------------------



                                                             Page 10 of 26 Pages

<PAGE>


CUSIP No. 232565101



- --------------------------------------------------------------------------------
         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11
         2,593,169 shares -- See footnote 1 to this cover page and see Item 5 of
         this Schedule 13D



- --------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES
12                                                                    [ ]



- --------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13

      Approximately 9.06% -- See footnote 1 to this cover page and see Item 5 of
      this Schedule 13D



- --------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
       CO


- --------------------------------------------------------------------------------
1/       Neither the filing of this  Schedule 13D nor any of its contents  shall
         be deemed to constitute an admission by the reporting person that it is
         the  beneficial   owner  of  any  shares  of  Common  Stock  of  Cylink
         Corporation  (other  than the shares of Common  Stock  with  respect to
         which such  reporting  person has sole voting  power),  or that it is a
         member of a group with any other  reporting  person,  for  purposes  of
         Section 13(d) of the  Securities  Exchange Act of 1934, as amended,  or
         for any other purpose, and such beneficial ownership, and membership in
         a group, is expressly disclaimed.



                                                             Page 11 of 26 Pages

<PAGE>


CUSIP No. 232565101

         This Schedule 13D is being filed in connection  with the acquisition by
A.R. Data Security Ltd., a limited liability company organized under the laws of
the State of Israel  ("ARDS"),  of 2,593,169  shares of common  stock,  $.01 par
value per share, of Cylink Corporation,  a California corporation ("Cylink"). At
the time at which ARDS acquired such shares of common stock of Cylink,  ARDS was
(and as of the date of the filing of this Schedule  13D,  ARDS  continues to be)
undergoing a voluntary liquidation.  As a result of the liquidation of ARDS, the
shareholders  of ARDS (rather than ARDS itself) have been vested with all rights
with respect to the shares of common stock of Cylink acquired by ARDS (including
the  right to vote and the right to  dispose  of such  shares),  and ARDS has no
rights with respect to any of such shares.  Consequently,  the  shareholders  of
ARDS (rather than ARDS  itself) are the  reporting  persons for purposes of this
Schedule 13D.

         As of September 7, 1997, ARDS and its wholly-owned  subsidiary,  Algart
Holdings Ltd., a limited liability company organized under the laws of the State
of  Israel  ("Holdings"),  owned  all  of the  outstanding  ordinary  shares  of
Algorithmic  Research Ltd., a limited liability company organized under the laws
of the  State of  Israel  ("ARL").  Cylink,  ARDS and ARL  entered  into a Stock
Purchase Agreement dated as of September 7, 1997 (the "Purchase  Agreement"),  a
copy of which is attached hereto as Exhibit 99.1 and incorporated  herein in its
entirety  by  reference,  pursuant  to which  ARDS  transferred  to  Cylink,  on
September  8, 1997 (the  "Closing  Date"),  all of the  issued  and  outstanding
ordinary  shares  of ARL held by ARDS,  and all of the  issued  and  outstanding
ordinary shares of Holdings, in exchange for (i) $40,686,972 in cash, and (ii) a
total of 2,593,169  newly issued shares of the common stock,  $.01 par value per
share,  of Cylink.  (The common  stock,  $.01 par value per share,  of Cylink is
referred to herein as "Cylink Common Stock," and the 2,593,169  shares of Cylink
Common Stock issued pursuant to the Purchase Agreement are referred to herein as
the  "Transaction  Shares.") In addition,  in connection  with the  transactions
consummated pursuant to the Purchase Agreement:

                  (a) Cylink,  ARDS,  Hambrecht & Quest LLC (the "Escrow Agent")
         and Adv.  Ze'ev May (the  "Seller's  Representative")  entered  into an
         Escrow   Agreement   dated  as  of   September  8,  1997  (the  "Escrow
         Agreement"),  a copy of which is  attached  hereto as Exhibit  99.2 and
         incorporated  herein in its  entirety by  reference,  pursuant to which
         1,272,300 of the  Transaction  Shares (the  "Escrow  Shares") are being
         held in escrow by the  Escrow  Agent for the  purpose of  securing  the
         indemnification  obligations  of ARDS under  Article V of the  Purchase
         Agreement;

                  (b)  Cylink,  ARDS and each of the  shareholders  of ARDS (the
         "Parent  Shareholders")  entered into a Seller's  Agreement dated as of
         September  8,  1997  (the  "Seller's  Agreement"),  a copy of  which is
         attached hereto as Exhibit 99.3 and incorporated herein in its entirety
         by reference,  containing  certain  restrictions  and other  provisions
         applicable to the disposition of the Transaction Shares; and

                  (c) The Parent Shareholders entered into an Internal Agreement
         dated as of September 7, 1997 (the  "Internal  Agreement"),  an English
         translation   of  which  is  attached   hereto  as  Exhibit   99.4  and
         incorporated  herein in its entirety by reference,  containing  certain
         provisions  relating to the  disposition  and voting of the Transaction
         Shares.

         Each  summary of or reference  to the  Purchase  Agreement,  the Escrow
Agreement,  the Seller's Agreement or the Internal  Agreement,  or any provision
thereof,  contained  in this  Schedule 13D is qualified by reference to the copy
(or translation) of such agreement attached as an exhibit hereto.

         Any  information  contained in this  Schedule  13D as to any  reporting
person has been provided by such reporting  person,  and no reporting  person is
responsible for any  information  contained in this Schedule 13D as to any other
reporting person.


                                                             Page 12 of 26 Pages

<PAGE>


CUSIP No. 232565101

ITEM 1.           SECURITY AND ISSUER

         This  Schedule 13D relates to the Cylink  Common  Stock.  The principal
executive  offices  of Cylink  are  located  at 910  Hermosa  Court,  Sunnyvale,
California 94086.

ITEM 2.           IDENTITY AND BACKGROUND

         (a) The names of the people filing this Schedule 13D are: Yossi Tulpan,
Amos Fiat,  Yossi  Cohen,  Koor Capital  Markets,  a limited  liability  company
organized  under the laws of the State of Israel  ("Koor"),  and Telrad Holdings
Ltd.,  a  limited  liability  company  organized  under the laws of the State of
Israel  ("Telrad").  Yossi Tulpan,  Amos Fiat and Yossi Cohen are referred to in
this Schedule 13D as the "Individual Parent Shareholders."

         Koor is in the business of providing  financial services and is engaged
in underwriting,  portfolio and provident fund management,  foreign exchange and
trading in futures.

         Telrad  is in the  business  of  investing  in  securities  of  private
companies.

         (b) The business address of each of the Individual Parent  Shareholders
is c/o Algorithmic Research Ltd., 15 Gush Etzion Street,  Givat Shmuel,  Israel.
The address of the  principal  office and  principal  business  of Koor  Capital
Markets is 19  Rothschild  Blvd.,  Tel Aviv  66881,  Israel.  The address of the
principal office and principal business of Telrad Holdings Ltd. is 19 Rothschild
Blvd., Tel Aviv 66881, Israel.

         (c) Each of the Individual Parent Shareholders is currently employed in
a senior  capacity at ARL.  Set forth in Schedule I to this  Schedule 13D is the
name and present principal  occupation or employment of each of Koor's executive
officers  and  directors  and the name,  principal  business  and address of any
corporation or other  organization  in which such  employment is conducted.  Set
forth in Schedule  II to this  Schedule  13D is the name and  present  principal
occupation or employment  of each of Telrad's  executive  officers and directors
and the  name,  principal  business  and  address  of any  corporation  or other
organization in which such employment is conducted.

         (d) During the past five years: (i) none of the Parent Shareholders has
been convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors);  (ii) to Koor's knowledge,  no person named in Schedule I to this
Schedule 13D has been  convicted  in a criminal  proceeding  (excluding  traffic
violations or similar misdemeanors);  and (iii) to Telrad's knowledge, no person
named in  Schedule  II to this  Schedule  13D has been  convicted  in a criminal
proceeding (excluding traffic violations or similar misdemeanors).

         (e) During the past five years: (i) none of the Parent Shareholders was
a party to a civil proceeding of a judicial or administrative  body of competent
jurisdiction  as a result of which such  person was or is subject to a judgment,
decree or final order enjoining future violations of or prohibiting or mandating
activity  subject to federal or state  securities  laws or finding any violation
with respect to such laws; (ii) to Koor's knowledge, no person named in Schedule
I to this  Schedule  13D was a party  to a civil  proceeding  of a  judicial  or
administrative  body of competent  jurisdiction as a result of which such person
was or is  subject  to a  judgment,  decree  or  final  order  enjoining  future
violations of or prohibiting or mandating  activity  subject to federal or state
securities laws or finding any violation with respect to such laws; and (iii) to
Telrad's  knowledge,  no person named in Schedule II to this  Schedule 13D was a
party to a civil proceeding of a judicial or


                                                             Page 13 of 26 Pages

<PAGE>


CUSIP No. 232565101

administrative  body of competent  jurisdiction as a result of which such person
was or is  subject  to a  judgment,  decree  or  final  order  enjoining  future
violations of or prohibiting or mandating  activity  subject to federal or state
securities laws or finding any violation with respect to such laws.

         (f)  Each  of  the  Individual  Parent  Shareholders  and  each  of the
directors  and  executive  officers  of Koor and Telrad  named in Schedule I and
Schedule II to this Schedule 13D is a citizen of the State of Israel.

ITEM 3.           SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

         As  stated  above,  in  exchange  for  the  Transaction   Shares,  ARDS
transferred to Cylink pursuant to the Purchase Agreement,  all of the issued and
outstanding  ordinary  shares  of ARL held by ARDS,  and all of the  issued  and
outstanding ordinary shares of Holdings.

ITEM 4.           PURPOSE OF TRANSACTION

         (a) Except as described  below,  the reporting  persons have no current
plans which relate to or might result in the  acquisition  or  disposition  by a
reporting person of additional securities of Cylink.

         Subject to the applicable  provisions of the Seller's Agreement and the
Internal  Agreement,  based upon a reporting person's  evaluation of a number of
factors (including,  among other factors,  the business and prospects of Cylink,
the economy in the United States and in Israel and general  market  conditions),
such  reporting  person may from time to time  purchase  or sell  securities  of
Cylink in the open  market and  otherwise.  Pursuant  to the terms of the Escrow
Agreement,  the Seller's  Representative,  on behalf of the Parent Shareholders,
has the right to receive or direct the  distribution  of shares of Cylink Common
Stock from  escrow in the manner and under the  circumstances  described  in the
Escrow  Agreement.  It is contemplated  that sales of Transaction  Shares may be
made  from  time  to  time in  accordance  with  the  provisions  of the  Escrow
Agreement, the Seller's Agreement and the Internal Agreement.

         None of the  reporting  persons  currently  has any  current  plans  or
proposals  which  relate  to or would  result  in any of the  actions  listed in
paragraphs (b), (c), (e), (f), (g), (h), (i) or (j) of this Item 4.

         (d) Pursuant to (and subject to the  provisions  of) Section 4.9 of the
Purchase  Agreement,  Cylink has agreed: (i) to afford one representative of the
Parent  Shareholders the right as a non-voting  member of the Board of Directors
of Cylink to attend  meetings  of  Cylink's  Board of  Directors  and to receive
copies of materials distributed in connection with such Board meetings; and (ii)
commencing as of Cylink's 1998 annual meeting of shareholders, to use reasonable
efforts to cause a  representative  of the Parent  Shareholders to be elected to
Cylink's Board of Directors. The Internal Agreement contains provisions relating
to the selection by the Parent Shareholders of such a representative.

ITEM 5.           INTEREST IN SECURITIES OF THE ISSUER

         (a) - (b) This Item 5 contains  information  relating  to the number of
Transaction  Shares with  respect to which each  reporting  person has or may be
deemed to have sole or shared voting power and sole or shared dispositive power.
For the reasons  described below,  each Parent  Shareholder (i) may be deemed to
have sole voting power with respect to the Transaction Shares referred to in the
table  below,  and (ii) may be  deemed to have  shared  dispositive  power  with
respect to all of the Transaction Shares.



                                                             Page 14 of 26 Pages

<PAGE>


CUSIP No. 232565101

         Each  Parent  Shareholder  has sole  voting  power with  respect to all
Transaction Shares owned directly by such Parent Shareholder.  In addition,  for
purposes of this  Schedule 13D,  each Parent  Shareholder  may be deemed to have
sole voting power with respect to such Parent  Shareholder's  "Percentage Share"
of the Escrow Shares because: (i) pursuant to the terms of the Escrow Agreement,
the  Seller's  Representative  has the  right to direct  the vote of the  Escrow
Shares,  and (ii) pursuant to the terms of the Internal  Agreement,  each Parent
Shareholder has the exclusive right to instruct the Seller's  Representative  as
to how to vote  such  Parent  Shareholder's  "Percentage  Share"  of the  Escrow
Shares. The Percentage Share of each Parent Shareholder is as follows:

         Name of Parent Shareholder                    Percentage Share
         --------------------------                    ----------------

         Yossi Tulpan                                      31.407%

         Amos Fiat                                         31.407%

         Yossi Cohen                                       10.337%

         Koor Capital Markets                               7.501%

         Telrad Holdings Ltd.                              19.348%

         The Escrow Agreement, the Seller's Agreement and the Internal Agreement
contain  provisions  relating to the  disposition of  Transaction  Shares by the
Parent  Shareholders.  Because the Seller's Agreement and the Internal Agreement
might be deemed to give rise to an agreement by two or more Parent  Shareholders
to act  together  for the  purpose of holding or  disposing  of the  Transaction
Shares,  the Parent  Shareholders may be deemed (i) to have formed a "group" (as
contemplated by Rule 13d-5 under the Securities Exchange Act of 1934, as amended
(the "Exchange  Act")) with respect to the disposition of all of the Transaction
Shares for purposes of this Schedule 13D, (ii) to have shared  dispositive power
over all of the Transaction  Shares for purposes of this Schedule 13D, and (iii)
to be the  "beneficial  owner" (as defined in Rule 13d-3 under the Exchange Act)
of all of the Transaction Shares for purposes of this Schedule 13D.



                                                             Page 15 of 26 Pages

<PAGE>


CUSIP No. 232565101

<TABLE>

         The following  table sets forth the number of  Transaction  Shares with
respect to which each  Parent  Shareholder  has or may be deemed to have sole or
shared voting power and sole or shared dispositive power:

<CAPTION>

                              Sole              Shared                              Sole              Shared
                             Voting             Voting          Percent of       Dispositive         Dispositive       Percent of
         Name                 Power              Power           Class4/            Power              Power              Class
         ----               --------          ----------       ----------        -----------        --------------      -------
<S>                           <C>                   <C>               <C>                <C>          <C>                 <C>  
Yossi Tulpan1/                814,436              -0-                2.84%             -0-           2,593,169           9.06%

Amos Fiat2/                   814,436              -0-                2.84%             -0-           2,593,169           9.06%

Yossi Cohen3/                 268,055              -0-                0.93%             -0-           2,593,169           9.06%

Koor Capital                  194,513              -0-                0.68%             -0-           2,593,169           9.06%
Markets

Telrad                        501,725              -0-                1.75%             -0-           2,593,169           9.06%
Holdings Ltd.

<FN>

- ----------------------------

1/   In addition to the shares referred to in this table, pursuant to an amendment to an employment agreement between Mr. Tulpan and
     ARL, Mr. Tulpan was or will be granted  options to purchase  50,000  shares of Cylink  Common  Stock.  Such options vest over a
     period of five years, beginning one year from the date of grant.

2/   In addition to the shares referred to in this table,  pursuant to an amendment to an employment  agreement between Mr. Fiat and
     ARL, Mr. Fiat was or will be granted options to purchase 50,000 shares of Cylink Common Stock.  Such options vest over a period
     of five years, beginning one year from the date of grant.

3/   In addition to the shares referred to in this table,  pursuant to an amendment to an employment agreement between Mr. Cohen and
     ARL, Mr. Cohen was or will be granted options to purchase 50,000 shares of Cylink Common Stock. Such options vest over a period
     of five years, beginning one year from the date of grant.

4/   Based on approximately  28,596,805 shares of Cylink Common Stock outstanding as of September 8, 1997 (including the Transaction
     Shares).
</FN>
</TABLE>

         Neither the filing of this  Schedule 13D nor any of its contents  shall
be deemed to constitute an admission by any reporting person that such reporting
person  is the  beneficial  owner  of any  shares  of  Common  Stock  of  Cylink
Corporation  (other than the shares of Common  Stock with  respect to which such
reporting  person has sole voting  power),  or that such  reporting  person is a
member of a group with any other reporting person, for purposes of Section 13(d)
of the Exchange Act, or for any other purpose,  and such  beneficial  ownership,
and membership in a group, is expressly disclaimed.



                                                             Page 16 of 26 Pages

<PAGE>


CUSIP No. 232565101


         To Koor's knowledge,  no shares of Cylink Common Stock are beneficially
owned by any of the  persons  named  in  Schedule  I to this  Schedule  13D.  To
Telrad's  knowledge,  no shares of Cylink Common Stock are beneficially owned by
any of the persons named in Schedule II to this Schedule 13D.

         Except as set forth  above:  (a) no  reporting  person has affected any
transaction  in  Cylink  Common  Stock  during  the past 60 days;  (b) to Koor's
knowledge,  no person named in Schedule I to this  Schedule 13D has affected any
transaction  in Cylink Common Stock during the past 60 days; and (c) to Telrad's
knowledge,  no person named in Schedule II to this Schedule 13D has affected any
transaction in Cylink Common Stock during the past 60 days.

         Reference  is made to the  disclosure  in Item 2 of this  Schedule  13D
regarding  applicable  information  for  the  persons  and  entities  who  share
dispositive power with respect to the Transaction Shares.

ITEM 6.           CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH
                  RESPECT TO SECURITIES OF THE ISSUER

         Other  than  as  described  above,  to  the  knowledge  of  the  Parent
Shareholders,   there  are  no  contracts,   arrangements,   understandings   or
relationships (legal or otherwise) among the persons named in Item 2 and between
such persons and any person with respect to any securities of Cylink,  including
but not limited to transfer or voting of any of the  securities,  finder's fees,
joint  ventures,  loan or  option  arrangements,  puts or calls,  guarantees  of
profits, division of profits or loss, or the giving or withholding of proxies.


                                                             Page 17 of 26 Pages

<PAGE>


CUSIP No. 232565101

<TABLE>

ITEM 7.           MATERIAL TO BE FILED AS EXHIBITS

- -------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
EXHIBIT NO.              DESCRIPTION
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>
99.1                     Stock Purchase Agreement dated as of September 7, 1997,
                         among Cylink  Corporation,  a  California  corporation,
                         A.R. Data Security  Ltd., a limited  liability  company
                         organized  under the laws of the State of  Israel,  and
                         Algorithmic  Research Ltd., a limited liability company
                         organized under the laws of the State of Israel
- -------------------------------------------------------------------------------------------------------------------------------
99.2                     Escrow Agreement dated as of September 8, 1997, among Cylink Corporation,
                         a California corporation,  A.R. Data Security Ltd., a limited liability company
                         organized under the laws of the State of Israel, Adv. Ze'ev May, and
                         Hambrecht & Quist LLC
- -------------------------------------------------------------------------------------------------------------------------------
99.3                     Seller's Agreement dated as of September 8, 1997, among Cylink
                         Corporation, a California corporation, A.R. Data Security Ltd., a limited
                         liability company organized under the laws of the State of Israel, Yossi
                         Tulpan, Yossi Cohen, Amos Fiat, Koor Capital Markets and Telrad Holdings
                         Ltd.
- -------------------------------------------------------------------------------------------------------------------------------
99.4                     Internal Agreement dated as of September 7, 1997, among Yossi Tulpan,
                         Amos Fiat, Yossi Cohen, Koor Capital Markets and Telrad Holdings Ltd.
                         (English translation of original document in Hebrew)
- -------------------------------------------------------------------------------------------------------------------------------
99.5                     Joint Filing Statement
- -------------------------------------------------------------------------------------------------------------------------------



                                                                                                                 Page 18 of 26 Pages
</TABLE>

<PAGE>


CUSIP No. 232565101


                                    SIGNATURE


         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


Date:  September 17, 1997


                                                  By:/s/ Yossi Tulpan
                                                     ---------------------------
                                                          Yossi Tulpan



                                                             Page 19 of 26 Pages

<PAGE>


CUSIP No. 232565101


                                    SIGNATURE


         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


Date:  September 17, 1997


                                                  By:/s/ Amos Fiat
                                                     ---------------------------
                                                         Amos Fiat



                                                             Page 20 of 26 Pages

<PAGE>


CUSIP No. 232565101


                                    SIGNATURE


         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


Date:  September 17, 1997


                                                  By:/s/ Yossi Cohen
                                                     ---------------------------
                                                         Yossi Cohen



                                                             Page 21 of 26 Pages

<PAGE>


CUSIP No. 232565101


                                    SIGNATURE


         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


Date:  September 17, 1997                    Koor Capital Markets


                                             By:/s/ Itzhak Chalamish
                                                --------------------------------
                                                     Itzhak Chalamish, President


                                             By:/s/ Yair Na'aman
                                                --------------------------------
                                                     Yair Na'aman, Director




                                                             Page 22 of 26 Pages

<PAGE>


CUSIP No. 232565101


                                    SIGNATURE


         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


Date:  September 17, 1997                         Telrad Holdings Ltd.


                                                  By:/s/ Oded Korithsoner
                                                     ---------------------------
                                                          Oded Korithsoner,
                                                          Managing Director

                                                       




                                                             Page 23 of 26 Pages

<PAGE>


CUSIP No. 232565101

<TABLE>


                                                             SCHEDULE I

                                              EXECUTIVE OFFICERS AND DIRECTORS OF KOOR

- ----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
NAME                                        Principal Occupation                     ADDRESS OF BUSINESS OF PRINCIPAL
                                               or Employment                             OCCUPATION OR EMPLOYMENT
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                  <C>                                  <C>
Oded Korithshoner                    Vice President Finance --            PO Box 50
                                     Telrad Ltd.                          Lod
                                                                          
- ----------------------------------------------------------------------------------------------------------------------------------
Eytan Sheshinksi                     Professor of Economics               Jerusalem University
                                     and Statistics --                    Jerusalem
                                     Jerusalem University                 
- ----------------------------------------------------------------------------------------------------------------------------------
Yehuda Milo                          Deputy President & CFO --            4 Kaufman Street
                                     Koor Industries                      Tel Aviv, Israel               
                                                                          
- ----------------------------------------------------------------------------------------------------------------------------------
Yair Na'aman                         Head of Finance Division --          4 Kaufman Street          
                                     Koor Industries                      Tel Aviv, Israel          
                                                                           
- ----------------------------------------------------------------------------------------------------------------------------------
Itzhak Chalamish                     President -- Koor Capital            19 Rothschild Blvd.   
                                     Markets                              Tel Aviv 66881, Israel
                                                                          
- ----------------------------------------------------------------------------------------------------------------------------------
Yossef Ben-Shalom                    Vice President & CFO                 29 Hamerkava
                                     Tadiran Ltd.                         Holon, Israel
                                                                          
- ----------------------------------------------------------------------------------------------------------------------------------
Yosi Bahir                           Head of Securities &                 35 Achad Ho'am Street      
                                     Investment Division --               Tel Aviv, Israel       
                                     The Maritime Bank of Israel Ltd.                           
- ----------------------------------------------------------------------------------------------------------------------------------
Arieh Gans                           Vice President Corporate             4 Kaufman Street        
                                     Controller --                        Tel Aviv, Israel        
                                     Koor Industries                               
- ----------------------------------------------------------------------------------------------------------------------------------
David Levinson                       Managing Director & CEO --           35 Achad Ho'am Street             
                                     The Maritime Bank of                 Tel Aviv, Israel                
                                     Israel, Ltd.                                    
- ----------------------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------------

</TABLE>


                                                             Page 24 of 26 Pages

<PAGE>


CUSIP No. 232565101

<TABLE>
                                                             SCHEDULE II

                                             EXECUTIVE OFFICERS AND DIRECTORS OF TELRAD

- -----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
NAME                                        PRINCIPAL OCCUPATION                      ADDRESS OF BUSINESS OF PRINCIPAL
                                                OR EMPLOYMENT                             OCCUPATION OR EMPLOYMENT
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                 <C>                                   <C>
Oded Korithshoner                   Vice President Finance --             19 Rothschild Blvd.
                                    Telrad Ltd.                           Tel Aviv, Israel
- -----------------------------------------------------------------------------------------------------------------------------------
Itzak Chalamish                     President -- Koor Capital             19 Rothschild Blvd.
                                    Markets                               Tel Aviv, Israel
- -----------------------------------------------------------------------------------------------------------------------------------
Moti Zvi                            Chairman -- Telrad                    19 Rothschild Blvd.
                                                                          Tel Aviv, Israel   
- -----------------------------------------------------------------------------------------------------------------------------------
Itzak Oritzki                                                             46 Wolfson
                                                                          Tel Aviv, Israel
- -----------------------------------------------------------------------------------------------------------------------------------
Galia Albin                                                               39 Hazorea
                                                                          Kfar-Shmariha
- -----------------------------------------------------------------------------------------------------------------------------------
Moshe Landao                                                              TMI, 18 Shimkin
                                                                          Haifa, Israel
- -----------------------------------------------------------------------------------------------------------------------------------
Sami Katzav                                                               199 Haroeh
                                                                          Rumat Gan
- -----------------------------------------------------------------------------------------------------------------------------------
Shimon Shalom                                                             13 Tfotzat Israel
                                                                          Givataim
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>




                                                             Page 25 of 26 Pages

<PAGE>


CUSIP No. 232565101

<TABLE>

                                                            EXHIBIT INDEX

- -------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
EXHIBIT NO.              DESCRIPTION
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       
99.1                     Stock Purchase Agreement dated as of September 7, 1997,
                         among Cylink  Corporation,  a  California  corporation,
                         A.R. Data Security  Ltd., a limited  liability  company
                         organized  under the laws of the State of  Israel,  and
                         Algorithmic  Research Ltd., a limited liability company
                         organized under the laws of the State of Israel
- -------------------------------------------------------------------------------------------------------------------------------
99.2                     Escrow Agreement dated as of September 8, 1997, among Cylink Corporation,
                         a California corporation,  A.R. Data Security Ltd., a limited liability company
                         organized under the laws of the State of Israel, Adv. Ze'ev May, and
                         Hambrecht & Quist LLC
- -------------------------------------------------------------------------------------------------------------------------------
99.3                     Seller's Agreement dated as of September 8, 1997, among Cylink
                         Corporation, a California corporation, A.R. Data Security Ltd., a limited
                         liability company organized under the laws of the State of Israel, Yossi
                         Tulpan, Yossi Cohen, Amos Fiat, Koor Capital Markets and Telrad Holdings
                         Ltd.
- -------------------------------------------------------------------------------------------------------------------------------
99.4                     Internal Agreement dated as of September 7, 1997, among Yossi Tulpan,
                         Amos Fiat, Yossi Cohen, Koor Capital Markets and Telrad Holdings Ltd.
                         (English translation of original document in Hebrew)
- -------------------------------------------------------------------------------------------------------------------------------
99.5                     Joint Filing Statement
- -------------------------------------------------------------------------------------------------------------------------------


</TABLE>

                                                             Page 26 of 26 Pages


                            STOCK PURCHASE AGREEMENT



         THIS STOCK PURCHASE AGREEMENT  ("Agreement") is made as of September 7,
1997  by  and  among  Cylink   Corporation,   a  California   corporation   (the
"Purchaser"),  Algorithmic  Research Ltd., a limited liability company organized
and  existing  under the laws of the State of Israel (the  "Company"),  and A.R.
Data Security Ltd., a limited liability company organized and existing under the
laws of the State of Israel (the "Seller").


                                    RECITALS


A. The Seller and Algart Holdings Ltd., a limited  liability  company  organized
and existing under the laws of the State of Israel and a wholly owned subsidiary
of the Seller ("Holdings"), are the sole shareholders of the Company.


B. The Seller  desires to sell and the Purchaser  desires to purchase (i) all of
the issued and  outstanding  shares of the Company that are owned by the Seller,
and (ii) all of the issued and  outstanding  shares of Holdings,  in  accordance
with the  terms  and  conditions  set  forth in this  Agreement,  so that,  upon
consummation  of the  transactions  herein  contemplated,  the  Purchaser  shall
directly, or indirectly through Holdings,  own all of the issued and outstanding
shares of the Company.



                                    AGREEMENT

         In consideration of the agreements,  provisions and covenants set forth
below, the Purchaser, the Company and the Seller hereby agree as follows:

                                   ARTICLE I

                                PURCHASE AND SALE


     1.1.  Purchase and Sale of Stock.  Subject to the terms and  conditions set
forth below,  on the Closing Date (as defined  below),  the Seller shall sell to
the  Purchaser,  and the Purchaser  shall  purchase from the Seller:  (a) 81,749
ordinary shares of the Company,  NIS 0.10 nominal value per share,  representing
all of the  ordinary  shares of the Company  that are owned by the Seller  (said
81,749  ordinary  shares  of  the  Company  being  referred  to  herein  as  the
"Transferred Company Shares"),  and (b) 81,749 ordinary shares of Holdings,  NIS
0.10  nominal  value per share,  representing  all of the  outstanding  ordinary
shares of Holdings (the "Holdings Shares").


     1.2. Purchase Price.


          (a) The  aggregate  consideration  payable  by the  Purchaser  for the
Transferred  Company  Shares and the Holdings  Shares shall  consist of (i) U.S.
$40,686,972 in cash, and (ii) 2,593,169 newly issued shares of the common stock,
$.01 par value per share, of the Purchaser

                                       1
<PAGE>

(the  "Purchaser  Common  Stock"),  as adjusted as appropriate for stock splits,
stock dividends and other changes to Purchaser  Common Stock effected during the
period from the date hereof through the Closing Date.

          (b) Any transfer taxes,  stamp duties or other similar taxes or duties
incurred  by the  Seller,  Holdings  or the  Purchaser  in  connection  with the
transfer  of the  Transferred  Company  Shares  or the  Holdings  Shares  to the
Purchaser  shall be borne  and paid one half by the  Seller  and one half by the
Purchaser.


     1.3.     Exemption from Registration and Qualification.

          (a) The shares of Purchaser  Common  Stock to be issued in  connection
with this Agreement will be exempt from  registration  under Regulation S of the
Securities  Act of 1933,  as amended  (the  "Securities  Act"),  and exempt from
qualification under the California Corporations Code.


          (b) Certificates  representing  those shares of Purchaser Common Stock
to be  issued  to the  Seller  pursuant  to this  Agreement  will  bear  legends
describing certain of the applicable  restrictions on transferability  set forth
in Regulation S of the  Securities  Act and related  stop-transfer  instructions
will be placed on such shares of Purchaser Common Stock by Purchaser or its duly
appointed   transfer  agent  and  registrar.   The  Purchaser  agrees  that  the
restrictive  Regulation  S legend and  stop-transfer  instructions  referred  to
herein will be removed upon the request of the Seller or the  respective  Parent
Shareholders (as defined below) at the end of the applicable  restricted  period
as set forth in Regulation S (which is forty (40) days from the Closing Date).

     1.4.     Closing.

          (a) Unless  this  Agreement  shall  theretofore  have been  terminated
pursuant  to the  provisions  of  Article  X  hereof,  subject  to the terms and
conditions set forth herein,  the closing of the  transactions  contemplated  by
this Agreement (the "Closing")  shall take place in Tel Aviv,  Israel,  at 12:00
p.m.  local time on September  8, 1997 or at such other time,  date and place as
the parties may mutually  agree in writing (the date on which the Closing  takes
place being referred to herein as the "Closing Date").

          (b) At the Closing:  (i) the Seller shall deliver to the Purchaser the
certificates  (if any)  representing  the  Transferred  Company  Shares  and the
Holdings  Shares,  properly  endorsed in favor of the  Purchaser for transfer or
accompanied by a duly executed share transfer deed; and (ii) the Purchaser shall
(A) pay to the Seller the cash amount referred to in Section  1.2(a)(i)  hereof,
by wire transfer in immediately available (U.S. dollar) funds, to a bank account
designated  by the  Seller,  (B) issue and  deliver to the Seller a  certificate
representing  1,320,869  shares of Purchaser  Common Stock, and (C) issue in the
name of and deliver to Hambrecht & Quist LLC (the "Escrow  Agent") a certificate
representing  1,272,300 shares of Purchaser Common Stock (the "Escrow  Shares"),
to be held in accordance  with that certain Escrow  Agreement to be entered into
at the  Closing as  contemplated  by Sections  7.5 and 8.4 hereof  (the  "Escrow
Agreement").  In  addition,  all  other  actions  shall be taken  and all  other
documents shall be delivered that are necessary to consummate

                                       2
<PAGE>

the  transactions  contemplated  by this Agreement  (other than such actions and
documents  as are to be taken or  delivered  at another  date,  as  specifically
provided in this Agreement).

                                       3
<PAGE>


                                   ARTICLE II


                  REPRESENTATIONS AND WARRANTIES OF THE SELLER

          The Seller hereby represents and warrants to the Purchaser,  except as
otherwise set forth in the Disclosure  Schedule being furnished by the Seller to
the Purchaser  simultaneously  with the execution and delivery of this Agreement
(the "Company  Schedule"),  or as disclosed or otherwise described in any of the
documents  listed or set forth in the Company  Schedule  or this  Article II, as
follows:

     2.1.  Title to  Ordinary  Shares.  The Seller is the record and  beneficial
owner of the Transferred  Company Shares and the Holdings Shares, and the Seller
holds title to the  Transferred  Company Shares and the Holdings Shares free and
clear  of  all  liens,  pledges,  charges,  encumbrances,   security  interests,
restrictive    agreements   or   assessments   (other   than   restrictions   on
transferability  generally  imposed on securities  under  applicable  securities
laws).

     2.2.  Organization  of the  Company and  Holdings.  Each of the Company and
Holdings is a limited  liability  private  company  duly  organized  and validly
existing  under the laws of the State of Israel and has full power and authority
to carry on its business as now  conducted,  and to own its assets.  Each of the
Company and Holdings is duly  qualified  to do business and is in good  standing
(with  respect  to   jurisdictions   which   recognize   such  concept)  in  the
jurisdictions set forth in Schedule 2.2 of the Company  Schedule,  which are the
only  jurisdictions  in which the  Company or  Holdings,  as the case may be, is
required  to be  qualified  in  order  to  carry  on its  business,  and is duly
authorized,  and licensed under all laws,  regulations,  ordinances or orders of
public authorities,  or otherwise, to carry on its business in the places and in
the manner presently  conducted,  except for  qualifications,  authorizations or
licenses for which the failure to obtain, if required, would not have a Material
Adverse  Effect on the Company.  Each of the Company and Holdings has heretofore
made  available to the Purchaser  true and complete  copies of its Memorandum of
Association  and its Articles of  Association  registered  with the Registrar of
Companies,  as in effect on the date  hereof.  The  minute  books of each of the
Company and Holdings contain  substantially  accurate records of all resolutions
adopted  and  other  actions  taken by the  Company's  Board of  Directors,  all
committees of its Board of Directors,  and its shareholders from the date of its
incorporation to the date of this Agreement.

     2.3.  Nonviolation.  The  consummation by the Seller and the Company of the
stock sale  contemplated  by  this  Agreement  will  not (a) violate or conflict
with the  Memorandum  of  Association  or  Articles of  Association,  or similar
instrument,  of the Company or any Subsidiary (as defined below),  (b) except as
set forth in this Agreement,  require the Seller,  the Company or any Subsidiary
to  obtain  the  consent,  approval  or  authorization  of any  governmental  or
quasi-governmental  person  or entity  prior to the  Closing,  except  where the
failure to obtain  such  consent,  approval  or  authorization  would not have a
Material Adverse Effect on the Company, or (c) give rise to a right to terminate
by the other party thereto or result in a breach of the terms or conditions  of,
or  constitute  a default  under,  or  violate,  as the case may be,  any Listed
Agreement (as defined below), except for any such termination,  breach,  default
or violation which would not have a Material Adverse Effect on the Company.

                                       4

<PAGE>

     2.4. Authority for Agreement.  All corporate and other proceedings required
to be taken by or on behalf of the  Company  and the  Seller  to  authorize  the
Company and the Seller to enter into and carry out this Agreement have been duly
and properly  taken.  This Agreement has been duly executed and delivered by the
Company and the Seller and is valid and binding upon the Company and the Seller,
subject as to  enforceability,  to bankruptcy,  insolvency,  reorganization  and
other laws of general  applicability  relating to or affecting creditors' rights
and to general principles of equity.

     2.5.  Capitalization.  The  authorized  capital of the Company  consists of
200,000  ordinary  shares,  NIS .010 nominal  value per share,  of which 120,519
shares are issued and outstanding.  All of such issued and outstanding  ordinary
shares of the Company  have been  legally and validly  issued and are fully paid
and nonassessable.  Of such 120,519 ordinary shares, the Seller and Holdings own
81,749 and 38,770 shares, respectively, and there is no other shareholder of the
Company.


     2.6. Options,  Warrants,  Etc. There are no outstanding options,  warrants,
rights,  calls,  commitments or agreements calling for the issuance or transfer,
sale or disposition  by the Company or any  Subsidiary of any shares,  issued or
unissued,  of the  capital  stock of the  Company or any  Subsidiary,  or of any
securities convertible or exchangeable,  actually or contingently, into any such
capital stock, to which the Company or any Subsidiary is a party or by which the
Company or any Subsidiary is bound.


     2.7. Officers and Directors.  Schedule 2.7 of the Company Schedule contains
a complete and correct list of the names and home  addresses of all officers and
directors of the Company, Holdings and each of the Subsidiaries.

     2.8. Subsidiaries. Schedule 2.8 of the Company Schedule provides a complete
list  of all of  the  subsidiaries  of the  Company  (the  "Subsidiaries"),  the
respective  jurisdictions of their  incorporation and the percentage and numbers
of their outstanding shares owned by the Company,  or any other person,  firm or
corporation.  For  purposes  of this  Agreement,  any  corporation  of which the
Company,  directly or indirectly,  through other corporations or otherwise, owns
50% or more of the outstanding capital stock shall be deemed to be a Subsidiary.
Each of the  Subsidiaries is qualified to do business in the  jurisdictions  set
forth in Schedule 2.8 of the Company  Schedule which are the only  jurisdictions
in which each such  Subsidiary  is required to be qualified in order to carry on
its business, and is duly authorized,  and licensed under all laws, regulations,
ordinances  or orders  of  public  authorities,  or  otherwise,  to carry on its
business  in the  places  and in the  manner  presently  conducted,  except  for
authorizations,  qualifications  or licenses for which the failure to obtain, if
required,  would  not  have  a  Material  Adverse  Effect  on the  Company.  The
outstanding  shares of capital  stock of each of the  Subsidiaries  are  validly
issued,  fully paid and  non-assessable,  and all of such outstanding  shares of
each of the  Subsidiaries  are owned by the  Company or another  Subsidiary  (or
their nominees) free of any claims, liens, charges or encumbrances of any nature
whatsoever (other than any claims,  liens, charges or encumbrances imposed under
applicable  securities  laws).  Each of the  Subsidiaries  is duly organized and
validly existing in good standing (with respect to jurisdictions which recognize
such concept) under the

                                        5
<PAGE>



laws of the  jurisdiction of its  organization and has the power to carry on its
business as now conducted and to own its assets.  The Company has made available
to the Purchaser true and complete  copies of the  Certificate of  Incorporation
(or similar  instrument) and By-Laws (or similar instrument) of each Subsidiary,
as in effect on the date  hereof.  The minute books of each  Subsidiary  contain
substantially  accurate  records of all  resolutions  adopted and other  actions
taken by its Board of  Directors  and its  shareholders  between the time of its
incorporation  and the  date of this  Agreement.  Neither  the  Company  nor any
Subsidiary has any  investments in any  corporation or other entity,  except for
short-term  investments in certificates of deposit,  and other deposits and debt
obligations with a maturity of not more than 180 days.

     2.9. Grants, Incentives and Subsidies. Schedule 2.9 of the Company Schedule
provides a complete list of all material  grants,  incentives and subsidies from
the Government of the State of Israel or any agency thereof or any  quasi-public
agency made  specifically  to the Company,  any  Subsidiary  or  Holdings,  with
respect to which the Company, any Subsidiary or Holdings has material continuing
obligations  ("Grants") ,  including,  without  limitation,  (i) Grants from the
Investment  Center  of the  Ministry  of  Industry  and Trade  (the  "Investment
Center"),  (ii) Grants from the office of the Chief Scientist of the Ministry of
Industry  and Trade (the "Chief  Scientist")  and (iii) Grants from the Fund for
Encouragement of Export. The Company is in compliance, in all material respects,
with the terms and  conditions  of the  Grants  and has duly  fulfilled,  in all
material  respects,  all the  undertakings  relating  thereto and all conditions
imposed  by  law  or  regulation  with  respect  thereto,   including,   without
limitation, Section A of the Law for The Encouragement of Industry, Research and
Development,  except  where the failure to be in  compliance  or to fulfill such
undertakings  or  conditions  would not have a  Material  Adverse  Effect on the
Company.  To the  knowledge  of the Company,  no event has occurred  which would
reasonably be expected to lead to the annulment or material limitation of any of
the Grants.

     2.10. Financial Statements.  The audited consolidated  financial statements
of the Seller and its consolidated subsidiaries for each of the years in the two
year period ended  December 31, 1996,  together  with the notes  thereto and the
reports  and  opinions   thereon  of  Kost,   Levary  and  Forer  (the  "Audited
Consolidated  Financial  Statements"),  and the unaudited consolidated financial
statements of the Seller and its  consolidated  subsidiaries  for the six months
ended June 30, 1997 and the notes thereto (the "Unaudited Consolidated Financial
Statements"),  all of which have  previously  been  delivered to the  Purchaser,
fairly  present  the  consolidated  financial  position  of the  Seller  and its
consolidated   subsidiaries,   as  of  the  respective  dates  thereof  and  the
consolidated  results of their  operations for the periods  indicated,  and were
prepared in conformity  with Israel  generally  accepted  accounting  principles
consistently   applied   throughout  the  periods   covered  thereby  except  as
specifically indicated therein (subject, in the case of unaudited statements, to
normal  recurring  audit  adjustments not material in scope or amount and except
that the  footnotes  contained in the unaudited  statements  may not satisfy the
requirements  applicable to the preparation of footnotes under Israel  generally
accepted accounting  principles).(The  Audited Consolidated Financial Statements
and the Unaudited

                                       6
<PAGE>

Consolidated Financial Statements are referred to collectively as the "Financial
Statements.") As of June 30, 1997, except for the Transferred Company Shares and
the  Holdings  Shares,  the  Seller  had no  assets of the type  required  to be
reflected in the assets column of an  unconsolidated  balance sheet  prepared in
accordance with Israel generally accepted accounting principles.

     2.11.  Actions  Since  June  30,  1997.  Except  (a) as  reflected  in,  or
contemplated  by, the  Financial  Statements  or (b) as otherwise  expressly set
forth in or  contemplated  by this Agreement or in the Exhibits hereto or in the
Company  Schedule  since  June 30, 1997,  neither the Company nor any Subsidiary
has: (i) issued or sold, or agreed to issue or sell, or purchased,  or agreed to
purchase,  any of its equity shares or securities  convertible  or  exchangeable
into such equity shares, or any options,  warrants,  rights or calls to purchase
such equity shares,  or other corporate  securities;  (ii) incurred any material
obligation  or  material  liability,  absolute  or  contingent,  of the type and
magnitude  required to be reflected in the liabilities  column of a consolidated
balance  sheet of the Company  prepared  in  accordance  with  Israel  generally
accepted  accounting  principles  except in the  ordinary  and  usual  course of
business;  (iii) discharged or satisfied any lien or encumbrance,  except in the
ordinary and usual course of business,  or paid or satisfied any liability other
than liabilities as at June 30, 1997, except in the ordinary and usual course of
business; (iv) entered into, or modified in any material respect, any employment
or consulting  agreement  (other than its agreement with Hambrecht & Quist LLC),
or made any wage or salary  increases  or granted any bonuses to its  employees,
except those made or granted in the  ordinary and usual course of business;  (v)
mortgaged, pledged or subjected to lien or other encumbrance ("Encumbrance") any
of its material properties or assets (other than (w) Encumbrances  arising under
or  relating  to any  license  agreement  to  which  the  Company  or any of the
Subsidiaries  is a party or by which the Company or any of its  Subsidiaries  is
bound, (x) liens for current taxes or other  governmental  charges or levies not
yet due, or for taxes or other governmental charges or levies being protested in
good faith,  (y) Encumbrances  arising from municipal and zoning  ordinances and
easements for public utilities,  and (z) such  imperfections in the title to the
assets and properties of the Company and its Subsidiaries and  Encumbrances,  if
any, as do not materially  detract from the value, or materially  interfere with
the  present or  continued  use,  of such  assets or  properties,  or  otherwise
materially impair the business or operations of the Company and its Subsidiaries
(Encumbrances  of the type referred to in clauses "(w)," "(x)," "(y)," and "(z)"
of this clause  "(v)" being  referred to herein as  "Permitted  Encumbrances"));
(vi) sold,  assigned or  transferred  any of its material  properties or assets,
except in the  ordinary and usual  course of  business;  (vii)  entered into any
material  transaction  not in the ordinary and usual course of business;  (viii)
irrevocably  waived any rights of substantial  value, or cancelled,  modified or
irrevocably waived any debts held by the Company or such Subsidiary in excess of
U.S.  $25,000 in the aggregate;  (ix) made or incurred  capital  expenditures in
excess of an aggregate of U.S.  $200,000 (the Company and all Subsidiaries to be
taken  as a whole  for  this  purpose);  (x)  declared,  paid or set  aside  any
dividends or other distributions or payments on its equity shares; (xi) made any
loans or advances to any person or assumed,  guaranteed,  endorsed or  otherwise
became  responsible  for the  obligations  of any  person,  except for loans and
advances to  employees  and to  unaffiliated  third  parties in the ordinary and
usual  course  of   business;   (xii)   effected   any  merger,   consolidation,
recapitalization,  stock split, stock dividend,  reorganization or other similar
transaction affecting the equity shares of the Company;  (xiii) made any illegal
payments to  governmental  or  quasi-governmental  officials;  or (xiv) made any
payments  that  have not been  properly  reflected  in the  Company's  books and
records to customers  for the sharing of fees or to  customers or suppliers  for
rebating of charges, or engaged

                                       7
<PAGE>

in other  reciprocal  practices  that have not been  properly  reflected  in the
Company's books and records.

     2.12. Liabilities Since June 30, 1997. There are no material liabilities or
obligations of the Company or any Subsidiary of the type and magnitude  required
to be disclosed in the liabilities column of a consolidated balance sheet of the
Company and its  consolidated  Subsidiaries  prepared in accordance  with Israel
generally accepted accounting principles,  whether accrued, absolute, contingent
or  otherwise,  and whether due or to become due,  which arose or, in accordance
with Israel generally accepted accounting principles,  were accrued or should be
accrued with respect to any period  beginning  after June 30, 1997 and ending on
the date of this  Agreement  other than (i) those  incurred in the  ordinary and
usual course of the business of the Company and its Subsidiaries, which have not
had in the  aggregate  a  Material  Adverse  Effect on the  Company,  (ii) those
intercompany  liabilities which are properly eliminated in consolidation,  (iii)
those expressly disclosed in any Exhibit hereto or in the Company Schedule, (iv)
those reasonably incurred in connection with this Agreement  including,  without
limitation,  any indebtedness incurred to pay any costs and expenses arising out
of the transactions  contemplated by this Agreement,  (v) those discharged prior
to the date of this  Agreement,  and (vi)  those  covered by  insurance  and not
otherwise having a Material Adverse Effect on the Company.

     2.13. Absence of Undisclosed  Liabilities.  As of June 30, 1997, there were
no liabilities or obligations of the Company or its consolidated subsidiaries of
the type and magnitude  required to be disclosed in the liabilities  column of a
consolidated  balance  sheet of the  Company and its  consolidated  Subsidiaries
prepared in accordance  with Israel  generally  accepted  accounting  principles
(whether  accrued,  absolute,  contingent  or  otherwise,  and whether due or to
become due),  which, in accordance  with Israel  generally  accepted  accounting
principles,  should have been accrued as of June 30, 1997,  other than (i) those
disclosed, or reflected as a liability or obligation, or reserved against on the
Unaudited Consolidated Financial Statements, (ii) those intercompany liabilities
or  obligations  between  the Company and its  Subsidiaries  which are  properly
eliminated  in  consolidation,  (iii) those  expressly  disclosed in any Exhibit
hereto or in the Company Schedule, and (iv) those fully covered by insurance and
not otherwise having a Material Adverse Effect on the Company.

     2.14.  Litigation.  There  are no  actions,  suits,  legal  proceedings  or
governmental or quasi-governmental investigations pending against the Company or
any Subsidiary before any court or governmental  agency or before any arbitrator
of any kind, or any order,  injunction or decree outstanding against the Company
or any  Subsidiary  and, to the  knowledge of the  Company,  no person has since
January 1, 1996 threatened orally (to any officer or director of the Company) or
in writing to commence any action,  suit or legal proceeding against the Company
or any Subsidiary or against or relating to their property,  assets or business,
that in any such case would  reasonably  be expected to have a Material  Adverse
Effect on the Company. Neither the Company nor any Subsidiary is in violation of
any applicable law, regulation,  ordinance, order, injunction,  decree, award or
other  requirement of any  governmental or  quasi-governmental  body,  court, or
arbitrator  relating  to its  property,  assets,  or  business,  except  for any
violation that would not have a Material Adverse Effect on the Company.

                                       8
<PAGE>

     2.15.  Permits.   The  Company  and  its  Subsidiaries  have  all  material
governmental permits, licenses,  orders, approvals,  franchises and other rights
and privileges  necessary  (including,  without  limitation,  approvals from the
Ministry of Defense and any other relevant  governmental  agency relating to the
development,  sale and export of  cryptography  technology) in order for them to
carry on their business as conducted as of the date hereof  (including,  without
limitation,  to manufacture,  sell and distribute any Material  Company Products
that are currently being  manufactured by the Company and its  Subsidiaries) and
to the  knowledge  of the  Company,  there are no  material  impediments  to the
obtaining of any required governmental  permits,  licenses,  orders,  approvals,
franchises  and other  rights and  privileges  as to the  development,  sale and
export of any Material Company Products under development,  except in each case,
such permits,  licenses,  orders,  approvals,  franchises,  and other rights and
privileges  of which  the  failure  to  obtain,  if  required,  would not have a
Material  Adverse Effect on the Company.  Schedule 2.15 of the Company  Schedule
sets forth a list of all such material permits,  licenses,  orders and approvals
from all  Israeli  and other  governmental  and  regulatory  bodies  held by the
Company and its Subsidiaries.

     2.16. Ownership of Assets. The Company and its Subsidiaries have good title
to all of their respective owned assets and properties,  tangible and intangible
(including  all  assets  reflected  in  the  Unaudited   Consolidated  Financial
Statements,  except those  disposed of in the ordinary  course of business since
June 30, 1997), and good title to their leasehold estates, in each case free and
clear of all Encumbrances except for Permitted Encumbrances. Except as set forth
in the Financial  Statements,  none of the material  properties or assets of the
Company  and its  Subsidiaries  the value of which is  reflected  in the  assets
column of the balance  sheet  included in the Unaudited  Consolidated  Financial
Statements, is held by the Company or any Subsidiary as lessee or subject to any
lease or as conditional  vendee under  conditional sale or other title retention
agreement or as optionee under any option to purchase.


     2.17. Intellectual Property.


          (a)  Schedule  2.17(a)-1  of the Company  Schedule  lists each patent,
patent application,  registered trademark,  trade name, registered service mark,
copyright and copyright  application  that (i) is owned by the Company or any of
its  Subsidiaries  as  of  the  date  of  this  Agreement,   and  (ii)  provides
intellectual  property  protection  for any  material  component of any Material
Company Product (or for any material component,  module,  feature or subassembly
thereof) or is otherwise  material to the conduct of the business of the Company
and its  Subsidiaries  (taken  as a  whole)  as of the  date of this  Agreement.
Schedule  2.17(a)-2 of the Company Schedule  identifies each patent,  trademark,
service mark and  copyright  that (A) is being  licensed by a third party to the
Company  or any of its  Subsidiaries  as of the  date  of  this  Agreement,  (B)
provides  intellectual  property  protection for any technology or invention for
which the Company  cannot obtain the  functional  equivalent  from more than one
source,  and (C)  provides  intellectual  property  protection  for any material
component  of any  Material  Company  Product  (or for any  material  component,
module,  feature or  subassembly  thereof).  Schedule  2.17(a)-2  of the Company
Schedule  further sets forth any such  license that  requires the Company or its
Subsidiaries  to pay any material  royalties  or any material  fixed or variable
fees or  consideration  for such  licensing.  Schedule  2.17(a)-3 of the Company
Schedule identifies each software system, software application,  software module
or

                                       9
<PAGE>


software  program,  hardware  component,  system or product or other  component,
card,  subassembly  or part  that:  (1) is a  material  component  of a Material
Company  Product,  and (2) has been  designed  or  developed  for the Company by
employees of or consultants to the Company prior to the date of this  Agreement.
For the purposes of this Agreement,  "Company Intellectual  Property" shall mean
both: (i) the items listed in Schedule  2.17(a)-1 and Schedule  2.17(a)-2 of the
Company  Schedule (which,  for purposes of this  definition,  shall be deemed to
include any item that should have been listed on Schedule  2.17(a)-1 or Schedule
2.17(a)-2 of the Company  Schedule by the terms of this Section  2.17(a) and was
not so listed) and (ii) any  technology,  know-how,  inventions  or  proprietary
information that (x) is (or is reasonably  likely to be) incorporated in, and is
a material component of, a Material Company Product (or any material  component,
module,  feature or  subassembly  thereof),  (y) is subject to protection  under
applicable  law as a trade  secret  right or  equivalent  intellectual  property
right,  and (z) is owned  by the  Company  or its  Subsidiaries;  and  "Material
Company Product" shall mean those existing and proposed  products of the Company
and its Subsidiaries listed on Schedule 2.17(a)-4 of the Company Schedule.

          (b) The Company Intellectual  Property set forth in Schedule 2.17(a)-1
of the Company  Schedule is owned by the  Company or its  Subsidiaries  free and
clear of all Encumbrances other than Permitted Encumbrances.

          (c) The sale of the  Transferred  Company Shares and Holding Shares by
the Seller to the Purchaser  under this  Agreement will not cause the forfeiture
or  termination of any of the rights of the Company or its  Subsidiaries  to the
Company  Intellectual  Property or in any way impair the right of the Company or
its Subsidiaries to sell,  license or dispose of, or to bring any action for the
infringement of, any Company Intellectual  Property or to manufacture,  sell and
use any Material  Company  Product,  except for any  forfeiture,  termination or
impairment  which would not  reasonably  be expected to have a Material  Adverse
Effect on the Company.

          (d)  There  are no  royalties,  honoraria  or other  similar  payments
payable by the Company or any of its Subsidiaries to any third party for the use
by the Company or any of its Subsidiaries of any Company  Intellectual  Property
or for the manufacture, sale or use by the Company or any of its Subsidiaries of
any Material Company Product, other than (i) payments to the Office of the Chief
Scientist, and (ii) payments under Listed Agreements.

          (e) To the knowledge of the Company, the Company Intellectual Property
that is owned by the Company, the use thereof by the Company or its Subsidiaries
and the manufacture,  sale or use of any Material Company Product by the Company
or its Subsidiaries  does not, in any case,  infringe upon any U.S.,  Israeli or
other foreign patent, trade secret, copyright,  trade name or other intellectual
property  right of any third party.  To the  knowledge of the Company,  no third
party is infringing upon any Company Intellectual  Property that is owned by the
Company,  except where the infringement would not reasonably be expected to have
a Material Adverse Effect on the Company.  The Company owns or has a valid right
to use (by license, title or other right) all Company Intellectual Property that
is  incorporated  in,  and is a material  component  of,  the  Material  Company
Products.  There is no action, suit or proceeding pending against the Company or
its  Subsidiaries  before  any  court  or  governmental  agency  or  before  any
arbitrator (and no person has since  January 1, 1996  threatened  orally (to an
officer or

                                       10
<PAGE>

director of the  Company) or in a writing  delivered  to the Company to commence
any  such  action,  suit  or  proceeding  against  the  Company  or  any  of its
Subsidiaries)  contesting the validity of, or the right of the Company or any of
its  Subsidiaries to own, use,  license or dispose of, any Company  Intellectual
Property or contesting  the right of the Company or any of its  Subsidiaries  to
manufacture, sell or use any Material Company Product.

     (f) The Individual Parent  Shareholders (as defined below) have assigned to
the Company (or have  otherwise  permitted  the Company to acquire) all of their
ownership rights (if any) in their Specified  Intellectual  Property (as defined
below) and have not voluntarily  assigned any of such ownership  rights (if any)
in their Specified Intellectual Property to any university or to any other third
party. Without limitation of the foregoing, there are no contractual obligations
binding on any of the Individual Parent  Shareholders with any other employer or
institute of higher education which gives rise to any meritorious  claim in such
employer or institute to any of the Specified Intellectual Property,  except any
such claim which  would not  reasonably  be expected to have a Material  Adverse
Effect on the Company.  For purposes of this  Agreement (A)  "Individual  Parent
Shareholders"  shall  mean  Yossi  Tulpan,  Amos Fiat and Yossi  Cohen,  and (B)
"Specified  Intellectual  Property" of an Individual  Parent  Shareholder  shall
mean: (i) those material patents developed by such Individual Parent Shareholder
that provide  intellectual  property  protection  for any software,  hardware or
invention  that (A) has been  personally  developed  by such  Individual  Parent
Shareholder,  and  (B) is  material  to the  business  of the  Company  and  its
Subsidiaries;  and (ii) those material copyrights and trade secrets developed by
such Individual Parent Shareholder that provide intellectual property protection
for  any  software,  hardware  or  invention  that  (A)  relates  to  encryption
technology,  (B)  has  been  personally  developed  by  such  Individual  Parent
Shareholder,  and  (C) is  material  to the  business  of the  Company  and  its
Subsidiaries.  For purposes of the preceding sentence, any software, hardware or
invention  will be deemed to be "material to the business of the Company and its
Subsidiaries"  only if such software,  hardware or invention is incorporated in,
and is a material  component of, any Material  Company  Product (or any material
component, module, feature or subassembly of any such Material Company Product).

     (g) The Company has taken  reasonable steps to implement a policy requiring
each employee and consultant of or to the Company and its Subsidiaries  that has
contributed in a material respect to the development of any software,  hardware,
inventions, improvements, know-how or other proprietary information incorporated
into a Material Company Product to enter into an agreement  substantially in the
form of that certain form of agreement  delivered to the Purchaser,  or to enter
into an ageement affording  comparable  protection to the protection provided by
such agreement delivered to the Purchaser.

     2.18. Real Estate. Schedule 2.18 of the Company Schedule sets forth a brief
description  of all real property  which is owned by or leased to the Company or
its  Subsidiaries.  None  of  the  properties  occupied  by the  Company  or its
Subsidiaries, or the occupancy or operation thereof by the Company or any of its
Subsidiaries,  is in  violation  of any law or any  building,  zoning  or  other
ordinance,  code or regulation in such a manner as to materially  interfere with
the use and  occupancy  thereof in the  ordinary  course of the  business of the
Company and its  Subsidiaries.  No written notice from any governmental body has
been served upon the Company or any of its  Subsidiaries  since  January 1, 1995
claiming any material violation by the Company or any of its Subsidiaries of any
such law,  ordinance,  code or regulation,  or requiring any

                                       11

<PAGE>

substantial  work,  repairs,   construction,   alterations  or  installation  be
undertaken by the Company or any of its  Subsidiaries  on or in connection  with
said  properties,  except for notices that have been  complied with or withdrawn
and notices of violations that have been cured in all material respects.

     2.19. Insurance.  Schedule 2.19 of the Company Schedule provides a complete
list  and  brief  description  of all  policies  of fire,  liability  (including
officers'  and  directors'  liability),  title,  key-man life and other forms of
insurance held by the Company and its Subsidiaries as of the date hereof.


     2.20. Company Taxes.


          (a) All taxes, including, without limitation, income, property, sales,
use, franchise, excise, value added, capital, social security,  withholding, and
employees'  withholding  taxes  imposed by the State of Israel,  by any  foreign
country,  or by any political  subdivision of the State of Israel or any foreign
country,  which  have  become  due  and  payable  by the  Company  or any of its
Subsidiaries  prior to the date of this  Agreement and which are material to the
Company and its Subsidiaries, including any material taxes for which the Company
or any of its  Subsidiaries  is  liable  under  contract  or other  arrangement,
together with any interest or penalties thereon (the "Company Taxes"), have been
paid in full or  adequately  provided  for by  reserves  shown  on the  books of
account of the Company;  all deposits  required by law to be made by the Company
and its Subsidiaries  with respect to the Company Taxes have been duly made, and
all material  returns with respect to the Company  Taxes which are levied on the
basis of income have been filed with, and where  indicated on Schedule 2.20.1 of
the Company Schedule, have been examined by the relevant tax authorities through
the fiscal years ended on or before  December 31, 1996, and no extension of time
for the  assessment  of  deficiencies  with  respect to  Company  Taxes has been
granted by the  Company  and is in effect for any  fiscal  year.  As of June 30,
1997,  neither the Company nor any  Subsidiary was liable for the payment of the
Company Taxes which are levied on the basis of income in any jurisdiction  other
than  those  listed  on  Schedules  2.2  and  2.8 of the  Company  Schedule.  No
deficiency  or  adjustment  in  respect  of any of the  Company  Taxes  has been
assessed  against  the  Company  or any  Subsidiary  prior  to the  date of this
Agreement  and remains  unpaid,  other than such  Company  Taxes which are being
contested  in good faith and  disclosure  of which has been  previously  made in
writing to the  Purchaser,  and to the knowledge of the Company there is not any
proposed or  threatened  assessment  of  additional  liability for Company Taxes
(that  remains  unpaid)  against  the Company or any  Subsidiary  for any period
ending prior to June 30, 1997.

          (b) Schedule  2.20.1 of the Company  Schedule  lists each material tax
incentive (other than generally  available  incentives that are not specifically
granted or awarded to the  Company) to which the  Company is entitled  under the
laws of the State of Israel as of the date of this  Agreement,  the  period  for
which such tax incentive applies,  and the nature of such tax incentive.  To the
knowledge  of  the  Company,   the  Company  has  complied   with  all  material
requirements  of  Israeli  law  to be  entitled  to  claim  the  tax  incentives
identified in Schedule 2.20.1 of the Company  Schedule.  To the knowledge of the
Company,  subject to the  receipt  of the  approvals  set forth in  Section  8.3
hereof, the consummation of the stock purchase contemplated

                                       12
<PAGE>

by this Agreement  will not  materially and adversely  affect the ability of the
Company to claim the benefit of any tax incentive referred to on Schedule 2.20.1
of the Company  Schedule for the remaining  duration of the incentive or require
any  recapture of any such  previous  incentive  claimed by the Company,  and no
consent or approval of any  governmental  authority is  required,  other than as
contemplated  by Section 8.3 hereof prior to  consummation of the stock purchase
contemplated  by this  Agreement  in order to preserve  the  entitlement  of the
Company to any such incentive.

     2.21.  Environmental  Matters.  The  Company  and its  Subsidiaries  are in
substantial  compliance  with  all  applicable  environmental   regulations  and
environmental standards applicable to the conduct of the business of the Company
and its Subsidiaries, as the case may be (except where the failure to be in such
compliance would not have a Material  Adverse Effect on the Company),  and there
exists  no  unlawfully  stored  or  maintained  toxic  waste or  other  unlawful
environmental  hazard that has not  previously  been disclosed in writing to the
Purchaser and which is not reflected in the  Financial  Statements,  which would
have a Material Adverse Effect on the Company.


     2.22. Agreements and Obligations.


     (a) A "Listed  Agreement" shall mean a material executory contract to which
the Company or any of its  Subsidiaries or Holdings is a party as of the date of
this  Agreement  that is in one of the  categories  specified  in the  following
clauses  "(i)"  through  "(xv)" and that is not an Excluded  Agreement:  (i) any
contract pursuant to which any Company  Intellectual  Property is being licensed
by the Company or any of its  Subsidiaries  to any third  party  (other than (A)
end-user  licenses  entered into in the ordinary  course of business and (B) any
contract entered into on terms that do not materially deviate from the Company's
standard  terms  previously  disclosed  to the  Purchaser),  (ii)  any  contract
pursuant  to which (A) a third party is  licensing  to the Company or any of its
Subsidiaries any material software, patents, or other proprietary information or
technical  know-how and (B) the Company is required to pay a material royalty or
any other material fixed or variable fee or  consideration  for such  licensing,
(iii)  any   employment   contract  that  is  with  any  employee  whose  annual
compensation exceeds $50,000 that has a remaining term exceeding six (6) months,
(iv)  any  consulting   contract  that  is  with  any  consultant  whose  annual
compensation  exceeds  $50,000,  (v) any  contract  with  any  current  officer,
director, employee or stockholder of the Company, the Seller or the Subsidiaries
(or with an affiliate or relative of any such officers, directors,  employees or
stockholders)  that is on terms  that are less  favorable  to the  Company  than
comparable contracts negotiated at arm's length, or that requires the Company to
indemnify  such  officers,   directors,   employees  or  stockholders  in  their
capacities  as such,  (vi) any pension,  retirement,  profit  sharing,  deferred
compensation,  health or life  insurance,  bonus or  incentive  plan,  (vii) any
contract  pursuant  to which the Company or any of its  Subsidiaries  is leasing
real  property from any third party,  (viii) any contract  pursuant to which the
Company or any of its Subsidiaries is leasing  personal  property from any third
party and which requires  payments by the Company or any of its  Subsidiaries of
more than  $10,000  per  annum,  (ix) any union or other  collective  bargaining
agreement,  (x) any  contract  for the  purchase  by the  Company  or any of its
Subsidiaries  of materials,  products,  supplies or equipment which (A) requires
that the  Company  or any of its  Subsidiaries  pay in the  future  in excess of
$50,000, (B) contains any escalator or renegotiation or redetermination  clause,
or (C) commits the

                                       13
<PAGE>

Company or any of its  Subsidiaries  for a fixed  term of three  months or more,
(xi) any agreement or instrument  evidencing  indebtedness for borrowed money in
excess of $50,000 or  creating  any  security  interest  (other than a Permitted
Encumbrance) in any material property owned or used by the Company or any of its
Subsidiaries,  (xii) any contract containing  covenants limiting in any material
respect the legal right of the Company or any of its  Subsidiaries to compete in
any material line of business in which the Company or any of its Subsidiaries is
or has  historically  been  engaged,  (xiii)  any  material  reseller,  original
equipment  manufacturer  or  distribution  agreement,  (xiv) any contract with a
customer of the Company for the sharing of fees, the rebating of charges to such
customer,  or other similar arrangement not reflected in the Company's books and
records, or (xv) any contract with holders of the Company's  securities in their
capacities as such.  Notwithstanding  anything to the contrary contained in this
Agreement,  a contract that is an "Excluded Agreement" shall not be deemed to be
a "Listed Agreement." An "Excluded Agreement" shall mean a contract that: (w) is
between or among two or more of the Company and its Subsidiaries or Holdings, or
(x)  imposes  no  material  future  obligations  on  the  Company  or any of its
Subsidiaries,  or (y) is  expected to be fully  performed,  or is  scheduled  to
expire,  on or prior to the date 90 days  after the  Closing  Date  without  any
continuing  material  financial  liability  on the  part of the  Company  or its
Subsidiaries,  or (z) can be canceled or otherwise  terminated by the Company or
any of its  Subsidiaries  on notice of 90 days or less  without  any  continuing
material  financial  liability  on the part of the Company or its  Subsidiaries;
provided,  however,  that any  agreement  pursuant  to which the  Company or its
Subsidiaries  license any  Company  Intellectual  Property  from any third party
shall not be deemed an Excluded Agreement by virtue of the preceding clauses (y)
or (z).

          (b)  Schedule  2.22 of the  Company  Schedule  lists all of the Listed
Agreements.  A true and  correct  copy of each  Listed  Agreement  has been made
available to the Purchaser.

          (c) The Company and its  Subsidiaries  are not in breach or default in
any  material  respect  under any of the Listed  Agreements  such that the other
party would be permitted  to terminate a Listed  Agreement or would have a claim
for  material  damages  against  the  Company  or  its  Subsidiaries  and to the
knowledge  of the  Company  (i) no other  party  thereto  is in  default  in any
material  respect  thereunder,  and (ii) no event has occurred  which,  with the
giving of notice or the  passage  of time,  would  become  such a default by the
Company or any of its Subsidiaries such that such other party would be permitted
to  terminate  any such  Listed  Agreement  or would  have a claim for  material
damages against the defaulting party. The Company has taken all corporate action
necessary for the Company to properly  enter into the Listed  Agreements and has
not terminated or taken any action to terminate any of the Listed Agreements. To
the  knowledge  of the Company,  there are no writings  extrinsic to any of such
Listed Agreements which would materially modify their terms.

          (d) None of the Listed  Agreements  that have been  furnished  or made
available  only in a language  other than  English or Hebrew:  (i) limits in any
material  respect the legal right of the Company or its  Subsidiaries to compete
in any material line of business,  (ii) contains any unduly  burdensome  term or
covenant  that is  reasonably  likely to have a Material  Adverse  Effect on the
Company, or (iii) grants a material exclusive license to a third party as to any
Company Intellectual Property.

                                       14
<PAGE>

     2.23.  Inventory.  The  inventory  of the Company and its  Subsidiaries  as
reflected on the balance sheet included in the Unaudited  Consolidated Financial
Statements  (which has not been sold by the  Company or its  Subsidiaries  since
June 30,  1997)  is,  in all  material  respects:  (i) in good and  merchantable
condition,  and (ii) currently of a useable and saleable quality. Such inventory
is carried on the relevant books of account at values that approximate the lower
of cost or market,  in  conformity  with Israel  generally  accepted  accounting
principles applied on a consistent basis.

     2.24. Accounts Receivable. All accounts receivable reflected on the balance
sheet included in the Unaudited Consolidated Financial Statements have arisen in
the ordinary  course of business  and, to the extent not collected  prior to the
date hereof, represent valid obligations due to the Company or its Subsidiaries,
in the aggregate recorded amounts thereof, except to the extent set forth in the
Unaudited Consolidated Financial Statements as reserves for bad debts.

     2.25.  Condition of Plant and Equipment.  All machinery and equipment owned
by the  Company or any  Subsidiary  or  otherwise  used in the  conduct of their
business is, to the knowledge of the Company,  in good  operating  condition and
repair, except for normal breakdowns, reasonable wear and use and damage by fire
or unavoidable casualty, not materially affecting the business of the Company.

     2.26. Customers and Suppliers.  Schedule 2.26 of the Company Schedule lists
the ten largest  customers and the ten largest  suppliers of the Company and its
Subsidiaries on a consolidated basis for the year ended December 31, 1996. Since
January 1,  1997,  there has been no  material  adverse  change in the  business
relationship of the Company with any customer or supplier named on Schedule 2.26
of the  Company  Schedule  (except for  fluctuations  in the level of orders and
changes in the Company's customer base which have not had and are not reasonably
likely to have a Material Adverse Effect on the Company).

     2.27.  Banking  Arrangements.  Schedule  2.27 of the Company  Schedule sets
forth:  (i) the  name of each  bank,  trust  company,  brokerage  firm or  other
financial  institution  in or with  which the  Company  or a  Subsidiary  has an
account having a balance of at least $10,000 as of the date of this Agreement, a
credit line with an  outstanding  balance of at least  $10,000 as of the date of
this  Agreement  or a safety  deposit box  containing  assets with a value of at
least  $10,000  as of the date of this  Agreement  and the names of all  persons
authorized  as of the date of this  Agreement to draw  thereon or having  access
thereto, and a brief statement describing the purpose of each such account.

     2.28.  Company  Products.  To the  knowledge  of the  Company,  none of the
existing products of the Company have any defects in design or otherwise fail to
comply with their published  specifications  where, in either case, such defects
or non-compliance would have a Material Adverse Effect on the Company.

     2.29. Potential Conflicts of Interest; Powers of Attorney. To the knowledge
of the  Company,  no officer,  director or greater  than 5%  shareholder  of the
Company or its Subsidiaries, or any member of their immediate families, owns any
material  property  or  rights  tangible  or  intangible,  the use of  which  is
necessary for such  business as now  conducted.  Schedule  2.29

                                       15
<PAGE>


of the Company  Schedule sets forth the names of all persons now holding  powers
of attorney from the Company or any Subsidiary as of the date of this Agreement,
and a summary of the terms thereof.


     2.30. Interested Party Transactions. Since January 1, 1996, there have been
no  transactions  involving the Company or the  Subsidiaries  and any interested
parties which come within the purview of Chapter 4A of the  Companies  Ordinance
(new Version) 1983.

     2.31.  Brokers.  Except with respect to the engagement of Hambrecht & Quist
LLC by the Company,  the terms of which have been  presented  to the  Purchaser,
neither the Company nor any of its officers or directors has engaged,  consented
to, or authorized  any broker or investment  banker to act on its or his behalf,
directly  or  indirectly,   as  a  broker  or  finder  in  connection  with  the
transactions contemplated by this Agreement.


     2.32.  Compliance  with Law.  The Company is in  compliance  with all laws,
regulations  and  orders   applicable  to  its  business,   including,   without
limitation, applicable environmental, anti-pollution, building, zoning or health
laws,  ordinances  and  regulations  in respect of its  plants,  structures  and
equipment, except where the failure by the Company to be in compliance with such
laws,  regulations  and orders would not have a Material  Adverse  Effect on the
Company.  The Company has not  received any written  notification  that it is in
violation of any such laws,  regulations or orders,  except for (i) notices that
have been  complied with in all material  respects,  (ii) notices that have been
withdrawn,  or (iii) notices of violations  that have been cured in all material
respects, or that relate to violations which can no longer form the basis of any
material liability to the Company or would not otherwise  reasonably be expected
to have a Material  Adverse  Effect on the Company.  Neither the Company nor, to
the  knowledge  of the Company,  any employee or agent of the Company  acting on
behalf of the  Company  has made any illegal  payments  to any  governmental  or
quasi-governmental officials.


     2.33.  Foreign  Investor.  The  Seller  is  not a  U.S.  person  and is not
acquiring the shares of Purchaser Common Stock for the account or benefit of any
U.S.  person,  as those terms are defined in  Regulation S under the  Securities
Act.

     2.34. Resales Subject to U.S. Securities Laws. The Seller acknowledges that
the shares of Purchaser Common Stock being issued to the Seller pursuant to this
Agreement  have not been  registered  under the  Securities  Act,  and agrees to
resell the shares of Purchaser  Common Stock being issued to the Seller pursuant
to this Agreement only in accordance with the Seller's Agreement.

     2.35.  Offshore  Execution.  This Agreement is being executed by the Seller
outside the United States.

     2.36. Holdings.


          (a) Holdings (i) has not conducted any material business following its
initial  organization,  (ii) has not  incurred any  material  liabilities  since
January  1,  1997 of the type and  magnitude  required  to be  reflected  in the
liabilities  column of a  consolidated  balance  sheet of  Holdings  prepared in
accordance with Israel generally accepted accounting principles,

                                       16

<PAGE>

or (iii)  has not  directly  incurred  liabilities  or  obligations,  actual  or
contingent, that exceed or may exceed in the aggregate $10,000. Holdings (1) has
no  subsidiaries,  (2) does not own any  securities of any entity other than the
Company,  and (3) has title to 38,770 ordinary  shares of the Company,  free and
clear  of  all  liens,  pledges,  charges,  encumbrances,   security  interests,
restrictive   agreements   and   assessments   (other   than   restrictions   on
transferability  generally  imposed on securities  under  applicable  securities
laws).

          (b) The authorized  capital of Holdings  consists of 238,000  ordinary
shares,  NIS .010 nominal value per share, of which 81,749 shares are issued and
outstanding as of the date of this Agreement.  All of the issued and outstanding
ordinary  shares of Holdings have been legally and validly  issued and are fully
paid and  nonassessable.  There are no outstanding  options,  warrants,  rights,
calls,  commitments or agreements calling for the issuance or transfer,  sale or
disposition  by Holdings of any shares of the capital  stock of Holdings,  or of
any securities convertible or exchangeable,  actually or contingently,  into any
such capital stock, to which Holdings is a party or by which Holdings is bound.



                                   ARTICLE III

                 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER


         The Purchaser hereby  represents and warrants to the Seller,  except as
otherwise set forth in the Disclosure  Schedule being furnished by the Purchaser
to the Seller  simultaneously  with the execution and delivery of this Agreement
(the "Purchaser Schedule"), or as disclosed or otherwise described in any of the
documents listed or set forth in the Purchaser  Schedule or this Article III, as
follows:

     3.1.  Organization  of  Purchaser.  The  Purchaser  is a  corporation  duly
organized and validly existing under the laws of the State of California and has
full power and authority to carry on its business as now  conducted,  and to own
its assets.  The  Purchaser  is duly  qualified  to do  business  and is in good
standing in each  jurisdiction  in which the failure to be so  qualified  and in
good standing would have a Material  Adverse  Effect on the  Purchaser,  is duly
authorized  and licensed  under all laws,  regulations,  ordinances or orders of
public authorities,  or otherwise, to carry on its business in the places and in
the manner presently  conducted,  except for  qualifications,  authorizations or
licenses for which the failure to obtain, if required, would not have a Material
Adverse Effect on the Purchaser.  The Purchaser has heretofore made available to
the Company true and complete copies of its Articles of Incorporation and Bylaws
as certified by the Secretary of the Purchaser, as in effect on the date hereof.
For  purposes of this  Agreement,  those  corporations  in which the  Purchaser,
directly or indirectly,  through other  corporations  or otherwise,  owns 50% or
more  of the  outstanding  capital  stock  shall  be  deemed  to be a  Purchaser
Subsidiary.

     3.2. Nonviolation.  The consummation by the Purchaser of the stock purchase
contemplated  by this  Agreement  will  not (a)  violate  or  conflict  with the
Articles of Incorporation or Bylaws of the Purchaser or any Purchaser Subsidiary
(b) except as set forth in this  Agreement,  require  the  consent,  approval or
authorization of any governmental or quasi-governmental person or entity, except
where the failure to obtain such consent, approval or

                                       17

<PAGE>

authorization would not have a Material Adverse Effect on the Purchaser,  or (c)
give rise to a right to  terminate  by the other  party  thereto  or result in a
breach of the terms or conditions of or constitute a default under,  or violate,
as the case may be, any Material Agreement (as defined below).

     3.3. Authority for Agreement.  All corporate and other proceedings required
to be taken by or on  behalf of the  Purchaser  to  authorize  and  approve  the
entering into and carrying out of this Agreement by the Purchaser have been duly
executed and properly taken. This Agreement has been duly executed and delivered
by the Purchaser  and is valid and binding upon the  Purchaser,  subject,  as to
enforceability,  to  bankruptcy,  insolvency,  reorganization  and other laws of
general applicability  relating to or affecting creditors' rights and to general
principles of equity.

     3.4. Capitalization. As of August 28, 1997, the authorized capital stock of
the Purchaser  consisted of (i) 5,000,000  shares of Preferred  Stock,  $.01 par
value per  share,  of which no shares  were  issued  and  outstanding,  and (ii)
45,000,000  shares of Purchaser  Common Stock, of which  26,003,636  shares were
issued and  outstanding.  All of the issued and outstanding  shares of Purchaser
Common  Stock  have been  legally  and  validly  issued  and are fully  paid and
nonassessable.  The shares of Purchaser  Common  Stock to be issued  pursuant to
this  Agreement  will  be duly  authorized,  validly  issued,  fully  paid,  and
nonassessable.

     3.5. Options, Warrants, Etc. Other than as set forth in Section 3.4 hereof,
there are no other  outstanding  shares of capital stock or voting securities of
the  Purchaser  other than shares of  Purchaser  Common  Stock  issued under the
Purchaser's  various  stock  option  plans as in effect at the date  hereof (the
"Purchaser Stock Option Plans"). As of the close of business on August 28, 1997,
the  Purchaser  has  reserved  5,950,000  shares of  Purchaser  Common Stock for
issuance to  employees  and  directors  pursuant to the  Purchaser  Stock Option
Plans,  of which  3,897,051  shares  were  subject to  outstanding,  unexercised
options.  Other than this  Agreement and pursuant to the Purchaser  Stock Option
Plans,  and except as  disclosed  in the  Purchaser  SEC  Documents  (as defined
below),  there are no other options,  warrants,  calls,  rights,  commitments or
agreements of any  character to which the Purchaser or any Purchaser  Subsidiary
is a party or is bound  obligating the Purchaser or any Purchaser  Subsidiary to
issue, deliver,  sell,  repurchase or redeem, or cause to be issued,  delivered,
sold,  repurchased or redeemed, any shares of the capital stock of the Purchaser
or any  Purchaser  Subsidiary  or  obligating  the  Purchaser  or any  Purchaser
Subsidiary to grant, extend or enter into any such option, warrant, call, right,
commitment or agreement.

     3.6. SEC  Documents;  Financial  Statements.  The  Purchaser  has filed all
statements,   reports,  registration  statements,  proxy  statements  and  other
documents required to be filed by the Purchaser with the Securities and Exchange
Commission  (the  "SEC")  since  January 1, 1996 and has made  available  to the
Company a true and complete copy of each such  statement,  report,  registration
statement  (with the prospectus in the form filed pursuant to Rule 424(b) of the
Securities Act),  definitive  proxy  statement,  and other documents in the form
filed with the SEC by the Purchaser from January 1, 1996, and, until the Closing
Date,  the  Purchaser  will have  furnished  the Company  with true and complete
copies of any additional  documents filed with the SEC by the Purchaser prior to
the Closing Date (all such statements,  reports,  registration statements, proxy
statements and other documents filed by the Purchaser with the SEC are

                                       18

<PAGE>

referred to as the "Purchaser SEC  Documents").  In addition,  the Purchaser has
made available to the Company all exhibits to the Purchaser SEC Documents  filed
prior to the date hereof,  and will promptly  make  available to the Company all
exhibits to any  additional  Purchaser SEC Documents  filed prior to the Closing
Date.  All  documents  required  to be filed as exhibits  to the  Purchaser  SEC
Documents have been so filed, and all Material  Agreements (as defined below) so
filed as exhibits are in full force and effect,  except those which have expired
in accordance  with their terms,  and Purchaser is not in default under any such
Material  Agreements.  As of their  respective  filing dates,  the Purchaser SEC
Documents  complied  in all  material  respects  with  the  requirements  of the
Securities  Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and the
Securities  Act, and none of the Purchaser  SEC  Documents  contained any untrue
statement of a material  fact or omitted to state a material fact required to be
stated therein or necessary to make the statements made therein, in light of the
circumstances  in which they were  made,  not  misleading,  except to the extent
corrected  by  a  subsequently  filed  Purchaser  SEC  Document.  The  financial
statements of Purchaser,  including the notes thereto, included in the Purchaser
SEC Documents (the "Purchaser  Financial  Statements") were complete and correct
in all material  respects as of their respective  dates,  complied as to form in
all material  respects  with  applicable  accounting  requirements  and with the
published  rules and  regulations  of the SEC with  respect  thereto as of their
respective  dates,  and have been  prepared in  accordance  with U.S.  generally
accepted accounting principles ("GAAP") applied on a consistent basis throughout
the periods indicated and consistent with each other (except as may be indicated
in the  notes  thereto  or,  in the case of  unaudited  statements  included  in
Quarterly  Reports  on Form 10-Q,  as  permitted  by Form 10-Q of the SEC).  The
Purchaser  Financial  Statements  fairly  present  the  consolidated   financial
condition  and  operating  results of the  Purchaser at the dates and during the
periods  indicated  therein (subject,  in the case of unaudited  statements,  to
normal,  recurring  year-end audit adjustments not material in scope or amount).
There  has been no  change  in the  Purchaser  accounting  policies,  except  as
described in the notes to the Purchaser Financial  Statements,  since January 1,
1996.

     3.7.  Absence  of Certain  Changes.  Since  June 30,  1997 (the  "Purchaser
Balance Sheet  Date"),  the Purchaser has conducted its business in the ordinary
course consistent with past practice and there has not occurred: (i) any change,
event or  condition  that has resulted  in, or might  reasonably  be expected to
result  in, a  Material  Adverse  Effect on the  Purchaser;  (ii) any  change in
accounting  methods or practices  by the  Purchaser  or any  revaluation  by the
Purchaser of any of its assets; (iii) any declaration, setting aside, or payment
of a dividend or other distribution with respect to the shares of the Purchaser,
or any direct or  indirect  redemption,  purchase  or other  acquisition  by the
Purchaser of any of its shares of capital  stock,  except for regular  dividends
and stock repurchases at market prices at the time of repurchase,  and except as
set forth in the Purchaser SEC  Documents;  (iv) any material  contract  entered
into by the  Purchaser or any  Purchaser  Subsidiary  other than in the ordinary
course of business,  or any material  amendment  or  termination  of, or default
under, any material contract to which the Purchaser or any Purchaser  Subsidiary
is a party or by which it is bound;  or (v) any  negotiation or agreement by the
Purchaser or any Purchaser  Subsidiary to do any of the things  described in the
preceding clauses (i) through (iv).

     3.8. Absence of Undisclosed Liabilities.  As of the Purchaser Balance Sheet
Date,  the Purchaser has no material  obligations or liabilities of the type and
magnitude  required to be disclosed in the liabilities  column of a consolidated
balance  sheet  prepared in accordance with

                                       19
<PAGE>

GAAP (whether accrued, absolute,  contingent or otherwise, and whether due or to
become  due) other than (i) those set forth or  adequately  provided  for in the
balance  sheet  included in  Purchaser's  Quarterly  Report on Form 10-Q for the
period ended June 30, 1997 (the "Purchaser Balance Sheet"), (ii) those expressly
disclosed  in any  Exhibit  hereto or in the  Purchaser  Schedule,  (iii)  those
incurred in  connection  with the  execution of this  Agreement,  and (iv) those
fully covered by insurance and not otherwise having a Material Adverse Effect on
the Purchaser.

     3.9.  Permits.   The  Purchaser  and  each  Purchaser  Subsidiary  has  all
governmental permits, licenses,  orders, approvals,  franchises and other rights
and privileges necessary in order for them to carry on their respective business
as  presently  conducted,  except such  permits,  licenses,  orders,  approvals,
franchises,  and other rights and privileges of which the failure to obtain,  if
required, would not have a Material Adverse Effect on the Purchaser.

     3.10.  Litigation.  There  are no  actions,  suits,  legal  proceedings  or
governmental or quasi-governmental  investigations,  pending before any court or
governmental  agency  or  before  any  arbitrator  of any  kind,  or any  order,
injunction or decree  outstanding,  and, to the knowledge of the  Purchaser,  no
person has since January 1, 1996 threatened  orally (to any executive officer or
director of the  Purchaser) or in writing to commence any action,  suit or legal
proceeding  against the  Purchaser  or any  Purchaser  Subsidiary  or against or
relating to either of their property,  assets or business, that would reasonably
be  expected to have a Material  Adverse  Effect on the  Purchaser.  Neither the
Purchaser nor any Purchaser  Subsidiary is in violation of any  applicable  law,
regulation,  ordinance, order, injunction, decree, award or other requirement of
any governmental or  quasi-governmental  body, court, or arbitrator  relating to
its property, assets, or business, except for violations which  would not have a
Material Adverse Effect on the Purchaser.

     3.11. Broker's and Finders' Fees. Except for the fees of its advisor, Volpe
Brown Whelan & Company LLC, the Purchaser  has not incurred,  nor will it incur,
directly or indirectly,  any liability for brokerage or finders' fees or agents'
commissions  or investment  bankers'  fees or any similar  charges in connection
with this Agreement or any transaction contemplated hereby.

     3.12. Material Agreements

          (a) A "Material  Agreement"  shall mean any  agreement  or contract to
which  the  Purchaser  or any  Purchaser  Subsidiary  is a party or by which the
Purchaser  or a Purchaser  Subsidiary  is bound and that is or is required to be
filed as an  exhibit  to any of the  Purchaser  SEC  Documents  pursuant  to the
applicable  rules and  regulations  of the SEC and (ii) that has not  expired or
been validly terminated prior to the date hereof.

          (b) The Purchaser and the Purchaser  Subsidiaries are not in breach or
default in any material  respect under any of the Material  Agreements such that
the other party would be permitted  to  terminate a Material  Agreement or would
have a claim  for  material  damages  against  the  Purchaser  or the  Purchaser
Subsidiaries. To the knowledge of the Purchaser (i) no other party thereto is in
any default in any material  respect  under any Material  Agreement  and (ii) no
event has  occurred  which,  with the  giving of notice or the  passage of time,
would  become  such  a  default  by  the  Purchaser  or  any  of  the  Purchaser
Subsidiaries such that

                                       20
<PAGE>

such other party would be  permitted  to terminate  such  Material  Agreement or
would have a claim for material damages against the defaulting party. All of the
Material Agreements are valid and in full force and effect and, to the knowledge
of the Purchaser,  none is subject to rescission or reformation and there are no
circumstances  or writings  extrinsic to any of such Material  Agreements  which
would materially modify their terms or prevent their assignment.

     3.13.  Compliance  with Law. The Purchaser is in compliance  with all laws,
regulations  and  orders   applicable  to  its  business,   including,   without
limitation, applicable environmental, anti-pollution, building, zoning or health
laws,  ordinances  and  regulations  in respect of its  plants,  structures  and
equipment,  except where the failure by the Purchaser to be in  compliance  with
such laws,  regulations  and orders would not have a Material  Adverse Effect on
the  Purchaser.  The Purchaser has not received any  notification  that it is in
violation of any such laws,  regulations or orders,  except for (i) notices that
have been  complied with in all material  respects,  (ii) notices that have been
withdrawn,  or (iii) notices of violations  that have been cured in all material
respects or that relate to violations  which can no longer form the basis of any
material liability of the Purchaser or would otherwise reasonably be expected to
have a Material  Adverse Effect on the Purchaser.  Neither the Purchaser nor, to
the knowledge of the Purchaser, any employee or agent of the Purchaser acting on
behalf of the Purchaser  has made any illegal  payments to any  governmental  or
quasi-governmental officials.

     3.14. Purchaser Taxes. All taxes,  including,  without limitation,  income,
property, sales, use, franchise,  excise, value added, capital, social security,
withholding,  and employees'  withholding taxes imposed by the United States, by
any foreign country, or by any political subdivision of the United States or any
foreign  country,  which have become due and payable by the  Purchaser or any of
the  Purchaser  Subsidiaries  prior to the date of this  Agreement and which are
material to the Purchaser and the Purchaser Subsidiaries, including any material
taxes for which the  Purchaser or any of the  Purchaser  Subsidiaries  is liable
under  contract or other  arrangement,  together  with any interest or penalties
thereon (the "Purchaser  Taxes"),  have been paid in full or adequately provided
for by reserves  shown on the books of account of the  Purchaser;  all  deposits
required by law to be made by the Purchaser and the Purchaser  Subsidiaries with
respect to the Purchaser  Taxes have been duly made. No deficiency or adjustment
in respect of any of the Purchaser Taxes has been assessed against the Purchaser
or any  Purchaser  Subsidiary  prior to the date of this  Agreement  and remains
unpaid,  other than such Purchaser Taxes which are being contested in good faith
and to the  knowledge of the  Purchaser  there is not any proposed or threatened
assessment of additional liability for the Purchaser Taxes (that remains unpaid)
against the Purchaser or any Purchaser Subsidiary for any period ending prior to
December 31 1996.

     3.15.  Investment  Intent of the  Purchaser.  Purchaser  is  acquiring  the
Transferred  Company Shares and the Holdings  Shares for its own account and for
investment,  and not  with a view  to,  or for  sale  in  connection  with,  any
distribution of any of such shares.

                                       21


<PAGE>


                                   ARTICLE IV

                       CERTAIN TRANSACTIONS AND AGREEMENTS


     4.1. The  Confidentiality  Agreement.  That certain  Mutual  Non-Disclosure
Agreement,  dated as of June 12, 1997 between the Company and the Purchaser (the
"Confidentiality  Agreement") shall remain in full force and effect between them
and shall not be  terminated or otherwise  modified by this  Agreement and shall
survive any termination of this Agreement in accordance with its terms.


     4.2.  Conduct of Business of the Company and Its  Subsidiaries.  During the
period from the date of this Agreement and  continuing  until the earlier of the
termination  of this Agreement or the Closing Date (the  "Pre-Closing  Period"),
the Company  agrees  (except as otherwise  provided in the last sentence of this
Section 4.2),  and shall  (except as otherwise  provided in the last sentence of
Section  4.2)  cause its  Subsidiaries:  (i) to carry on their  business  in all
material respects in the usual, regular and ordinary course in substantially the
same manner as heretofore  conducted,  (ii) to use their  reasonable  efforts to
preserve substantially intact their present business organizations, (iii) to use
their  reasonable  efforts  consistent  with past practice to keep available the
services of their present  officers and key  employees,  (iv) to use  reasonable
efforts  consistent  with past  practice to preserve  their  relationships  with
customers,  suppliers,  distributors,  licensors,  licensees,  and others having
business  dealings  with  them,  and (v) to  promptly  notify the  Purchaser  in
writing,  after obtaining  knowledge,  of any event or occurrence which would be
likely to cause any  representation or warranty  contained in this Agreement and
made  by it to be  untrue  or  inaccurate  at any  time  from  the  date of this
Agreement to the Closing  Date,  such that the  condition set forth in the first
sentence  of Section  7.1 hereof  would not be  satisfied  as a result  thereof.
Without  limitation  of the  foregoing,  the  Company  agrees  that  during  the
Pre-Closing  Period  (except as otherwise  provided in the last sentence of this
Section 4.2), it will not take any of the following actions:


          (a) Charter Documents. Amend its Memorandum of Association or Articles
of Association;

          (b) Issuance of Securities.  Issue,  deliver or sell any shares of its
capital stock or securities convertible into, or subscriptions, rights, warrants
or options  to  acquire,  or enter into any  agreements  or  commitments  of any
character  obligating  it  to  issue,  any  such  shares  or  other  convertible
securities;

          (c) Dividends;  Changes in Capital Stock. Declare or pay any dividends
on, or make any other  distributions  (whether in cash,  stock or  property)  in
respect of, any shares of its capital stock, or split, combine or reclassify any
shares of its capital  stock,  or issue any other  securities  in respect of, in
lieu of or in  substitution  for shares of its capital  stock,  or repurchase or
otherwise acquire any shares of its capital stock;


                                       22
<PAGE>

          (d) Extraordinary  Transactions.  Enter into any material  transaction
outside the ordinary course of business;

          (e) Stock Option Plans, Etc. Adopt any stock option plan;

          (f) Intellectual Property. Transfer to any person or entity any rights
to the Company  Intellectual  Property other than in connection with the sale of
its products in the ordinary course of business consistent with past practice;

          (g) Exclusive Rights.  Enter into or amend any agreements  pursuant to
which any other party is granted  exclusive  marketing or other exclusive rights
of any type or scope  with  respect  to any  Material  Company  Products  or the
Company Intellectual Property; or

          (h) Other.  Agree in writing to take any of the actions  described  in
clauses "(a)" through "(g)" of this sentence.

Notwithstanding  anything  to the  contrary  contained  in this  Section  4.2 or
elsewhere  in this  Agreement,  the  Company and its  Subsidiaries  shall not be
prohibited  from taking,  and shall be permitted to take,  any of the  following
actions (without being deemed to have breached or violated this Agreement):  (i)
any action that is  contemplated  or permitted by, or otherwise  consistent with
the terms of, this Agreement, (ii) any action that is referred to in the Company
Schedule or is  contemplated  or required by the terms of any agreement or other
document identified in the Company Schedule, (iii) any action that is reasonably
determined  by the  Company to be  necessary  or  desirable  for the  purpose of
facilitating the  consummation of any of the  transactions  contemplated by this
Agreement or for the purpose of  facilitating  the  compliance by the Company or
any of its Subsidiaries with any applicable law, rule or regulation, or (iv) any
action that is approved in writing by the  Purchaser (it being  understood  that
the Purchaser  shall not  unreasonably  withhold its approval of any such action
that is proposed to be taken by the Company).


     4.3. Conduct of Business of Purchaser. The Purchaser agrees that during the
Pre-Closing  Period  (except as otherwise  provided in the last sentence of this
Section 4.3), it will not take or permit any Purchaser Subsidiary to take any of
the following actions:

          (a) Charter Documents. Amend its Articles of Incorporation or Bylaws;

          (b) Issuance of Securities.  Issue,  deliver or sell any shares of its
capital stock or securities convertible into, or subscriptions, rights, warrants
or options  to  acquire,  or enter into any  agreements  or  commitments  of any
character  obligating  it  to  issue,  any  such  shares  or  other  convertible
securities,  other than (1) the  issuance,  delivery  and/or  sale of options to
purchase a reasonable  number of shares of Purchaser  Common Stock in connection
with the hiring, retention and/or promotion of employees of the Purchaser or the
Purchaser Subsidiaries,  or (2) the issuance of shares of Purchaser Common Stock
pursuant to the exercise of stock options or other rights  outstanding as of the
date of this  Agreement or issued after the date of this Agreement in accordance
with clause "(1)" of this Section 4.3(b);

                                       23
<PAGE>

          (c) Dividends;  Changes in Capital Stock. Declare or pay any dividends
on, or make any other  distributions  (whether in cash,  stock or  property)  in
respect of, any shares of its capital stock, or split, combine or reclassify any
of its capital stock, or issue any other securities in respect of, in lieu of or
in  substitution  for shares of its capital  stock,  or  repurchase or otherwise
acquire any shares of its capital stock except from former employees,  directors
and consultants in accordance  with  agreements  existing as of the date of this
Agreement  providing  for the  repurchase  of  shares  in  connection  with  any
termination of service to it or its subsidiaries;

          (d) Extraordinary  Transactions.  Enter into any material  transaction
outside the ordinary course of business; or

          (e) Other.  Agree in writing to take any of the actions  described  in
clauses "(a)" through "(d)" of this Section 4.3.


Notwithstanding  anything  to the  contrary  contained  in this  Section  4.3 or
elsewhere in this Agreement,  the Purchaser and the Purchaser Subsidiaries shall
not be prohibited  from taking,  and shall be permitted to take,  (i) any action
that is contemplated or permitted by, or otherwise consistent with the terms of,
this Agreement, (ii) any action that is referred to in the Purchaser Schedule or
is  contemplated  or required by the terms of any  agreement  or other  document
identified  in the  Purchaser  Schedule,  (iii) any  action  that is  reasonably
determined  by the  Purchaser to be  necessary  or desirable  for the purpose of
facilitating the  consummation of any of the  transactions  contemplated by this
Agreement or for the purpose of facilitating  the compliance by the Purchaser or
any Purchaser  Subsidiary with any applicable  law, rule or regulation,  or (iv)
any action that is approved in writing by the Company (it being  understood that
the Company shall not unreasonably withhold its approval of any such action that
is proposed to be taken by the Purchaser).


     4.4. Access to Information.


          (a) During the Pre-Closing  Period,  the Seller will cause the Company
to  grant  the   Purchaser  and  its   accountants,   legal  counsel  and  other
representatives access, during normal business hours and upon reasonable advance
notice  throughout  the period prior to the Closing,  to all of the  properties,
books, contracts,  commitments and records relating to the business,  assets and
liabilities of the Company; provided,  however, that (i) the Purchaser shall not
contact,  and the  Purchaser  shall ensure that none of its  accountants,  legal
counsel or other representatives contacts, any employee of the Company or any of
the Subsidiaries without the prior authorization of one of the Individual Parent
Shareholders,  and (ii) the Purchaser  shall ensure that none of its  employees,
legal counsel or other representatives interferes with or otherwise disrupts the
business  or  operations  of  the  Company  or any  of  its  Subsidiaries  while
exercising the rights provided under this Section 4.4(a).

         (b) The  Purchaser  will  grant the Seller  and the  Company  and their
respective  accountants,  legal counsel and other representatives access, during
normal business hours and upon reasonable  advance notice  throughout the period
prior to the Closing, to all of the properties,  books,  contracts,  commitments
and records  relating to the business,  assets and liabilities of the Purchaser;
provided,  however,  that (i) neither the Company nor the Seller shall  contact,
and the  Company  and

                                       24
<PAGE>


the Seller shall ensure that none of their respective accountants, legal counsel
or other  representatives  contacts,  any employee of the Purchaser  (other than
those who will be engaged in the  negotiation  of this  Agreement),  without the
prior  authorization  of Robert F. Fougner,  and (ii) the Company and the Seller
shall ensure that none of their  respective  employees,  legal  counsel or other
representatives interferes with or otherwise disrupts the business or operations
of the Purchaser while exercising the rights provided in this Section 4.4(b).

     4.5. No Solicitation.  During the Pre-Closing  Period,  neither the Company
nor the Seller will,  and the Company and the Seller will not  authorize  any of
its  officers,  directors,  employees or other agents to: (i) take any action to
solicit,  initiate  or  knowingly  encourage  any offer or proposal by any third
party for,  or any  indication  of  interest  by any third party in, a merger or
business  combination  by such third party with,  the  acquisition by such third
party of any voting  power in, or the sale or  transfer  (outside  the  ordinary
course of business) to such third party of a  significant  portion of the assets
of, the Company or any material Subsidiary, or (ii) engage in negotiations with,
or  disclose  any  nonpublic  information  relating to the Company to, or afford
access to the properties,  books or records of the Company or any Subsidiary to,
any third party that has advised the Company that it may be considering  making,
or that it has made, an offer or proposal for, or any indication of interest in,
a merger or business  combination  with,  the  acquisition  of any of the voting
power in, or the sale or transfer (outside the ordinary course of business) of a
significant  portion of the assets of, the Company or any  material  Subsidiary,
other than the transactions contemplated by this Agreement.

     4.6. Seller's Agreement. On or before the Closing Date, the Seller and each
of its shareholders (the "Parent Shareholders") shall execute and deliver to the
Purchaser, and the Purchaser shall execute and deliver to the Seller and to each
of the Parent Shareholders, that certain Seller's Agreement in substantially the
form attached  hereto as Exhibit 4.6  ("Seller's  Agreement")  providing  (among
other things) for certain resale  restrictions and registration rights following
the  Closing as to the shares of  Purchaser  Common  Stock  issued to the Seller
hereunder.


     4.7.  Further  Assurances.  Each of the parties hereto agrees that it will,
from time to time after the date of this  Agreement,  execute and  deliver  such
other certificates,  documents and instruments and take such other action as may
be reasonably requested by any of the other parties to carry out the actions and
transactions  contemplated by this  Agreement.  Each of the parties hereto shall
use all reasonable  efforts to take, or cause to be taken, all actions necessary
to consummate the transactions contemplated by this Agreement.  Without limiting
the generality of the foregoing, each party to this Agreement (i) shall make all
filings (if any) and give all notices (if any)  required to be made and given by
such party in connection with the  transactions  contemplated by this Agreement,
(ii) shall use all  reasonable  efforts to obtain each  consent and approval (if
any) required to be obtained  (pursuant to any applicable  legal  requirement or
contract,  or  otherwise)  by such  party in  connection  with the  transactions
contemplated  by this  Agreement,  (iii) shall  cooperate  with each other party
hereto in  connection  with any filings  required to be made or any  consents or
approvals  required to be obtained by such other  party,  and (iv) shall use all
reasonable  efforts to lift any restraint,  injunction or other legal bar to the
consummation of the transactions contemplated by this Agreement.

                                       25
<PAGE>


     4.8. Listing of Additional Shares. Prior to the Closing Date, the Purchaser
shall file with the Nasdaq  National  Market a Notification  Form for Listing of
Additional  Shares with respect to those shares of Purchaser  Common Stock to be
issued in connection with the transactions contemplated by this Agreement.

     4.9.  Visitation.  The Purchaser will afford to one  representative  of the
Seller or the Parent Shareholders ("Seller's Board Representative") the right as
a non-voting representative of the Seller or of the Parent Shareholders:  (a) to
attend all meetings of the Purchaser's Board of Directors (the "Board") (subject
to the  Purchaser's  right to request  in good  faith  that such  representative
excuse himself from executive sessions of the Board where a conflict of interest
might be  present  and from  any  Board  meeting  or any  part  thereof  if such
exclusion is reasonably  necessary to preserve the  attorney-client  privilege),
and (b) upon  request,  to  receive  copies  of all  notices  for and  materials
distributed  at or in  connection  with such  meetings,  as well as any proposed
written actions by the Board concurrently with the distribution of such items to
the Board.  Any change in the Seller's  Board  Representative  shall require ten
(10) days  prior  written  notice to the  Purchaser  and the  Purchaser's  prior
written approval,  which shall not be unreasonably withheld if any of the Parent
Shareholders  or an  officer  of any of the  Parent  Shareholders  is the  newly
designated Seller's Board Representative.  Commencing as of the Purchaser's 1998
annual meeting of shareholders,  the Purchaser  agrees, if requested by at least
three of the Parent  Shareholders,  to use its reasonable  efforts to: (1) cause
the  Seller's  Board  Representative  to be  elected  to the  Board;  and (2) if
required to permit  Purchaser to comply with the preceding clause (1), amend the
Purchaser's  bylaws to increase the number of authorized  positions on the Board
to ten (10).  The  Purchaser's  obligations  pursuant to this  Section 4.9 shall
cease at such time as the aggregate  number of shares of Purchaser  Common Stock
beneficially  owned by the Seller,  the Parent  Shareholders  and the respective
relatives and affiliates of the Seller and the Parent  Shareholders is less than
1,500,000 shares of Purchaser Common Stock (as adjusted for stock splits,  stock
dividends and the like).

     4.10. Employee Benefits.  For a period of not less than two years after the
Closing  Date and  subject to such  adjustments  as are  reasonably  required to
reflect local laws and commercial  customs  relating to employee  benefits,  the
Purchaser  shall,  and shall cause the Company and its  Subsidiaries to, provide
each  employee of the  Company and its  Subsidiaries  with  benefits,  including
health and welfare and paid-time off  benefits,  which either are  equivalent to
those currently provided by the Company or, if changed, are no less favorable in
the aggregate than those provided by the Purchaser to its existing  employees of
equal rank and seniority.  To the extent that any employee of the Company or any
of its Subsidiaries becomes eligible to participate in any employee benefit plan
of the Purchaser  after the Closing Date, the Purchaser  shall,  and shall cause
the Company and its Subsidiaries to: (i) credit such employee's service with the
Company or its  Subsidiaries  (to the same extent as such  service was  credited
under the similar  employee  benefit  plans of the Company and its  Subsidiaries
immediately  prior to the Closing Date) for purposes of determining  eligibility
to  participate  in and  vesting  under,  and for  purposes of  calculating  the
benefits  under,  such employee  benefit plan of the  Purchaser,  (ii) waive any
pre-existing condition limitations, waiting periods or similar limitations under
such employee benefit plan of the Purchaser and (iii) provide such employee with
credit  for any  co-payments  previously  made  and any  deductibles  previously
satisfied.

                                       26
<PAGE>

     4.11. Indemnification.

          (a) For a period of at least seven years from the  Closing  Date,  the
Purchaser  shall,  and shall  cause the  Company  to,  fulfill  and honor in all
respects  all  rights  to  indemnification  existing  in  favor  of the  current
directors and officers of the Company (the "Indemnified  Parties"),  as provided
in the Company's  Articles of  Association  (as in effect as of the date of this
Agreement) and as provided in any indemnification agreements between the Company
and such Indemnified Parties (as in effect as of the date of this Agreement) and
as otherwise existing in favor of the Indemnified Parties; provided that nothing
contained  herein shall  obligate the Purchaser to maintain any  directors'  and
officers' liability insurance in favor of the Indemnified Parties.

          (b) Without  limiting the generality of the  foregoing,  the Purchaser
shall  ensure  that  adequate  funds are  available  (either  directly  from the
Purchaser or through the Company) to the Indemnified  Parties in order to ensure
that the indemnification  obligations referred to in this Section 4.11 are fully
satisfied. In the event any claim, action or proceeding is asserted or commenced
against any Indemnified  Party,  (1) after the Closing Date, the Purchaser shall
advance and pay the reasonable fees and expenses of any counsel retained by such
Indemnified Party in connection with such claim,  action or proceeding  promptly
after receipt of a request  therefor from such  Indemnified  Party,  and (2) the
Purchaser  shall  cooperate  with such  Indemnified  Party and such  Indemnified
Party's counsel,  and shall cause the Company to cooperate with such Indemnified
Party and such Indemnified Party's counsel, in the defense of such claim, action
or proceeding.

          (c)  This  Section  4.11  shall  survive  the   consummation   of  the
transactions  contemplated hereby, is intended to benefit and may be enforced by
the Indemnified  Parties,  and shall be binding on all successors and assigns of
the Purchaser and the Company.

          (d) The Purchaser shall pay all expenses,  including  attorneys' fees,
that may be incurred by any  Indemnified  Party in enforcing  the  indemnity and
other obligations provided for in this Section 4.11.

          (e)  Notwithstanding  any term or condition of this Section  4.11,  no
indemnification  shall  be made by the  Company  or the  Purchaser  pursuant  to
Section  4.11(a) (or pursuant to any  indemnification  agreement  or  instrument
referenced  in  Section  4.11(a))  to any  Indemnified  Party  if the  facts  or
circumstances  that would  otherwise give rise to such right of  indemnification
further  give  the  Purchaser  a  valid  and  meritorious  basis  for  obtaining
indemnification  (exclusive of the limits set forth in Sections 5.5, 5.6 and 5.7
hereof) under Article V hereof.


     4.12.  Compliance  with Chief  Scientist  Regulation.  The Purchaser  shall
provide any  undertakings  as are reasonably  required by the Chief Scientist of
the Ministry of Industry and Commerce  with regard to  maintaining  ownership of
the Company Intellectual  Property in the State of Israel and with regard to
such other  matters as are  reasonably  required by the Chief  Scientist  of the
Ministry of Industry and Commerce, in order to obtain the consent referred to in
Sections 7.4(a) and 8.3(b) hereof.

                                       27
<PAGE>

     4.13. Section 338 Election. At or following the Closing, the Seller agrees,
if requested in writing by the  Purchaser,  to make an election  under  Internal
Revenue  Code  Section  338  ("Section  338  Election")   with  respect  to  the
transactions  contemplated hereby and to execute and deliver to the Company such
elections,  approvals and other  documents and to otherwise  take such action as
the Purchaser  shall  reasonably  request to effect the Section 338 Election for
U.S. income tax purposes.


                                   ARTICLE V

                            INDEMNIFICATION; REMEDIES


     5.1. Survival. All pre-Closing covenants of the parties shall terminate and
expire as of the Closing Date,  and all liability of the parties with respect to
such  covenants  shall  thereupon  be  extinguished.   All  representations  and
warranties contained in this Agreement (each as modified by the Company Schedule
and the Purchaser Schedule,  as the case may be, and any update or supplement to
the Company  Schedule or the  Purchaser  Schedule  delivered to Purchaser or the
Company,  as the case may be, as provided in this  Agreement)  shall survive the
Closing  until the  second  anniversary  of the  Closing  Date (the  "Expiration
Date"),  at which time such  representations  and warranties shall terminate and
expire and shall cease to be of any force or effect,  and all  liability  of the
parties with respect to such  representations  and warranties shall thereupon be
extinguished;  provided, however, that (i) if, prior to the Expiration Date, the
Purchaser  shall  have  duly  delivered  a Claim  Notice  to both  the  Seller's
Representative  and the Escrow Agent in  conformity  with all of the  applicable
procedures set forth in the Escrow  Agreement and in Section 5.7 hereof then the
specific  indemnification claim set forth in such Claim Notice shall survive the
Expiration Date (and shall not be extinguished  thereby),  and (ii) if, prior to
the  Expiration  Date, the Seller's  Representative  shall have duly delivered a
Claim  Notice  to the  Purchaser  in  conformity  with  all  of  the  applicable
procedures  set forth in Section 5.7 herof,  then the  specific  indemnification
claim set forth in such Claim  Notice  shall  survive the  Expiration  Date (and
shall not be extinguished thereby).

     5.2.   Indemnification  by  the  Seller.  Subject  to  the  limitations  on
indemnification  set forth in Sections  5.5, 5.6 and 5.7 hereof and elsewhere in
this Agreement,  from and after the Closing Date, the Seller shall,  from and to
the extent of the Escrow  Fund (as defined in the Escrow  Agreement),  indemnify
and hold harmless the Purchaser  and each of the Purchaser  Subsidiaries  (which
shall be deemed to include the Company  after the Closing  Date) and its agents,
representatives, employees, officers, directors, successors, controlling persons
and  affiliates  (in their  capacities as such)  (collectively,  the  "Purchaser
Indemnitees"),  and shall  reimburse  the Purchaser  Indemnitees,  for any loss,
liability,  damage, expense (including,  but not limited to, reasonable costs of
investigation  and  defense  and  reasonable  attorneys'  fees),  whether or not
involving  a  third-party  claim  (collectively,  "Damages"),  incurred  by  the
Purchaser  Indemnitees  as a  result  of  (a)  any  inaccuracy  in  any  of  the
representations and warranties of the Seller in Article II of this Agreement (as
modified by the Company  Schedule  and any update or  supplement  to the Company
Schedule  delivered to the  Purchaser  prior to the Closing Date but only to the
extent such update or supplement relates to events occurring or discovered after
the date of this  Agreement),  (b) any  failure of the  Company or the Seller to
perform or comply with any post-

                                       28
<PAGE>


Closing  agreement or covenant to be performed or complied with by it under this
Agreement,  or (c) any claim by any person for  brokerage  or  finder's  fees or
similar  payments  in  connection  with  any  of the  transactions  contemplated
hereunder as the result of brokers,  finders or investment  bankers  retained by
the Company or the Seller or any Parent Shareholder.

     5.3.  Indemnification  by the  Purchaser.  Subject  to the  limitations  on
indemnification  set forth in Sections  5.5, 5.6 and 5.7 hereof and elsewhere in
this  Agreement,  from and after the Closing Date, the Purchaser shall indemnify
and hold harmless the Seller, the Parent Shareholders and the respective agents,
representatives, employees, officers, directors, successors, controlling persons
and affiliates of the Seller and the Parent Shareholders (in their capacities as
such) (the "Seller  Indemnitees"),  and shall reimburse the Seller  Indemnitees,
for  any  Damages  arising  as a  result  of (a)  any  inaccuracy  in any of the
representations and warranties of the Purchaser in Article III of this Agreement
(as  modified by the  Purchaser  Schedule  and any update or  supplement  to the
Purchaser  Schedule delivered to the Company and the Seller prior to the Closing
Date  but only to the  extent  such  update  or  supplement  relates  to  events
occurring or discovered  after the date of this  Agreement),  (b) any failure by
the Purchaser to perform or comply with any  post-Closing  agreement or covenant
to be performed or complied with by the Purchaser in this Agreement,  or (c) any
claim by any person for  brokerage  or  finder's  fees or  similar  payments  in
connection with any of the transactions  contemplated hereunder as the result of
brokers, finders or investment bankers retained by the Purchaser.

     5.4.   Notification;   Control  of  Proceedings.   The  party  entitled  to
indemnification  pursuant to this Article V  ("Indemnified  Party") shall,  with
reasonable   promptness,   give  to  the  party   obligated   to  provide   such
indemnification  hereunder  (an  "Indemnifying  Party")  written  notice  if the
Indemnified Party becomes aware of any loss, liability,  damage, or expense with
respect to which a claim for indemnification may be asserted; provided, however,
that for the sole purpose of determining whether written notice must be provided
to an  Indemnifying  Party  under  this  Section  5.4  (and for the  purpose  of
determining  whether  the  Indenmifying  Party  will  have the right to defend a
particular claim action or proceeding),  the limitation set forth in Section 5.5
hereof shall not be taken into account;  provided,  further,  however,  that the
failure of an Indemnified  Party to deliver such written notice with  reasonable
promptness  shall  not be  deemed to bar or  otherwise  limit the  rights of the
Indemnified Party hereunder unless such failure materially prejudices the rights
or defenses of the Indemnifying Party. If any claim is made by a third person or
an action or  proceeding  commenced for which the  Indemnified  Party shall seek
indemnity from the Indemnifying  Party, the Indemnified Party shall give to such
Indemnifying Party reasonable written notice of such claim, action or proceeding
and request the Indemnifying  Party to defend the same. The  Indemnifying  Party
shall  have the right to defend  such  claim,  action or  proceeding  at its own
expense,  and (if the  Indemnifying  Party  elects to accept the defense of such
claim,  action or proceeding) shall give written notice to the Indemnified Party
of the commencement of such defense with reasonable  promptness after the giving
of the written  notice of the claim,  action or  proceeding  by the  Indemnified
Party. The Indemnified Party shall be entitled to participate at its own expense
with  the  Indemnifying  Party  in such  defense  (subject  to the  right of the
Indemnifying  Party to control such  defense),  but shall not be entitled in any
way to release,  waive,  settle,  modify or pay such claim, action or proceeding
without the written consent of the  Indemnifying  Party (which consent shall not
be unreasonably  withheld),  if the Indemnifying Party has assumed such defense.
In the event the  Indemnifying  Party does not accept the defense of such claim,
action or proceeding, as provided above, or

                                       29
<PAGE>


     does not notify the Indemnified Party of its election to defend such claim,
action, or proceeding,  within 30 days after the Indemnifying Party's receipt of
written notice of such claim, action, or proceeding, from the Indemnified Party,
the  Indemnified  Party shall have the full right to defend  against such claim,
action  or  proceeding  in  such  manner  as it may  deem  appropriate,  but the
Indemnifying  Party shall not have any liability  with respect to any compromise
or settlement  effected  without its prior written  consent (which consent shall
not be unreasonably  withheld). In the event the Indemnifying Party shall assume
the defense of such claim,  action,  or proceeding,  the Indemnified Party shall
cooperate in the defense of such claim,  action or proceeding and the records of
each shall be  available to the other with  respect to such  defense;  provided,
however,  that the  Indemnifying  Party  shall not,  in the  defense of any such
claim, action or proceeding,  consent to the entry of any judgment or enter into
any  settlement  where such entry of judgment or  settlement  does not include a
provision  releasing the  Indemnified  Party from all liability  with respect to
such claim,  action,  or  proceeding,  except  with the  written  consent of the
Indemnified Party (which consent shall not be unreasonably withheld).

     5.5.  Limitation  on  Indemnification.  Notwithstanding  the  provisions of
Sections  5.2 and 5.3  hereof,  no  Indemnifying  Party  shall be  liable to any
Indemnified  Party  with  respect  to:  (a) any  claim by an  Indemnified  Party
pursuant to clause (a) of Section 5.2 hereof or clause (a) of Section 5.3 hereof
except to the extent that the  cumulative  amount of the  indemnifiable  Damages
actually  incurred by the Indemnified  Party as a result of all  inaccuracies in
the  Indemnifying  Party's   representations  and  warranties  actually  exceeds
$250,000;  and the  Indemnifying  Party shall only be required to pay, and shall
only  be  liable  for,  the  amount  by  which  the  cumulative  amount  of  the
indemnifiable  Damages actually incurred by the Indemnified Party as a result of
all such inaccuracies in such  representations  and warranties  actually exceeds
$250,000;  or (b)  any  claim  based  on the  inaccuracy  of  any  warranty  and
representation of the Indemnifying Party if the Indemnified Party (or any of its
officers and directors in the case of an Indemnified Party that is a corporation
or a limited  liability  company) had actual knowledge of the inaccuracy of such
representation  and warranty (or of any facts or  circumstances  constituting or
resulting  in  such  inaccuracy)  prior  to the  Closing,  provided,  that,  the
limitation provided by this clause (b) shall not be available to an Indemnifying
Party  if  that  Indemnifying  Party  also  had  such  actual  knowledge  of the
inaccuracy of such representation and warranty (or of any facts or circumstances
constituting  or  resulting  in such  inaccuracy)  prior to the  signing of this
Agreement by the Indemnifying Party.


     5.6. Exclusive Remedy.


          (a) Except as  provided  in the  Parent  Shareholders  Agreement,  the
indemnification  provided for in this Article V shall be the exclusive right and
remedy with respect to any claim by an Indemnified  Party pursuant to clause (a)
of  Section  5.2  hereof or clause (a) of Section  5.3  hereof,  and,  except as
provided in this  Section  5.6, no claim or cause of action with  respect to any
misrepresentation or any inaccuracy,  breach or default as to any representation
or warranty  contained in Article II or Article III of this  Agreement  shall be
enforceable  unless made in accordance with the procedures,  and within the time
periods,  set forth in this Article V. Without  limiting the  generality  of the
foregoing,  and except as  provided in this  Section  5.6(a),  (i) any  payments
required to be made by the Seller under this Article V shall be made exclusively
from the Escrow Shares under the Escrow Agreement,  and the Purchaser shall have
no recourse against the Seller or

                                       30
<PAGE>

the  Parent  Shareholders,  or  against  any of the  assets of the Seller or the
Parent Shareholders,  in connection with any indemnification claim, and (ii) any
payments  required to be made by the Purchaser  under this Article V (other than
for breaches occurring after the Closing of any covenant contained in Article I,
IV,  IX  or XI  hereof)  shall  be  limited  to an  aggregate  amount  equal  to
U.S.$16,540,000;

          (b)  Nothing  contained  in the Parent  Shareholders  Agreement  shall
require the Purchaser to first assert its rights and remedies under this Article
V or the Escrow Agreement or the Parent  Shareholders  Agreement as to any claim
by the  Purchaser  that is  based on the  inaccuracy  of any  representation  or
warranty in both this Agreement and the Parent  Shareholders  Agreement.  To the
extent that the Purchaser  shall first  recover  Damages from one or more of the
Parent Shareholders  pursuant to the Parent Shareholders  Agreement prior to any
recovery  pursuant to Article V of this Agreement or the Escrow  Agreement,  the
amounts recovered from such Parent Shareholder(s) shall be deducted from amounts
payable to the Purchaser  Indemnitees pursuant to Article V of this Agreement or
the Escrow Agreement.


     5.7. Indemnification Claims.


     (a) If an  Indemnified  Party  wishes to assert  an  indemnification  claim
against any Indemnifying  Party, the Indemnified Party shall deliver or cause to
be  delivered  to the entity or  entities  specified  below a written  notice (a
"Claim  Notice")  setting  forth (a) the  specific  representation,  warranty or
post-Closing  covenant alleged to have been breached by such Indemnifying Party,
(b) a summary of the facts and  circumstances  giving rise to the alleged breach
of such representation, warranty or post-Closing covenant, and (c) a description
of, and a  reasonable  estimate  of the total  amount of, the  Damages  actually
incurred or expected to be incurred by the Indemnified  Party as a direct result
of such alleged breach. If the Indemnified Party is a Purchaser Indemnitee, such
Purchaser Indemnitee shall deliver a copy of the Claim Notice  simultaneously to
the Seller's  Representative and the Escrow Agent. If the Indemnified Party is a
Seller  Indemnitee,  such Seller  Indemnitee  shall  deliver a copy of the Claim
Notice to the Purchaser.


          (b)  Notwithstanding  anything  to  the  contrary  contained  in  this
Agreement or in the Escrow Agreement, no Purchaser Indemnitee shall be permitted
to deliver any Claim  Notice (and no Purchaser  Indemnitee  shall be entitled to
assert any  indemnification  claim set forth in any Claim  Notice)  unless  such
Purchaser  Indemnitee  reasonably believes that a representation or warranty has
been  breached  by the Seller in a manner  that  would  entitle  such  Purchaser
Indemnitee to be indemnified under this Article V.


          (c)  Notwithstanding  anything  to  the  contrary  contained  in  this
Agreement,  no Seller  Indemnitee shall be permitted to deliver any Claim Notice
(and  none  of  the no  Seller  Indemnitee  shall  be  entitled  to  assert  any
indemnification  claim  set  forth  in any  Claim  Notice)  unless  such  Seller
Indemnitee  reasonably believes that a representation,  warranty or covenant has
been  breached  by the  Purchaser  in a manner  that would  entitle  such Seller
Indemnitee to be indemnified under this Article V.


          (d)  Notwithstanding  anything to the  contrary  contained  in this
Agreement,  if a Claim Notice shall not have been delivered to the  Indemnifying
Party (and, if the Indemnifying 

                                       31
<PAGE>


Party is the Seller,  also to the Escrow  Agent) prior to the  Expiration  Date,
then such Claim Notice shall not be deemed to have been  delivered  and shall be
of no force or effect.

          (e)  Only  the   Purchaser   itself   shall  be   entitled  to  assert
indemnification  claims  against the Seller  under this Article V; any claim for
indemnification  by any  other  Purchaser  Indemnitee  must be  asserted  by the
Purchaser   on  behalf  of  such   Purchaser   Indemnitee.   Only  the  Seller's
Representative  (as defined  below) shall be entitled to assert  indemnification
claims against the Purchaser under this Article V; any claim for indemnification
by any Seller  Indemnitee  must be asserted by the  Seller's  Representative  on
behalf of such Seller Indemnitee.


          5.8.  Subrogation.  To the extent that any Indemnifying Party makes or
is required to make any indemnification payment to an Indemnified Party, (i) the
Indemnifying  Party shall be entitled to exercise,  and shall be subrogated  to,
any rights and remedies  (including rights of indemnity,  rights of contribution
and other rights of recovery) that the  Indemnified  Party or its affiliates may
have against any other person or entity (other than the Indemnified Party or its
affiliates)  with respect to any Damages,  circumstances or matter to which such
indemnification  payment is directly or indirectly related; (ii) the Indemnified
Party shall  permit the  Indemnifying  Party to use the name of the  Indemnified
Party  or the  Indemnified  Party's  affiliates,  in any  transaction  or in any
proceeding or other matter  involving any of such rights or remedies;  and (iii)
the Indemnified  Party shall take and shall cause each of its affiliates to take
such actions as the Indemnifying Party may reasonably request for the purpose of
enabling the Indemnifying Party to perfect or exercise the Indemnifying  Party's
right  of  subrogation  hereunder.  Any  rights  of  an  Indemnifying  Party  to
subrogation  pursuant to this  Section 5.8 shall not be  exercisable  until such
Indemnifying  Party shall have fully performed its obligations  pursuant to this
Article V as to the  indemnification  of the Indemnified  Party (with respect to
the particular indemnification claim involved);  provided,  however, that, prior
to the full  performance of such  indemnification  obligations and to the extent
reasonably  required  to  preserve  the  rights  of the  Indemnifying  Party  to
subrogation,  the  Indemnifying  Party shall be  permitted to take any action so
required to preserve such subrogation rights.


     5.9. Seller's Representative.


     (a) Zeev  May  shall  be  constituted  and  appointed  as agent  ("Seller's
Representative")  for and on behalf of the Seller and the Parent Shareholders to
give and receive  notices and  communications,  to authorize the Escrow Agent to
deliver funds out of escrow to the Purchaser, to agree to, negotiate, enter into
settlements and compromises of, and demand arbitration and comply with orders of
courts and awards of arbitrators with respect to indemnification  claims, and to
take all actions  necessary  or  appropriate  in the  judgment  of the  Seller's
Representative  for the  accomplishment  of the  foregoing.  Such  agency may be
changed  from time to time upon not less than five days'  prior  written  notice
from the Seller or, if the Seller  has been  liquidated,  from any three  Parent
Shareholders,  to the  Purchaser.  Notices  or  communications  to or  from  the
Seller's Representative shall constitute notice to or from the Seller.

     (b) The Seller's Representative shall have reasonable access to information
about the  Company  and the  assistance  of the  Seller  and the  Purchaser  for
purposes of performing his duties and exercising his rights hereunder,  provided
that the Seller's Representative shall treat

                                       32

<PAGE>

confidentially  and not disclose to anyone (other than the Seller and the Parent
Shareholders) any priorietory  nonpublic information obtained from the Purchaser
after the Closing to the extent  such  proprietory  information  belongs to, and
relates to the conduct of the business of, the Company; provided,  however, that
the Seller's Representative may disclose such proprietary information:  (i) on a
need to know  basis  to  individuals  who  agree,  in  writing,  to  treat  such
information as confidential, and (ii) as required by law or regulation.


     (c) A decision,  act, consent or instruction of the Seller's Representative
shall  constitute a decision of the Seller or the Parent  Shareholders and shall
be final,  binding and  conclusive  upon the Seller and the  Purchaser,  and the
Escrow   Agent  may  rely  upon  any  written   instruction   of  the   Seller's
Representative as being the decision, act, consent or instruction of the Seller.
The  Purchaser is hereby  relieved from any liability to any person for any acts
done  by it in  accordance  with  such  written  instructions  of  the  Seller's
Representative.


                                   ARTICLE VI

            CONDITIONS TO OBLIGATIONS OF THE PURCHASER AND THE SELLER


               The obligations of the Purchaser and the Seller to consummate the
stock  purchase  contemplated  by this  Agreement  on the Closing  Date shall be
subject to the  satisfaction  of the following  condition,  except to the extent
such condition is waived in writing by the Purchaser and the Seller:

     6.1.  Government  Approvals.   All  requisite  governmental  approvals  and
authorizations necessary for the consummation of the stock purchase contemplated
hereby  shall have been duly  issued or  granted,  except  where the  failure to
obtain  such  approvals  and  authorizations  would not have a Material  Adverse
Effect on the Purchaser. No unfavorable governmental decree or court order shall
exist that would prevent the consummation of the stock purchase  contemplated by
this Agreement.


                                   ARTICLE VII

                   CONDITIONS TO OBLIGATIONS OF THE PURCHASER

          The   obligation  of  Purchaser  to  consummate   the  stock  purchase
contemplated  by this  Agreement  on the  Closing  Date  shall be subject to the
following  conditions,  except to the extent such  conditions  are waived by the
Purchaser in writing:

     7.1. Representations and Warranties;  Performance.  The representations and
warranties  of  the  Seller  set  forth  in  this   Agreement   (excluding   any
representation  or  warranty  that  refers  specifically  to  "the  date of this
Agreement,"  "the date  hereof" or any other date other than the  Closing  Date)
shall be accurate in all material  respects as of the Closing Date as if made on
and  as of  the  Closing  Date  (it  being  understood  that,  for  purposes  of
determining  the  accuracy  of such  representations  and  warranties  as of the
Closing Date (i) any inaccuracies that, in the aggregate, do not have a Material
Adverse Effect on the Company shall be disregarded, (ii) any inaccuracy that

                                       33
<PAGE>

results  from or relates to general  business,  economic or industry  conditions
shall be  disregarded,  and (iii) any inaccuracy that results from or relates to
the taking of any action  contemplated  or  permitted  by this  Agreement or the
announcement  or pendency of the  transactions  contemplated  by this  Agreement
shall be disregarded).  The Seller and the Company shall have each performed and
complied in all material  respects with all agreements or covenants  required by
this  Agreement to be performed or complied  with by such parties prior to or at
the Closing  (except  where the failure to have  performed or complied with such
agreements  would not have a Material  Adverse  Effect on the  Purchaser  or the
Company).


     7.2.  Amendments to Employment  Agreements.  Each of the Individual  Parent
Shareholders  shall have entered into an amendment to his  Employment  Agreement
with the Company substantially in the form set forth on Exhibit 7.2 hereto.


     7.3.  Opinion of Counsel.  The Purchaser  shall have received an opinion of
Advocate,  Zeev May, counsel to the Company and the Seller, in substantially the
form of Exhibit 7.3 hereto.


     7.4. Approvals. The following approvals,  orders or permits shall have been
received in form and substance reasonably satisfactory to the Purchaser:


          (a) Israel Chief Scientist. Approval of the Chief Scientist for change
in control of the Company; and

          (b) Israel  Investment  Center.  Approval of the Investment Center for
change in control of the Company.

     7.5. Escrow Agreement.  The Escrow Agent, the Seller's  Representative  and
the Seller shall have executed and delivered the Escrow Agreement.

     7.6.  Seller's  Agreement.  The Seller and each of the Parent  Shareholders
shall have  executed and  delivered  to the  Purchaser  the  Seller's Agreement.

     7.7.  Parent  Shareholders   Indemnity   Agreement.   Each  of  the  Parent
Shareholders  shall  have  executed  and  delivered  to the  Purchaser  a Parent
Shareholders Indemnity Agreement  substantially in the form set forth on Exhibit
7.7 hereto (the "Parent Shareholders Agreement").

     7.8. No Litigation.  No material  action or proceeding by any  governmental
authority in the United States or the State of Israel that  challenges the stock
purchase  contemplated  by this Agreement shall be pending against the Purchaser
or the Company.

     7.9. Change in Condition. Since the date of this Agreement, there shall not
be any change in the  Company's  financial  condition  or results of  operations
which has had or would  reasonably be expected to have a Material Adverse Effect
on the Company; provided,  however, that any change that results from or relates
to general business,  economic or industry conditions,  the taking of any action
contemplated  or permitted by this Agreement or the  announcement or 

                                       34
<PAGE>

pendency of the  transactions  contemplated by this Agreement shall not be taken
into  account  in  determining  whether  there has been or would  reasonably  be
expected to be a "Material Adverse Effect" on the Company.

     7.10.  Resignations.  All directors of the Company and its Subsidiaries and
Holdings  shall have  executed and delivered to the  Purchaser  resignations  as
directors.


                                   ARTICLE VIII

                     CONDITIONS TO OBLIGATIONS OF THE SELLER


         The  obligations  of  the  Seller  to  consummate  the  stock  purchase
contemplated  by this  Agreement  on the  Closing  Date  shall be subject to the
following  conditions,  except to the extent such  conditions  are waived by the
Seller in writing:


     8.1. Representations and Warranties;  Performance.  The representations and
warranties  of  the  Purchaser  set  forth  in  this  Agreement  (excluding  any
representation  or  warranty  that  refers  specifically  to  "the  date of this
Agreement,"  "the date  hereof" or any other date other than the  Closing  Date)
shall be accurate in all material  respects as of the Closing Date as if made on
and  as of  the  Closing  Date  (it  being  understood  that,  for  purposes  of
determining  the  accuracy  of such  representations  and  warranties  as of the
Closing Date (i) any inaccuracy that does not have a Material  Adverse Effect on
the Purchaser  shall be  disregarded,  (ii) any inaccuracy  that results from or
relates  to  general  business,   economic  or  industry   conditions  shall  be
disregarded, and (iii) any inaccuracy that results from or relates to the taking
of any action contemplated or permitted by this Agreement or the announcement or
pendency  of  the   transactions   contemplated   by  this  Agreement  shall  be
disregarded).  The Purchaser  shall have  performed and complied in all material
respects  with all  agreements  or  covenants  required by this  Agreement to be
performed or complied with by it prior to or at the Closing.  Without limitation
of the foregoing,  the Seller shall have received the cash amount referred to in
Section  1.4(b)(ii)(A)  hereof and the shares of Purchaser Common Stock referred
to in Section 1.4(b)(ii)(B) hereof, and the Escrow Agent shall have received the
shares of Purchaser Common Stock referred to in Section 1.4(b)(ii)(C) hereof.


     8.2.  Opinion of  Counsel.  The Seller  shall have  received  an opinion of
Morrison & Foerster LLP, counsel to the Purchaser,  in substantially the form of
Exhibit 8.2 hereto.

     8.3. Approvals. The following approvals, orders and permits shall have been
received in form and substance reasonably satisfactory to the Company:


          (a) Bank of  Israel.  Bank of  Israel  permit  (i) for the  Seller  to
exchange  the  Transferred  Company  Shares  and  Holdings  Shares for shares of
Purchaser  Common Stock and to hold shares of Purchaser  Common Stock,  and (ii)
for the  Seller  and the Parent  Shareholders  to deposit in a foreign  currency
deposit account ("PAMACH") the consideration received from the sale of shares of
Purchaser Common Stock;


          (b) Israel Chief  Scientist.  Approval of the Chief  Scientist for the
change in control of the Company; and

                                       35
<PAGE>

          (c) Israel  Investment  Center.  Approval of the Investment Center for
the change in control of the Company.

     8.4.  Escrow  Agreement.  The  Escrow  Agent and the  Purchaser  shall have
executed and delivered to the Seller and the Seller's  Representative the Escrow
Agreement.

     8.5. Seller's Agreement. The Purchaser shall have executed and delivered to
the Seller and the Parent Shareholders the Seller's Agreement.


     8.6. No Litigation.  No material  action or proceeding by any  governmental
authority in the United States or the State of Israel that  challenges the stock
purchase contemplated by this Agreement shall be pending against the Seller, the
Company or any of the Parent Shareholders.

     8.7. Change in Condition. Since the date of this Agreement, there shall not
be any change in the  Purchaser's  financial  condition or results of operations
which has had or would  reasonably be expected to have a Material Adverse Effect
on the  Purchaser;  provided,  however,  that any change  that  results  from or
relates to general business,  economic or industry conditions, the taking of any
action  contemplated  or permitted  by this  Agreement  or the  announcement  or
pendency of the  transactions  contemplated by this Agreement shall not be taken
into  account  in  determining  whether  there has been or would  reasonably  be
expected to be a "Material Adverse Effect" on the Purchaser.



                                   ARTICLE IX

                                FEES AND EXPENSES


     9.1. Expenses. Each of the Company, the Purchaser and the Seller shall bear
its own expenses incurred in connection with the negotiation and consummation of
the transactions contemplated by this Agreement;  provided, however, that if the
Closing takes place, (i) the Purchaser shall pay $1,701,230 of any such expenses
payable by the Company to Hambrecht & Quist LLC and payable to the Seller's U.S.
attorneys,  (ii) the Company shall pay $200,000 of other transaction expenses of
the Seller  and/or the  Company,  and (iii) the Seller  shall pay all  remaining
transaction expenses of the Company.



                                    ARTICLE X

                                   TERMINATION

     10.1.  Termination  of  Agreement.  This  Agreement  and  the  transactions
contemplated  hereby may be  terminated  at any time before the Closing Date, as
follows, and in no other manner:

          (a) by written consent of the Purchaser, the Company and the Seller;


                                       36
<PAGE>

          (b) by the  Purchaser,  the Company or the Seller if the Closing shall
not have  occurred on or before 5:00 p.m.,  Tel Aviv Time, on September 9, 1997;
provided that the right to terminate this Agreement  under this Section  10.1(b)
shall not be  available  to any party whose  failure to fulfill  any  obligation
under this  Agreement  has been the cause of, or results  in, the failure of the
Closing to have occurred by such time;


          (c) by the Purchaser,  if (i) there has been a material  breach of any
representation,  warranty,  covenant or agreement contained in this Agreement on
the part of the Seller such that the  conditions set forth in Section 7.1 hereof
could not be  satisfied,  and (ii) such breach has not been cured within  thirty
(30) days after the delivery to the Seller by the Purchaser of written notice of
such breach; provided, however, that the right to terminate this Agreement under
this Section  10.1(c)  shall not be available to the  Purchaser if the Purchaser
shall have materially breached this Agreement;


          (d) by the  Company  or the  Seller if (i)  there has been a  material
breach of any representation,  warranty, covenant or agreement contained in this
Agreement on the part of the  Purchaser  such that the  conditions  set forth in
Section  8.1 hereof  could not be  satisfied,  and (ii) such breach has not been
cured within  thirty (30) days after the delivery to the Purchaser by the Seller
of written notice of such breach; provided, however, that the right to terminate
this Agreement  under this Section 10.1(d) shall not be available to the Company
or the Seller if the Company or the Seller shall have  materially  breached this
Agreement; or


          (e) by the Purchaser,  the Company or the Seller if (i) there shall be
a final,  non-appealable  order or temporary order (which  temporary order shall
only  provide a basis for  termination  if not  reversed,  vacated or  otherwise
expired  prior  to  September  9,  1997)  of  any  court  in  effect  preventing
consummation of the  transaction,  or (ii) there shall be any action taken after
the date of this Agreement,  or any statute,  rule, regulation or order enacted,
promulgated  or issued by any  governmental  entity and  reasonably  determined,
after the date of this Agreement,  to be applicable to the stock purchase herein
contemplated which would make such stock purchase illegal.


     10.2.  Effect  of  Termination.  In the  event  of a  termination  of  this
Agreement by any party  pursuant to Section 10.1,  this  Agreement  shall become
void and have no effect,  and there shall be no  obligations or liability on the
part of any party or their respective officers and directors, except (a) Article
XI hereof shall survive the termination of this Agreement and (b) nothing herein
shall relieve any party from  liability for any willful breach of this Agreement
or any  representation  or warranty  contained  herein.  No  termination of this
Agreement  shall  affect  the  obligations  of  the  parties  contained  in  the
Confidentiality Agreement, which shall survive any termination of this Agreement
in accordance with its terms.



                                   ARTICLE XI

                                  MISCELLANEOUS

     11.1.    Time of the Essence.  Time is of the essence of this Agreement.


                                       37

<PAGE>

     11.2.  Entire  Agreement.  This Agreement and the other written  agreements
contemplated  or described  herein  contain the entire  agreement of the parties
hereto,  and  supersede  any  prior  written  or oral  agreements  between  them
concerning  the  subject  matter  contained  herein  and  therein.  There are no
representations,  agreements,  arrangements or understandings,  oral or written,
between  the  parties  to this  Agreement  and such  other  written  agreements,
relating to the subject  matter  contained in this  Agreement  and in such other
written agreements, which are not fully expressed herein and therein.


     11.3.  Press Releases and Public  Announcements.  None of the Company,  the
Seller  and the  Purchaser  shall  issue any press  release  or make any  public
announcement  concerning the matters set forth in this Agreement  (other than as
required by applicable disclosure rules or regulations of any governmental body)
without  the  consent of the other  party.  If any party  hereto is  required by
disclosure  rules  or  regulations  to  issue a press  release  or make a public
announcement  concerning  the  matters set forth in this  Agreement,  such party
shall provide  notice to the other parties of such rule or regulation  and shall
consult with such other  parties  prior to issuing such press  release or making
such  public  announcement.  The  Company,  the  Seller and the  Purchaser  will
cooperate to jointly  prepare and issue any press release which may be issued to
announce  the signing of this  Agreement  and/or the Closing of the  transaction
contemplated by this Agreement.

     11.4.  Counterparts.  This  Agreement  may be  executed  in any  number  of
counterparts,  each of which shall be deemed an original  but all of which shall
constitute one and the same instrument.

     11.5.  Descriptive  Headings.  The  Article  and  Section  headings in this
Agreement  are for  convenience  only and  shall  not  affect  the  meanings  or
construction of any provision of this Agreement.

     11.6.  Notices.  Any notices  required or  permitted to be given under this
Agreement  shall be in writing and shall be deemed  sufficiently  given (a) when
delivered in person,  (b) three  business days after  delivery to an "overnight"
courier,  (c) 24 hours after delivery by facsimile  transmission  (to the extent
receipt  of such  facsimile  is  evidenced  by a  transmission  report  or other
reasonable evidence of the successful and accurate transmission of such notice),
in each case addressed as follows:

         If to the Purchaser:      Cylink Corporation                   
`                                  910 Hermosa Court
                                   Sunnyvale, California 94086
                                   Attention:     Robert F. Fougner
                                   Fax: (408) 774-4952
                                  
         With a copy to:           Morrison & Foerster LLP
                                   755 Page Mill Road
                                   Palo Alto, California  94304-1018
                                   Attention:   Michael C. Phillips
                                  
                                         38
                                  
<PAGE>                            
                                  
                                   Fax: (650) 494-0792
                                  
         With a further copy to:   I. Fischer & Co.
                                   3 Daniel Frisch Street
                                   Tel Aviv, Israel
                                   Attention: Ezra Katzen
                                   Fax: 972-3-525-0141
                                  
                                  
         And if to the Seller:     A.R. Data Security Ltd.          
                                   c/o Algorithmic Research Ltd.
                                   15 Gush Etzion Street
                                   Givat Shmuel, Israel
                                   Attention: Yossi Tulpan
                                   Fax: 972-3-532-2650
                                   
                                   
         With a copy to:           Cooley Godward LLP
                                   Five Palo Alto Square
                                   3000 El Camino Real
                                   Palo Alto, California 94306
                                   Attention: Richard E. Climan
                                              Keith A. Flaum
                                   Fax: (650) 857-0663
                                  
         With a further copy to:   Shinar, Shachor, Weissberger
                                   5 Beit Hillel St., 3rd Floor
                                   Tel Aviv 67017, Israel
                                   Attention: Doron Shinar
                                   Fax: 972-3-562-1905
                                  
                                
or to  such  other  address  or  addresses  as a  party  shall  have  previously
designated by notice to the sender given in accordance with this Section.


     11.7.  Choice of Law;  Arbitration.  This  Agreement  shall be construed in
accordance  with and  governed  by the laws of the State of  California,  except
insofar  as Israeli  corporate  laws,  securities  laws or tax laws apply to the
Company, its Israeli Subsidiaries, the Seller, their governance, and issuance of
securities.  Any dispute  arising out of or relating to this Agreement  shall be
resolved  through  binding  arbitration  under  the  Rules of  Conciliation  and
Arbitration  of the  International  Chamber  of  Commerce.  The  venue  for such
arbitration  proceedings  shall be London,  England.  The arbitrator's  fees and
other related  expenses of any  arbitation  (such as  transcript  fees) shall be
borne by the Seller and the Purchaser in such proportions as shall be determined
by the  arbitrator,  or if there is no such  determination,  such fees and other
related  expenses  shall be borne equally by the Seller and the  Purchaser.  The
resolution of a dispute by the  arbitrator  shall be conclusive and binding upon
the  parties  hereto and  judgment  may be entered  thereon in any court  having
jurisdiction  thereof.  The arbitrator shall have the authority to make an award
of actual compensatory damages incurred by a party in connection with a dispute,
but shall  have no right to grant  special,  punitive  or  exemplary  damages or
indirect or consequential damages or to grant any form of equitable relief.

                                       39

<PAGE>

     11.8. Binding Effect;  Benefits.  This Agreement shall inure to the benefit
of and be binding upon the parties and their respective successors and permitted
assigns. Nothing in this Agreement, express or implied, is intended to confer on
any person other than the parties or their  respective  successors and permitted
assigns any rights,  remedies,  obligations or liabilities under or by reason of
this  Agreement,  except that the provisions of Sections 4.9 and 4.11 hereof and
Article V hereof are  intended  to confer  rights and  remedies  on the  persons
referred to therein.

     11.9. Assignability.  Neither this Agreement nor any of the parties' rights
hereunder  shall be assignable by any party without the prior written consent of
the other  parties and any  attempted  assignment  without such consent shall be
void; provided, however, that this Agreement may be assigned by the Purchaser to
an  affiliate of the  Purchaser  which shall have been formed for the purpose of
consummating the transactions  contemplated hereby, but no such assignment shall
relieve the Purchaser of any of its obligations under this Agreement.

     11.10. Waiver and Amendment. Any term or provision of this Agreement may be
waived at any time by the party which is entitled to the benefits  thereof.  The
waiver by any party of a breach of any  provision  of this  Agreement  shall not
operate or be construed as a waiver of any subsequent  breach.  The parties may,
by mutual agreement in writing,  amend this Agreement in any respect without the
consent or approval of any other person  (including any other beneficiary of any
rights or remedies under this Agreement).

     11.11  Attorneys' Fees. In the event of any action or proceeding to enforce
the terms and  conditions  of this  Agreement,  the  prevailing  party  shall be
entitled to an award of reasonable  attorneys'  and experts' fees and costs,  in
addition to such other relief as may be granted.

     11.12. Knowledge.  For  purposes of this  Agreement,  any  reference to the
"knowledge" of the Purchaser shall mean the actual  knowledge of Fernand Sarrat,
John V. Kalb or Robert B. Fougner of (i) an actual inaccuracy in any warranty or
representation of the Purchaser that is subject to a "knowledge"  qualification,
or (ii) facts or  circumstances  that would reasonably be expected to constitute
or to have given rise to an inaccuracy  in any such warranty or  representation.
For purposes of this Agreement,  any reference to the "knowledge" of the Company
shall mean the actual knowledge of Amos Fiat, Yossi Tulpan or Yossi Cohen of (i)
an actual  inaccuracy in any warranty or  representation  of the Company that is
subject to a  "knowledge"  qualification,  or (ii) facts or  circumstances  that
would  reasonably  be  expected  to  constitute  or to  have  given  rise  to an
inaccuracy in any such warranty or representation.

     11.13.  Other   Definitions.   "Material  Adverse  Effect,"  when  used  in
connection with the Company,  means any effect that is materially adverse to the
business or financial condition of the Company and its Subsidiaries,  taken as a
whole;  provided,  however,  that (i) any adverse  effect that  results  from or
relates to general business, economic or industry conditions shall not be deemed
to constitute,  and shall not be taken into account in determining whether there
has been, a "Material  Adverse  Effect" on or with  respect to the Company,  and
(ii) any adverse effect that results from or relates to the taking of any action
contemplated  or permitted by this Agreement or the  announcement or pendency of
the  transactions  contemplated  by  this  Agreement  shall  not  be  deemed  to
constitute, and shall not be taken into account in determining whether there has
been, a

                                       40
<PAGE>

"Material  Adverse Effect" on or with respect to the Company.  "Material Adverse
Effect," when used in connection  with the  Purchaser,  means any effect that is
materially  adverse to the business or financial  condition of the Purchaser and
the Purchaser  Subsidiaries,  taken as a whole; provided,  however, that (i) any
adverse  effect that  results from or relates to general  business,  economic or
industry  conditions  shall not be deemed to constitute,  and shall not be taken
into account in determining  whether there has been, a "Material Adverse Effect"
on or with respect to the  Purchaser,  and (ii) any adverse  effect that results
from or relates to the taking of any action  contemplated  or  permitted by this
Agreement or the  announcement or pendency of the  transactions  contemplated by
this Agreement  shall not be deemed to  constitute,  and shall not be taken into
account in determining whether there has been, a "Material Adverse Effect" on or
with  respect to the  Purchaser  . An  "agreement,"  "arrangement,"  "contract,"
"commitment,"  "plan,"  "understanding,"  or  "undertaking"  when  used  in this
Agreement shall mean a legally binding, written or oral agreement,  arrangement,
contract, commitment, plan, purchase order, understanding or undertaking, as the
case may be.

     11.14. No Implied Representations. The Purchaser and the Seller acknowledge
that,  except as expressly provided in Articles II and III hereof, and except as
expressly  provided in any agreement executed and delivered by a party hereto to
any other party hereto pursuant to this Agreement,  none of the parties has made
or is making any representations or warranties whatsoever, implied or otherwise.
Without  limiting the generality of the foregoing,  none of the parties has made
or is making any  representations  or warranties with respect to any information
or documents made available by a party or its  representatives  to another party
or its  representatives,  except as  expressly  covered by a  representation  or
warranty  in Articles II or III hereof or in any other  agreement  executed  and
delivered by a party to another party pursuant to this Agreement.

     11.15.  Liquidation of the Seller.  The Purchaser  acknowledges  and agrees
that  nothing  contained  in this  Agreement  or in any  document  delivered  in
connection with the transactions contemplated hereby shall be construed or shall
operate to prevent  the Seller  from  dissolving,  winding  up,  liquidating  or
terminating  its  existence  at any  time  after  the  Closing.  Notwithstanding
anything  to the  contrary  contained  in this  Agreement,  in the  event of the
dissolution  or  liquidation of the Seller,  the Parent  Shareholders  and their
successors  and assigns  shall succeed to, and shall be entitled to exercise and
enforce,  all of the rights of the Seller  under  this  Agreement  and the other
documents delivered in connection with the transactions contemplated hereby. The
Parent Shareholders will, as a condition to such dissolution and liquidation, be
bound by Sections 1.2(b), 4.7, 4.13, 9.1, 11.3, 11.6, and 11.7 of this Agreement
as, and only to the extent,  provided  in Section 10 of the Parent  Shareholders
Agreement.

     11.16.  Post-Closing  Access.  At all times  after the  Closing  Date,  the
Purchaser  shall  give the  Seller and the  Seller's  Representative  reasonable
access to the books and  records of the  Company  and its  Subsidiaries  (to the
extent such books and records  relate to the period prior to the Closing  Date),
and the Purchaser shall cause such books and records to be retained for a period
of at least seven years following the Closing.


                                       41
<PAGE>

         IN WITNESS  WHEREOF,  this  Agreement  has been executed by the parties
hereto as of the day and year first above written.

                       PURCHASER:

                       Cylink Corporation


                       By: /s/ John V. Kalb, Jr.
                           ---------------------------------
                               John V. Kalb, Jr.
                               Vice President, Strategy and Development

                       THE COMPANY:

                       Algorithmic Research Ltd.

                       By: /s/ Yossi Tulpan
                           ---------------------------------
                               Yossi Tulpan
                               Chief Executive Officer

                       By: /s/ Yossi Cohen
                           ---------------------------------
                               Yossi Cohen
                               Chief Operating Officer
                                   


                       THE SELLER:

                       A.R. Data Security Ltd.

                       By: /s/ Yossi Tulpan
                           ---------------------------------
                               Yossi Tulpan
                               Director

                       By: /s/ Yossi Cohen
                           ---------------------------------
                               Yossi Cohen
                               Director

                       By: /s/ Amos Fiat
                           ---------------------------------
                               Amos Fiat
                               Director

                       By: /s/ Oded Koritshoner
                           ---------------------------------
                               Oded Koritshoner
                               Director

                       By: /s/ Zohar Tal
                           ---------------------------------
                               Zohar Tal
                               Director

                                       42



                                ESCROW AGREEMENT


         THIS ESCROW AGREEMENT ("Agreement") is made as of September 8, 1997, by
and among CYLINK CORPORATION,  a California corporation (the "Purchaser"),  A.R.
DATA SECURITY LTD., a limited liability company organized and existing under the
laws  of  the  State  of  Israel  ("Seller"),  ADV.  ZE'EV  MAY  (the  "Seller's
Representative"),  and  HAMBRECHT  & QUIST  LLC, a  Delaware  limited  liability
company (the "Escrow Agent").

                                    RECITALS

         A.  Contemporaneously  with  the  execution  of  this  Agreement,   the
Purchaser  is  acquiring  from the Seller  (i) all of the shares of  Algorithmic
Research Ltd., a limited liability company organized and existing under the laws
of the State of Israel (the "Company"),  that are owned by the Seller,  and (ii)
all of the  outstanding  shares of Algart  Holdings  Ltd.,  a limited  liability
company   organized  and  existing  under  the  laws  of  the  State  of  Israel
("Holdings"),  pursuant to that certain  Stock  Purchase  Agreement  dated as of
September  7,  1997,  among the  Purchaser,  the  Company  and the  Seller  (the
"Purchase Agreement").

         B. As part of the purchase  price for the shares being  acquired by the
Purchaser pursuant to the Purchase  Agreement,  the Purchaser is issuing a total
of 2,593,169  shares of its common stock, of which 1,272,300 shares (the "Escrow
Shares") are being deposited in escrow in accordance  with this  Agreement.  The
execution of this Agreement is required by Sections  1.4(b),  7.5 and 8.4 of the
Purchase Agreement.

         C. Capitalized  terms used herein and not otherwise defined herein have
the meanings assigned to them in the Purchase Agreement.

                                    AGREEMENT

         The parties hereto agree as follows:

         1. ESTABLISHMENT OF ESCROW.

         The  Purchaser  has  delivered to the Escrow Agent and the Escrow Agent
acknowledges  receipt  of the  Escrow  Shares  in the  form  of a  single  stock
certificate  issued in the name of the Escrow Agent.  The Escrow Shares shall be
held in escrow in accordance with the provisions of this Agreement. The Seller's
Representative  shall be entitled  to direct the Escrow  Agent  through  written
instructions  as to the exercise of all voting rights with respect to the Escrow
Shares. The Purchaser shall furnish directly to the Seller's  Representative all
notices,  reports and other documents that it furnishes to its shareholders,  at
the same time that it  furnishes  such  notices,  reports and  documents to such
shareholders. In addition, the Escrow Agent shall furnish


                                        1

<PAGE>

to the Seller's Representative all notices, reports and other documents received
by the Escrow Agent as record  holder of the Escrow  Shares  promptly  after the
Escrow Agent receives such notices, reports and other documents.

         2.       SALE OF ESCROW SHARES.

         Subject to compliance  with the  applicable  provisions of the Seller's
Agreement,  the Seller's  Representative  shall be entitled from time to time in
his sole discretion (and without having to obtain the consent or approval of the
Purchaser  or any other  Person) to direct  the Escrow  Agent to sell all or any
number  of the  Escrow  Shares.  Upon the  Escrow  Agent's  receipt  of  written
instructions  from the Seller's  Representative to sell all or any number of the
Escrow Shares,  the Escrow Agent shall take all actions necessary or appropriate
to cause such sale to occur at the earliest  practicable date in accordance with
such  instructions.  The net cash proceeds received by the Escrow Agent upon the
sale of any Escrow  Shares shall remain in escrow and shall be invested (in U.S.
dollar-denominated investments) in such manner as may be specified in writing by
the Seller's Representative from time to time. (The Escrow Shares, together with
the net cash proceeds from any sale of any Escrow  Shares  effected  pursuant to
this Section 2 (but  excluding  any amounts  required to be  distributed  to the
Seller's  Representative  pursuant to Section 3 hereof), shall be referred to in
this Agreement as the "Escrow Fund.")

         3.       AMOUNTS EARNED ON ESCROW FUND.

         All amounts earned on the Escrow Fund (including all interest  received
on any  interest-bearing  investments)  shall  be  distributed  to the  Seller's
Representative  from time to time (without deductions or set-offs of any nature)
promptly  after such amounts are received by the Escrow Agent.  All dividends or
other  distributions of cash,  securities (other than shares of Purchaser Common
Stock  issued  with  respect  to the  Escrow  Shares  as a stock  split or stock
dividend) or other property in respect of any of the Escrow Shares shall be paid
in full (without  deductions or set-offs of any nature) directly to the Seller's
Representative  by the Purchaser  promptly  after the payment dates for any such
dividends  or other  distributions  (and,  in the  event any such  dividends  or
distributions  are paid or made to the  Escrow  Agent,  the Escrow  Agent  shall
promptly (and without having to obtain the consent or approval of the Purchaser)
pay such dividends or other distributions (without deductions or set-offs of any
nature) to the Seller's  Representative).  The parties agree that, to the extent
required by  applicable  law, the Seller will include all amounts  earned on the
Escrow  Fund in its gross  income for Israeli  and other  applicable  income tax
purposes and pay any income tax resulting therefrom. Any risk of loss arising on
the  basis  of any  investment  decision  made  by the  Seller's  Representative
pursuant to Section 2 hereof (i.e.,  the risk of a decline in principal value of
an  investment  made with the net  proceeds  from the sale of  Escrow  Shares in
accordance with Section 2 hereof) shall be borne by the Seller, to the exclusion
of the Purchaser and the Escrow Agent (it being  understood,  however,  that the
Seller shall not be responsible for restoring the amount of any such loss).  The
Escrow Agent shall,  with  reasonable  promptness,  give notice to the Purchaser
after making any

                                        2

<PAGE>

distribution pursuant to this Section 3.

         4.       CLAIMS AGAINST ESCROW FUND.

                  (a) At any time or time  prior  to the  Expiration  Date,  the
Purchaser may make  indemnification  claims  against the Escrow Fund for amounts
due to  the  Purchaser  for  indemnification  under  Article  V of the  Purchase
Agreement.  If the Purchaser wishes to make any such  indemnification  claim, it
shall duly deliver to the Seller's  Representative  and the Escrow Agent a Claim
Notice in accordance with Section 5.7 of the Purchase Agreement and this Section
4(a). Each such Claim Notice shall set forth:

                           (i) a representation from the Purchaser to the effect
that the  Purchaser  has  delivered a copy of such Claim  Notice to the Seller's
Representative prior to or simultaneously with its delivery to the Escrow Agent;

                           (ii) the specific  representation and warranty in the
Purchase Agreement alleged to have been breached by the Seller;

                           (iii) a summary of the facts and circumstances giving
rise to the alleged  breach of such  representation  and warranty by the Seller;
and

                           (iv) a description  of, and a reasonable  estimate of
the total amount of, the Damages actually incurred or expected to be incurred by
the Purchaser as a result of such alleged breach.

If a Claim Notice shall not have been  delivered to the Seller's  Representative
and the Escrow Agent on or prior to the Expiration  Date, then such Claim Notice
shall not be deemed to have been delivered and shall be of no force or effect.

                  (b)  Within  sixty  (60) days  after the  delivery  of a Claim
Notice to the Seller's  Representative  and the Escrow Agent in accordance  with
Section 5.7 of the Purchase  Agreement  and Section  4(a)  hereof,  the Seller's
Representative  may, in its sole  discretion,  deliver to the  Purchaser and the
Escrow Agent a written notice (the "Response Notice") containing (i) a statement
substantially  to the effect that the  indemnification  claim  described in such
Claim  Notice is not being  disputed  and a portion of the Escrow  Fund equal in
value to the entire  dollar amount of Damages set forth in such Claim Notice may
accordingly be distributed  from escrow to the Purchaser in accordance  with the
terms of this  Agreement,  (ii) a statement  substantially  to the effect that a
portion of the Escrow  Fund equal in value to a portion of the dollar  amount of
Damages  (but not the entire  dollar  amount of Damages) set forth in such Claim
Notice is to be distributed  from escrow to the Purchaser in accordance with the
terms of this Agreement,  and that the remaining portion of the dollar amount of
Damages set forth in such Claim Notice is being disputed  (specifying the dollar
amount of the portion that is not being disputed), or (iii)a


                                        3

<PAGE>

statement  substantially  to the effect that the entire dollar amount of Damages
set forth in such Claim  Notice is being  disputed.  (Any  portion of the dollar
amount of such Damages that is not being disputed by the Seller's Representative
shall be referred  to in this  Agreement  as the  "Undisputed  Amount,"  and the
remaining  portion of such Damages shall be referred to in this Agreement as the
"Disputed  Amount.") If no Response  Notice is delivered  within sixty (60) days
after the  delivery of a Claim  Notice to the  Seller's  Representative  and the
Escrow  Agent,  then  the  Seller's  Representative  shall be  deemed  not to be
disputing the Damages described in the Claim Notice,  and in such event the term
"Undisputed  Amount" shall be deemed to refer to the entire dollar amount of the
Damages  set forth in the Claim  Notice  (and,  accordingly,  in such  event the
"Disputed  Amount" of the  indemnification  claim described in such Claim Notice
shall be zero).

                  (c) If the Seller's  Representative  is disputing or is deemed
to be disputing all or any portion of the dollar amount of the Damages set forth
in a Claim Notice,  then no distribution of any portion of the Escrow Fund shall
be made by the Escrow Agent to the Purchaser with respect to the Disputed Amount
until  either (i) a  settlement  agreement  executed  by the  Purchaser  and the
Seller's  Representative  containing a settlement of the  indemnification  claim
described in such Claim Notice (and  specifying the  respective  amounts of cash
(if any) and Escrow Shares (if any) to be  distributed to the Purchaser from the
escrow)  shall  have  been  delivered  to the  Escrow  Agent,  or  (ii) a  final
arbitration  award (made  pursuant to the  arbitration  procedures  set forth in
Section   4(d)   hereof)   containing  a  final   binding   resolution   of  the
indemnification  claim described in such Claim Notice (and specifying the amount
of the  Damages  (if any) with  respect to which the  Purchaser  is  entitled to
indemnification)  (an  "Arbitration  Award")  shall have been  delivered  to the
Escrow Agent.

                  (d) If (i) the Seller's  Representative is disputing or deemed
to be disputing all or any portion of the dollar amount of the Damages set forth
in a Claim  Notice,  and (ii) within ninety (90) days after the delivery of such
Claim  Notice by the  Purchaser to the  Seller's  Representative  and the Escrow
Agent in accordance with Section 5.7 of the Purchase  Agreement and Section 4(a)
hereof, the Escrow Agent has not received a settlement  agreement satisfying the
requirements  of clause "(i)" of Section 4(c) hereof,  then the  indemnification
claim  or  claims  described  in such  Claim  Notice  shall  be  referred  to an
arbitrator chosen jointly by the Seller's  Representative and the Purchaser.  If
the Seller's  Representative  and the Purchaser do not agree on the selection of
an arbitrator  within ten (10) days after the  expiration of the ninety (90) day
period  referred  to in  this  Section  4(d),  the  Purchaser  or  the  Seller's
Representative  may submit the matter in dispute  for  resolution  pursuant to a
binding  arbitration  proceeding under the Rules of Conciliation and Arbitration
of the  International  Chamber  of  Commerce.  The  venue  for such  arbitration
proceeding shall be in London,  England. The arbitrator's fees and other related
expenses  of  any  arbitration  under  this  Agreement  (such  as  expenses  for
transcripts of the arbitration proceedings) shall be borne by the Seller and the
Purchaser in such  proportions as shall be determined by the  arbitrator,  or if
there is no such determination, then such fees and other expenses shall be borne
equally by the Seller and the Purchaser; provided, however, that


                                        4

<PAGE>

subject  to  Section  4(e)  hereof,  any such fees and other  expenses  that are
required to be borne by the Seller (the "Seller's  Arbitration  Expenses") shall
be paid  (without  deductions  or set-offs of any nature) out of the Escrow Fund
(assuming there are sufficient Escrow Shares and/or cash remaining in the Escrow
Fund after  satisfaction  of any  Arbitration  Award) upon receipt by the Escrow
Agent of written instructions executed by the Seller's Representative  directing
the  Escrow  Agent  to  pay  such  Seller's  Arbitration   Expenses.   "Seller's
Arbitration  Expenses" shall not be deemed to include any costs or expenses that
constitute  "Defense Costs" for purposes of Section 8(c) hereof.  The arbitrator
shall have the authority to make an award  specifying the dollar amount (if any)
representing the portion of the Disputed Amount that is to be distributed by the
Escrow Agent to the Purchaser  from the Escrow Fund,  but shall have no right to
grant  special,  punitive or  exemplary  damages or  indirect  or  consequential
damages  or to grant any form of  equitable  relief.  The  determination  of the
arbitrator  as to the dollar  amount (if any)  representing  the  portion of the
Disputed  Amount that is payable out of the Escrow Fund shall be conclusive  and
binding upon the parties hereto and judgment may be entered thereon in any court
having  jurisdiction  thereof.  The determination of the combination of cash and
Escrow  Shares to be  distributed  to the  Purchaser to satisfy any  Arbitration
Award shall be made by the Seller's  Representative  (in accordance with Section
5(b) hereof), and not by the arbitrator.

                  (e) If (i) the Escrow  Agent has made  distributions  from the
Escrow Fund to the Seller's  Representative  in respect of Seller's  Arbitration
Expenses or Seller's  Representative  Expenses (as defined  below) in accordance
with Sections 4(d) and 8(b) hereof,  and (ii) the actual  indemnifiable  Damages
required to be paid under this  Agreement to the Purchaser  from the Escrow Fund
shall exceed the amount  available in the Escrow Fund, then the Seller shall pay
directly to the  Purchaser in cash  (following  the complete  exhaustion  of the
Escrow  Fund) an amount  equal to the  lesser  of:  (A) the  amount by which the
actual  indemnifiable  Damages  required to be paid under this  Agreement to the
Purchaser  from the Escrow Fund  actually  exceeds the amount  available  in the
Escrow Fund; or (B) the sum of the amount of any Seller's  Arbitration  Expenses
and Seller's  Representative Expenses previously paid by the Escrow Agent to the
Seller's  Representative  from the Escrow Fund in accordance  with Sections 4(d)
and 8(b) hereof.  The amount of any payment required to be made to the Purchaser
pursuant to the preceding  sentence shall be reduced by the aggregate  amount of
any payment(s) previously made pursuant to this Section 4(e).

         5.       DISTRIBUTION OF ESCROW FUND.

                  (a) As soon  as  practicable  following  the  delivery  by the
Seller's  Representative  to the  Purchaser  and the Escrow  Agent of a Response
Notice  pursuant  to clause  "(i)" or clause  "(ii)"  of the first  sentence  of
Section 4(b) hereof  containing a statement that a portion of the Escrow Fund is
to be  distributed  from  escrow  to  the  Purchaser,  the  Escrow  Agent  shall
distribute  to the  Purchaser,  from the Escrow Fund,  Escrow Shares and/or cash
having an aggregate  combined value equal to the Undisputed  Amount set forth in
such  Response  Notice.  As soon as  practicable  following  the delivery to the
Escrow Agent of a settlement agreement


                                        5

<PAGE>

executed  by  the  Purchaser  and  the  Seller's  Representative   containing  a
settlement  of a Disputed  Amount,  or the  delivery  to the Escrow  Agent of an
Arbitration Award containing a resolution of a Disputed Amount, the Escrow Agent
shall  distribute to the Purchaser,  from the Escrow Fund,  Escrow Shares and/or
cash having an aggregate combined value equal to the dollar amount identified in
such settlement  agreement or in such Arbitration  Award as being payable to the
Purchaser out of the Escrow Fund.  The number of Escrow Shares and/or the amount
of cash to be distributed from the Escrow Fund shall be determined in the manner
described in Sections 5(b) and 5(c) hereof.

                  (b) With respect to every  distribution out of the Escrow Fund
(including every  distribution  pursuant to Sections 5(a) and 6 hereof and every
distribution   in   respect   of   Seller's   Arbitration   Expenses,   Seller's
Representative  Expenses and Defense Costs), the Seller's  Representative  shall
have the exclusive right to determine whether such distribution  shall be in the
form of Escrow  Shares or cash,  or any  combination  thereof;  and,  as soon as
reasonably  practicable after the Seller's  Representative shall have determined
the form of such  distribution,  the  Seller's  Representative  shall notify the
Escrow Agent of such determination.

                  (c) To the extent  that any Escrow  Shares are  required to be
distributed to the Purchaser pursuant to the terms of this Agreement, the Escrow
Agent shall effect the  distribution  of such Escrow  Shares to the Purchaser by
surrendering the certificate  representing such Escrow Shares to the Purchaser's
transfer  agent for  cancellation  upon  receipt  by the  Escrow  Agent from the
Purchaser's  transfer  agent of a copy of a letter  from  the  Purchaser  to the
Purchaser's  transfer  agent  instructing  such  transfer  agent  to issue a new
certificate to the Escrow Agent for the number of Escrow Shares  remaining after
giving  effect  to the  distribution  of  those  Escrow  Shares  required  to be
distributed to the Purchaser.  To the extent that any Escrow Shares are required
to be distributed to the Seller's Representative (or to any Person designated by
the Seller's Representative) pursuant to the terms of this Agreement, the Escrow
Agent shall effect the  distribution of such Escrow Shares by  surrendering  the
certificate representing the Escrow Shares to the Purchaser's transfer agent and
instructing   such  transfer   agent  to  issue  and  deliver  to  the  Seller's
Representative   (or  to  such  other   Person  or   Persons  as  the   Seller's
Representative  may designate in writing) a new certificate or new  certificates
representing  the number of Escrow Shares that are required to be distributed to
the  Seller's  Representative  (or  to any  Person  designated  by the  Seller's
Representative)  and to reissue in the name of the Escrow Agent,  and to deliver
to the Escrow Agent, a certificate representing any Escrow Shares required to be
retained in escrow after giving effect to such distribution. The value per share
of the Escrow Shares for purposes of this Agreement  shall be the average of the
closing  prices of  Purchaser  Common  Stock as reported on the Nasdaq  National
Market for the ninety (90) trading days  immediately  following the Closing Date
(adjusted,  as  appropriate,  to reflect any stock split,  reverse  stock split,
stock dividend or similar  transaction).  The Escrow Agent may rely conclusively
on the per  share  value  calculated  as set forth  herein  for the  purpose  of
determining  the number of Escrow  Shares  required to be  distributed  from the
escrow  hereunder.  All  distributions  made out of the Escrow  Shares  shall be
rounded to the nearest whole share. Except


                                        6

<PAGE>

as  provided  in  Section  2 hereof,  no party  hereto  shall  have any right to
substitute  other  property for the Escrow Fund or to change the per share value
stated herein.

                  (d) To the extent that any cash is required to be  distributed
to the Purchaser or the Seller's  Representative (or to any Person designated by
the Seller's Representative) pursuant to the terms of this Agreement, the Escrow
Agent shall effect such  distribution  by  delivering  such cash directly to the
Purchaser or to the Seller's  Representative (or to such other Person or Persons
as the Seller's Representative may designate in writing), as the case may be.

         6.       TERMINATION.

         This  Agreement  shall  terminate  on the  Expiration  Date;  provided,
however,  that  (i) if,  on the  Expiration  Date,  there  are  any  outstanding
unresolved  indemnification  claims as to which the  Escrow  Agent has  received
Claim  Notices  pursuant to Section 5.7 of the Purchase  Agreement and Section 4
hereof  on or prior to the  Expiration  Date  ("Unresolved  Claims"),  then this
Agreement  shall continue in effect until the resolution of all such  Unresolved
Claims; and (ii) any obligation of the Seller (or the Parent  Shareholders after
the  liquidation  of the Seller as  provided  in Section 14 hereof)  pursuant to
Section 4(e) hereof shall survive such  termination.  On the Expiration Date (or
as soon thereafter as is practicable),  the Escrow Agent shall distribute to the
Seller's Representative (in accordance with Section 5(b) hereof) all of the cash
and Escrow Shares comprising the Escrow Fund; provided,  however, that a portion
of the Escrow  Fund equal in value to the total  dollar  amount of the  Disputed
Amounts of all Unresolved  Claims shall remain in escrow. At such time, and from
time to time,  after the  Expiration  Date as the Escrow  Agent shall  receive a
settlement  agreement executed by the Purchaser and the Seller's  Representative
containing  a  settlement  of  an  Unresolved  Claim  or  an  Arbitration  Award
containing  a  resolution  of  an  Unresolved  Claim,  the  Escrow  Agent  shall
distribute to the Purchaser (in  accordance  with Section 5(b) hereof) a portion
of the  Escrow  Fund  equal in  value to the  dollar  amount  identified  in the
settlement  agreement or Arbitration Award as being payable to the Purchaser out
of the  Escrow  Fund in respect of such  Unresolved  Claim.  All of the cash and
Escrow Shares  remaining in the Escrow Fund after  resolution of all  Unresolved
Claims shall be promptly distributed to the Seller's Representative (without the
need for any consent or approval on the part of the Purchaser).

         7.       THE ESCROW AGENT.

                  (a) All fees and  expenses of the Escrow  Agent in  connection
with its  performance of this Agreement  shall be borne and paid  exclusively by
the Purchaser  (within  thirty (30) days after receipt of  appropriate  invoices
from the Escrow Agent). Under no circumstances shall any fees, expenses or other
amounts  that may be payable  to the  Escrow  Agent be paid by the Seller or the
Seller's  Representative  or from the Escrow Fund. The Escrow Agent shall not be
liable for any act or omission to act under this  Agreement,  except for its own
gross  negligence  or willful  misconduct.  The Escrow Agent shall not be liable
for, and the


                                       7

<PAGE>

Purchaser  agrees to indemnify  the Escrow Agent for and save it harmless  from,
any claims, demands, losses or damages (including reasonable attorneys' fees and
expenses)  arising out of any action taken or omitted in good faith hereunder or
upon the advice of counsel. The Escrow Agent may decline to act and shall not be
liable for any failure to act if in doubt as to its duties under this Agreement.
The Escrow Agent may act upon any  instrument or signature  believed by it to be
genuine  and may  assume  that the  information  contained  therein  is true and
accurate  and that any  Person  purporting  to give any  notice  or  instruction
hereunder,  reasonably believed by it to be authorized, has been duly authorized
to do so. The Escrow Agent's  duties shall be determined  only with reference to
this  Agreement and  applicable  laws,  and the Escrow Agent is not charged with
knowledge  of or any duties or  responsibilities  in  connection  with any other
document or  agreement.  The Escrow Agent is hereby  authorized to disregard any
and all warnings by any of the parties hereto or by any other Person,  excepting
only orders or process of courts of law, or Arbitration  Awards made pursuant to
Section 4(d) hereof, and is hereby expressly  authorized to comply with and obey
orders,  judgments or decrees of any court or  Arbitration  Awards.  In case the
Escrow  Agent obeys or complies  with any such order,  judgment or decree of any
court or any  Arbitration  Award,  the Escrow Agent will not be liable to any of
the  parties  hereto  or to any  other  Person  by  reason  of such  compliance,
notwithstanding  the fact that any such order,  judgment,  decree or Arbitration
Award may be subsequently reversed,  modified, annulled, set aside or vacated or
found to have been entered without  jurisdiction.  The Escrow Agent shall not be
liable for fluctuations in the value of the Escrow Shares which might affect the
value of  distributions  from the Escrow  Fund.  The Escrow  Agent  shall not be
liable  in the  event  that  previous  distributions  from the  Escrow  Fund for
Seller's Arbitration Expenses, Seller's Representative Expenses or Defense Costs
result  in  insufficient  funds in the  Escrow  Fund to fully  pay any  required
distribution to the Purchaser or the Seller's Representative.

                  (b) The  Escrow  Agent  shall  have  the  right at any time to
resign  hereunder by giving  written  notice of its  resignation  to the parties
hereto,  at the  addresses  set forth  herein or at such  other  address  as the
parties shall provide, at least thirty (30) days prior to the date specified for
such  resignation  to take effect.  In such event the Purchaser and the Seller's
Representative shall jointly appoint a successor escrow agent within said thirty
(30) days;  if the Purchaser  and the Seller's  Representative  do not appoint a
successor  escrow  agent within such  period,  the Escrow Agent may appoint,  or
petition a court of competent  jurisdiction  for the appointment of, a successor
escrow agent. Upon the effective date of such resignation, the Escrow Fund shall
be delivered by the Escrow Agent to such successor  escrow agent or as otherwise
shall be  designated  in a  writing  jointly  signed  by the  Purchaser  and the
Seller's Representative.

                  (c) In the event that the Escrow  Agent  should at any time be
confronted  with  inconsistent  or conflicting  claims or demands by the parties
hereto,  the Escrow Agent shall have the right to interplead said parties in and
deposit the Escrow  Fund with any court of  competent  jurisdiction  and request
that such court determine the respective  rights of such parties with respect to
this Agreement and the Escrow Fund and, upon doing so, the Escrow Agent shall be


                                        8

<PAGE>

released  from any  obligations  or liability to any other party  hereunder as a
consequence  of any such claims or demands.  The Purchaser  shall  indemnify the
Escrow  Agent for and hold it  harmless  from any  liability  to any Person as a
result of such deposit and  interpleader  action,  including  any legal fees and
expenses incurred by the Escrow Agent in connection therewith.

                  (d)  The  Escrow  Agent  may  execute  any  of its  powers  or
responsibilities  hereunder, and exercise any rights hereunder,  either directly
or by or  through  its  agents  or  attorneys.  The  Escrow  Agent  shall not be
responsible  for and shall not be under a duty to examine,  inquire into or pass
upon the validity, binding effect, execution or sufficiency of this Agreement or
of any amendment or supplement hereto.

                  (e) The Seller  hereby agrees that it is aware of and consents
to the fact that the Escrow Agent has in the past, is now, and may in the future
represent  the  Purchaser in other  transactions  as an  underwriter,  financial
advisor,  placement  agent,  etc., in  connection  with the  investment  banking
activities of the Escrow Agent.  The Purchaser hereby agrees that it is aware of
and consents to the fact that, along with representing it in other transactions,
the Escrow  Agent has  represented  the Company in  connection  with the sale of
shares of the Company under the Purchase  Agreement.  Both the Purchaser and the
Seller  acknowledge  these conflicts of interests and potential future conflicts
of interests  and,  despite  this,  affirm  their  request that the Escrow Agent
accept its obligations pursuant to this Agreement.

         8.       SELLER'S REPRESENTATIVE.

                  (a) The  Seller's  Representative  may be changed from time to
time upon not less than 5 days' prior written  notice from the Seller or, if the
Seller has been liquidated, from any three Parent Shareholders, to the Purchaser
and the Escrow Agent.

                  (b) The Escrow Agent shall,  upon receipt from time to time of
written  instructions  executed by the Seller's  Representative  (accompanied by
copies of appropriate  invoices),  distribute  (in accordance  with Section 5(b)
hereof and  without  deductions  or  set-offs  of any  nature)  to the  Seller's
Representative   (or  to  such  other   Persons   specified   in  such   written
instructions),  out of the Escrow Fund, Escrow Shares and/or cash equal in value
to all out-of-pocket  costs and expenses (including  reasonable  attorneys' fees
and  disbursements  and reasonable  travel costs of witnesses and other Persons)
incurred  by  the  Seller's   Representative,   the  Seller  and/or  the  Parent
Shareholders in connection with this Agreement, including all costs and expenses
incurred  by the  Seller's  Representative  and/or  the Parent  Shareholders  in
connection  with  the  performance  of  the  Seller's   Representative's  duties
hereunder  and/or in connection  with any dispute  between the Purchaser and the
Seller's  Representative  with respect to any  indemnification  claim made under
Article V of the Purchase Agreement (all such  out-of-pocket  costs and expenses
being  referred to in this  Agreement  as "Seller's  Representative  Expenses").
"Seller's  Representative  Expenses" shall not be deemed to include any costs or
expenses that constitute  "Defense Costs" under Section 8(c) hereof.  No consent
or approval of the Purchaser


                                        9

<PAGE>

shall be  required  with  respect to any  distribution  to be made by the Escrow
Agent pursuant to this Section 8(b).

                  (c) If the Seller (or any of the Parent  Shareholders)  or the
Seller's  Representative elects to defend any third party claim, action, suit or
proceeding  for  which  indemnification  may be  sought  under  Article V of the
Purchase  Agreement,  the Escrow Agent shall,  upon receipt from time to time of
written  instructions  executed by the Seller's  Representative  (accompanied by
copies of appropriate  invoices),  distribute  (in accordance  with Section 5(b)
hereof and  without  deductions  or  set-offs  of any  nature)  to the  Seller's
Representative   (or  to  such  other   Persons   specified   in  such   written
instructions),  out of the Escrow Fund, Escrow Shares and/or cash equal in value
to all  out-of-pocket  costs and expenses  (including costs of investigation and
attorneys'  fees and  reasonable  travel costs of witnesses  and other  Persons)
incurred  in  connection  with the defense of any such  claim,  action,  suit or
proceeding  (such costs and expenses  shall be referred to in this  Agreement as
"Defense Costs" and shall  specifically  exclude any costs and expenses incurred
by the Seller's Representative in connection with the arbitration of any dispute
between  the  Purchaser  and the  Seller's  Representative  with  respect to the
Disputed Amount of any indemnification claim made against the Escrow Agent under
Article V of the Purchase  Agreement).  No consent or approval of the  Purchaser
shall be  required  with  respect to any  distribution  to be made by the Escrow
Agent pursuant to this Section 8(c).

         9.       GOVERNING LAW.

         This  Agreement  and the legal  relations  between the parties  arising
hereunder  shall be governed by and  interpreted in accordance  with the laws of
the State of California  without regard to its conflict of law  provisions,  and
shall inure to the benefit of and be binding upon the  successors and assigns of
the parties  hereto.  Any dispute  arising out of or relating to this  Agreement
shall be resolved through binding  arbitration in accordance with the provisions
of Section 4(d) hereof.

         10.      COUNTERPARTS.

         This  Agreement  may be  executed in one or more  counterparts,  all of
which shall be considered one and the same document.

         11.      NOTICES.

         Any notice  required  or  permitted  hereunder  shall be in writing and
shall be deemed given (a) when  delivered  in person,  (b) three  business  days
after  delivery to an  "overnight"  courier,  or (c) 24 hours after  delivery by
facsimile  transmission (to the extent receipt of such facsimile is evidenced by
a  transmission  report  or other  reasonable  evidence  of the  successful  and
accurate transmission of such notice), in each case addressed as follows:


                                       10

<PAGE>



   If To The Purchaser:                   Cylink Corporation
                                          910 Hermosa Court
                                          Sunnyvale, CA 94086
                                          Attn: Robert F. Fougner
                                          Fax: (408) 774-4952

   With copies to:                        Morrison & Foerster LLP
                                          755 Page Mill Road
                                          Palo Alto, CA 94304
                                          Attn: Michael C. Phillips
                                          Fax: (650) 494-0792


                                          I. Fischer & Co.
                                          3 Daniel Frisch Street
                                          Tel Aviv, Israel
                                          Attn: Ezra Katzen
                                          Fax: 972-3-525-0141

   If To The Seller's Representative:     Adv. Ze'ev May
                                          14, Spinoza St.
                                          Tel Aviv, Israel
                                          Fax: 972-3-5244458

   With copies to:                        Cooley Godward LLP
                                          Five Palo Alto Square
                                          3000 El Camino Real
                                          Palo Alto, CA 94304-1018
                                          Attn:    Richard E. Climan
                                                   Keith A. Flaum
                                          Fax:     (650) 857-0663

                                          Shinar, Shachor, Weissberger
                                          5 Beit Hillel Street, 3rd Floor
                                          Tel Aviv 67017, Israel
                                          Attn: Doron Shinar
                                          Fax: 972-3-562-1905

   If To The Escrow Agent:                Hambrecht & Quist LLC
                                          One Bush Street
                                          San Francisco, CA 94104
                                          Attn: Steven N. Machtinger
                                          Fax: (415) 439-3638


                                       11

<PAGE>


Addresses may be changed by written notice given  pursuant to this Section.  Any
notice given hereunder may be given on behalf of any party by his or its counsel
or other authorized representative.

         12.      ENTIRE AGREEMENT.

         This Agreement,  together with the Purchase Agreement,  constitutes the
full and entire  understanding  and  agreement  among the parties  regarding the
matters set forth herein and therein and  supersedes  all prior  agreements  and
understandings,  both written and oral, among or between any of the parties with
respect to the subject matter hereof and thereof.

         13.      AMENDMENTS AND WAIVERS.

         This Agreement may not be amended, modified or supplemented,  except in
a written  amendment signed by all parties hereto. No failure on the part of any
party to exercise any power,  right,  privilege or remedy under this  Agreement,
and no delay on the part of any party in exercising any power, right,  privilege
or remedy under this Agreement,  shall operate as a waiver of such power, right,
privilege or remedy; and no single or partial exercise of any such power, right,
privilege or remedy shall preclude any other or further  exercise  thereof or of
any other power,  right,  privilege or remedy.  No party shall be deemed to have
waived any claim arising out of this Agreement,  or any power, right,  privilege
or remedy under this Agreement,  unless the waiver of such claim,  power, right,
privilege or remedy is expressly set forth in a written instrument duly executed
and  delivered  on  behalf  of such  party;  and any such  waiver  shall  not be
applicable  or have any effect  except in the  specific  instance in which it is
given.

         14.      LIQUIDATION OF THE SELLER.

         The Purchaser  acknowledges  and agrees that nothing  contained in this
Agreement  shall be  construed  or shall  operate  to prevent  the  Seller  from
dissolving,  winding up,  liquidating or  terminating  its existence at any time
after the date hereof.  Notwithstanding  anything to the  contrary  contained in
this  Agreement,  in the event of the  dissolution  of the  Seller,  the  Parent
Shareholders  (and their  successors and assigns) shall succeed to, and shall be
entitled to exercise  and  enforce,  all of the rights of the Seller  under this
Agreement. The Parent Shareholders will,  as a condition to such dissolution and
liquidation,  be bound by  Section  4(e) of this  Agreement  as, and only to the
extent,  provided in Section 10 of that certain  Parent  Shareholders  Indemnity
Agreement of even date herewith among the Purchaser, the Parent Shareholders and
the Seller.

         15.      MISCELLANEOUS.

         For purposes of this  Agreement,  "Person"  shall mean any  individual,
corporation,


                                       12

<PAGE>



partnership,  limited  liability  company,  firm,  joint  venture,  association,
joint-stock  company,  trust,  unincorporated   organization,   governmental  or
regulatory body or other entity.


                                       13

<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the date first stated above.

                                       CYLINK CORPORATION

                                       By:  /s/ John V. Kalb, Jr.
                                            ------------------------------------
                                                John V. Kalb, Jr.
                                                Vice President, Strategy and
                                                Business Development
  
                                       SELLER'S REPRESENTATIVE

                                        /s/ Ze'ev May
                                       -----------------------------------------
                                       Adv. Ze'ev May

                                       HAMBRECHT & QUIST LLC
                                       as Escrow Agent

                                       By: /s/ Paul Cleveland
                                           -------------------------------------
                                               Paul Cleveland, Managing Director

A.R. DATA SECURITY LTD.

By  /s/ Yossi Tulpan
   ---------------------------------
        Yossi Tulpan, Director

By: /s/ Yossi Cohen
   ---------------------------------
        Yossi Cohen, Director

By: /s/ Amos Fiat
   ---------------------------------
        Amos Fiat, Director

By: /s/ Oded Koritshoner
   ---------------------------------
        Oded Koritshoner, Director

By: /s/ Zohar Tal
   ---------------------------------
        Zohar Tal, Director


                                       14


                               SELLER'S AGREEMENT


         THIS SELLER'S AGREEMENT  ("Agreement") is made as of September 8, 1997,
by and among:  CYLINK CORPORATION,  a California  corporation (the "Purchaser");
A.R.  DATA SECURITY  LTD., a limited  liability  company  organized and existing
under  the  laws  of the  State  of  Israel  (the  "Seller");  and  each  of the
shareholders  of the Seller,  all of which are  identified  on Schedule A hereto
(the "Parent Shareholders").

                                    RECITALS


         A. Contemporaneously with the execution and delivery of this Agreement,
the Purchaser is acquiring from the Seller (i) all of the issued and outstanding
shares of Algorithmic Research Ltd., a limited liability company organized under
the laws of the State of Israel (the  "Company"),  that are owned by the Seller,
and (ii) all of the issued and  outstanding  shares of Algart  Holdings  Ltd., a
limited  liability  company  organized  under  the laws of the  State of  Israel
("Holdings"),  pursuant to that certain Stock  Purchase  Agreement,  dated as of
September  7,  1997,  among the  Purchaser,  the  Company  and the  Seller  (the
"Purchase Agreement").

         B. As part of the  purchase  price for the  shares of the  Company  and
Holdings being acquired by the Purchaser pursuant to the Purchase Agreement, the
Purchaser  is  issuing  a total  of  2,593,169  shares  of  common  stock of the
Purchaser  (the  "Transaction  Shares"),  of which  1,272,300  shares  are being
deposited in escrow in accordance with the terms of the Purchase Agreement.

         C. The  Seller is in the  process  of a  voluntary  liquidation.  It is
contemplated  that,  in  connection  with the  liquidation  of the  Seller,  the
Transaction  Shares  held by the  Seller  will be  distributed  "in kind" by the
Seller to the Parent Shareholders.

         D. This Agreement is being executed and delivered  pursuant to Sections
4.6, 7.6 and 8.5 of the Purchase Agreement.

                                    AGREEMENT

         NOW,  THEREFORE,  in consideration of the mutual promises and covenants
hereinafter set forth, the parties hereto agree as follows:

         1. CERTAIN  DEFINITIONS.  All capitalized  terms used and not otherwise
defined herein shall have the meanings given to them in the Purchase  Agreement.
In  addition,  as used in this  Agreement,  the  following  terms shall have the
following respective meanings:


                                       1
<PAGE>

                  "Affiliate" shall mean, with respect to any Person,  any other
Person controlling, controlled by or under common control with such Person.

                  A "Change in Control of the Purchaser" shall be deemed to have
occurred if: (a) any Person (other than Pittway  Corporation) or "group" (within
the meaning of Rule 13d-5 under the Exchange Act) becomes the "beneficial owner"
(within the meaning of Rule 13d-3 under the Exchange Act) of at least 50% of the
voting  securities  of the  Purchaser;  (b) a merger,  consolidation  or similar
transaction  involving  the  Purchaser  or any  affiliate  of the  Purchaser  is
effected,  and the  shareholders  of the  Purchaser  immediately  prior  to such
transaction  own  less  than  60%  of the  voting  securities  of the  surviving
corporation in such  transaction;  (c) assets  representing more than 50% of the
aggregate net book value of the  Purchaser's  assets  (exclusive of its wireless
communications  division)  are sold or  otherwise  transferred  to any Person or
Persons  (in a single  transaction  or a  series  of  transactions);  or (d) the
individuals  who, as of the date of this Agreement,  are members of the Board of
Directors  of the  Purchaser  (the  "Incumbent  Board")  cease for any reason to
constitute  at least  two-thirds  of the  Board of  Directors  of the  Purchaser
(provided,  however,  that if the election,  or  nomination  for election by the
Purchaser's shareholders, of any new director was approved by a vote of at least
two-thirds of the Incumbent Board, such new director shall, for purposes of this
Agreement, be considered as a member of the Incumbent Board).

                  A "Change in Control of the  Company"  shall be deemed to have
occurred if: (a) a Person  (other than the  Purchaser)  becomes the  "beneficial
owner" (within the meaning of Rule 13d-5 under the Exchange Act) of at least 50%
of the voting  securities of the Company (other than in connection with a Change
in Control of the Purchaser);  (b) the Purchaser  ceases to own more than 50% of
the outstanding shares of the Company;  or (c) assets representing more than 50%
of the aggregate  net book value of the  Company's  assets are sold or otherwise
transferred  to any Person or Persons  (in a single  transaction  or a series of
transactions).

                  "Commission"  shall  mean the  United  States  Securities  and
Exchange  Commission,  or any other federal agency at the time administering the
Securities Act.

                  "Exchange Act" shall mean the Securities Exchange Act of 1934,
as amended, or any similar federal statute, and the rules and regulations of the
Commission thereunder.

                  "First Restricted  Period" shall mean the period commencing on
the Closing Date and ending on the day that is 182 days after the Closing Date.

                  "Form  S-1,"  "Form S-3," "Form S-4" and "Form S-8" shall mean
(as the case may be) such form under the  Securities  Act as is in effect on the
date  hereof,  or any  successor  registration  form  to  such  form  under  the
Securities Act subsequently adopted by the Commission.

                                       2
<PAGE>

                  "Fourth Restricted Period" shall mean the period commencing on
the second  anniversary  of the Closing  Date and ending on the day  immediately
preceding the third anniversary of the Closing Date.

                  "Holders"  shall  mean:  (a) each  Potential  Seller who holds
Registrable Shares; (b) each Permitted  Transferee who holds Registrable Shares;
and (c) each other Person  holding  Registrable  Shares to whom any rights under
this Agreement shall have been assigned in accordance with Section 7 hereof.

                  "Individual Parent Shareholders" shall mean Yossi Tulpan, Amos
Fiat and Yossi Cohen.

                  A  Parent  Shareholder's  "Percentage  Share"  shall  mean the
"Percentage Share" set forth opposite such Parent Shareholder's name on Schedule
A hereto.

                  "Permitted Transferee" shall mean: (a) any Parent Shareholder;
(b) any Affiliate,  shareholder,  spouse or lineal  descendant of the Seller, of
any  Parent  Shareholder  or  of  any  shareholder  of  any  Parent  Shareholder
(including,  without  limitation,  any corporation or other entity controlled by
any Parent Shareholder); (c) any administrator,  liquidator, executor, guardian,
curator or person acting in a similar capacity for any of the Persons  described
in clauses "(a)" and "(b)" of this sentence; and (d) any trustee of a trust, the
primary  beneficiary or beneficiaries of which are any of the Persons  described
in clauses "(a)," "(b)" and "(c)" of this sentence; provided, however, that Koor
Capital  Markets and Telrad  Holdings  Ltd.  shall not be deemed to be Permitted
Transferees  of any Restricted  Shares  transferred to them by (i) an Individual
Parent  Shareholder or (ii) a Permitted  Transferee who received such Restricted
Shares from an Individual Parent Shareholder.

                  "Person" shall mean any individual, corporation,  partnership,
limited  liability  company,  firm,  joint  venture,  association,   joint-stock
company, trust, unincorporated organization,  governmental or regulatory body or
other entity.

                  "Potential  Sellers"  shall  mean the  Seller  and the  Parent
Shareholders.

                  "Purchaser  Common Stock" shall mean the common  stock,  $0.01
par value per share, of the Purchaser;  provided, however, that if the Purchaser
Common  Stock  is  converted  into or  exchanged  for  other  securities  of the
Purchaser  or of any other  Person  (pursuant  to a merger  or  recapitalization
involving the Purchaser or  otherwise),  then, for purposes of Section 4 hereof,
"Purchaser Common Stock" shall refer to such other securities.

                  "Registrable  Shares" shall mean: (a) the Transaction  Shares;
and (b) any securities issued with respect to, in exchange for or in replacement
of any of the  Transaction  Shares  (whether by way of a stock dividend or stock
split,  in connection  with a combination of shares,  recapitalization,  merger,
consolidation or other reorganization or similar event or 

                                       3
<PAGE>

otherwise);  provided,  however,  that shares of Purchaser Common Stock shall be
treated as  Registrable  Shares only if and so long as such shares are held by a
Holder.

                  "Registration  Expenses" shall mean: (a) all expenses,  except
Selling  Expenses,  incurred  in  connection  with a  registration  pursuant  to
Sections  4.1,  4.2  and  4.4  hereof,   including,   without  limitation,   all
registration,  qualification  and  filing  fees,  printing  expenses,  fees  and
disbursements  of counsel for the Purchaser and Blue Sky fees and expenses;  and
(b)  reasonable  fees  and  disbursements   (not  to  exceed  $100,000  for  all
registrations  effected pursuant to this Agreement) of a single U.S. counsel and
a  single  Israeli  counsel  for  the  Holders  who  are   participating   in  a
registration.

                  The terms "register," "registered" and "registration" refer to
a registration  effected by preparing and filing a  registration  statement with
the Commission  and the  declaration  or ordering of the  effectiveness  of such
registration statement.

                  "Regulation S" shall mean  Regulation S promulgated  under the
Securities Act.

                  "Restriction Expiration Date" shall mean the earliest to occur
of: (a) the fourth anniversary of the Closing Date; (b) the date of commencement
of a tender or exchange offer relating to at least 50% of the outstanding shares
of  Purchaser  Common  Stock;  (c) the date on which a Change in  Control of the
Purchaser  occurs;  (d) the date on which a Change  in  Control  of the  Company
occurs;  (e) the date of  execution of any binding  letter of intent,  contract,
agreement or understanding  contemplating  or otherwise  relating to an event of
the  type  referred  to in  clause  "(c)" of this  sentence;  or (f) the date of
occurrence of any material  breach or default by the  Purchaser  with respect to
any of its  obligations  under Section 2 or 4 of this  Agreement or Article V of
the Purchase Agreement,  which breach or default is not cured within twenty (20)
days after notice thereof is given to the Purchaser.

                  "Restricted  Periods" shall mean the First,  Second, Third and
Fourth Restricted Periods.

                  "Restricted  Shares" shall mean only those Transaction  Shares
that are held by the Seller,  the Escrow  Agent (in its  capacity as such),  any
Parent  Shareholder  or  any  Permitted  Transferee;   provided,  however,  that
notwithstanding  anything to the  contrary  contained in this  Agreement:  (a) a
Transaction  Share shall cease to be a  Restricted  Share (and shall cease to be
subject to the restrictions contained in this Agreement) upon the earlier of (i)
the  Restriction  Expiration  Date, or (ii) the sale of such  Transaction  Share
pursuant to Section 3.1(a),  3.1(b),  3.1(c),  3.1(d) or 3.1(f) hereof;  and (b)
upon the occurrence of a Special Termination Event with respect to an Individual
Parent  Shareholder,  all  Transaction  Shares  held by such  Individual  Parent
Shareholder, and all Transaction Shares held by any Permitted Transferee to whom
such Individual Parent Shareholder has transferred any Transaction Shares, shall
cease to be Restricted Shares (and shall cease to be subject to the restrictions
contained in this Agreement).

                                       4

<PAGE>

                  "Rule  144"  shall  mean  Rule  144   promulgated   under  the
Securities  Act,  or  any  similar  or  analogous  rule  promulgated  under  the
Securities Act.

                  "Second Restricted Period" shall mean the period commencing on
the day immediately  following the last day of the First  Restricted  Period and
ending on the day  immediately  preceding the first  anniversary  of the Closing
Date.

                  "Securities  Act" shall mean the  Securities  Act of 1933,  as
amended,  or any similar federal  statute,  and the rules and regulations of the
Commission thereunder.


                  "Selling  Expenses"  shall  mean all  underwriting  discounts,
selling  commissions  and stock  transfer  taxes  applicable  to the  securities
registered  by the  Holders  and  (except as  otherwise  specified  above in the
definition of "Registration Expenses") all fees and disbursements of counsel for
any Holder.

                  A "Special  Termination  Event" with respect to an  Individual
Parent  Shareholder  shall be deemed to have occurred if: (a) the  employment of
such  Individual  Parent  Shareholder  with the Company or any of the  Company's
Affiliates  shall have been  terminated  by the Company or any of the  Company's
Affiliates  (other  than  for  reasons  described  in  sub-paragraph  6.3 of the
Employment   Agreement   between  the  Company   and  such   Individual   Parent
Shareholder);  or (b) such  Individual  Parent  Shareholder  shall  have died or
become disabled.

                  "Special   Qualifying  Block  Trade"  shall  mean  a  sale  of
Restricted  Shares that: (a) is made in a block trade at a price of at least $15
per share;  and (b) is designated by the Seller of such Restricted  Shares (in a
written notice given to the Purchaser within 120 days following such sale) to be
a "Special Qualifying Block Trade"; provided, however, that at any time prior to
the second  anniversary of the Closing Date,  any Potential  Seller may (without
the  consent or  approval  of the  Purchaser  or any other  Person)  rescind its
designation of any such sale as a "Special Qualifying Block Trade."

                  "Third Restricted  Period" shall mean the period commencing on
the first  anniversary  of the  Closing  Date and ending on the day  immediately
preceding the second anniversary of the Closing Date.

         2.       TRANSFERABILITY OF TRANSACTION SHARES.

                  Except  as   expressly   provided  in  this   Agreement,   the
Transaction Shares (and any other securities issued with respect to, in exchange
for or in  replacement  of  any  of the  Transaction  Shares)  shall  be  freely
tradeable and  transferable,  and the Purchaser  shall take or cause to be taken
all actions necessary to ensure that the Transaction  Shares (and any such other
securities) can legally be sold, publicly and otherwise,  within and outside the
United States,  without any  restriction or limitation of any nature;  provided,
however,  that, in the event that applicable U.S. federal  securities laws shall
limit the  ability  of any  Holder to sell any of the  

                                        5
<PAGE>

Transaction  Shares,  the obligations of the Purchaser to cause such Transaction
Shares  to be freely  tradeable  and  transferrable  shall be  limited  to those
obligations of the Purchaser set forth in Section 4 hereof. Without limiting the
generality of the foregoing,  to the extent that any Holder  determines (in such
Holder's  reasonable  judgment)  that in  order  for such  Holder  to be able to
legally  sell  publicly  in  the  United  States  (without  any  restriction  or
limitation of any nature) any  Transaction  Shares that such Holder is otherwise
not  restricted  from  selling  pursuant to Section 3 hereof,  such Holder shall
notify the Purchaser of such determination and the Purchaser shall take or cause
to be taken the  actions  referred  to in  Sections  4.1 and 4.4  hereof (or the
actions  referred to in Section 4.8 hereof).  The Purchaser  agrees that it will
use  reasonable  efforts  to  furnish  to the  Potential  Sellers,  on or before
September  18,  1997,  a written  opinion of  Morrison  & Foerster  LLP or other
reputable U.S.  securities  counsel  (reasonably  satisfactory  to the Potential
Sellers  in form  and  substance)  that,  from and  after  the  forty-first  day
following the Closing Date, the sale of the Transaction  Shares by the Potential
Sellers will be exempt from  registration  under the  Securities Act and will be
exempt from (or otherwise not subject to) registration and  qualification  under
state  securities  laws;  provided,  however,  that the Purchaser  shall have no
obligation under this sentence if any of the  representations  and warranties of
the Seller contained in Section 2.33, 2.34 or 2.35 of the Purchase  Agreement is
inaccurate in any material respect.

         3.       RESALES OF RESTRICTED SHARES.

                  3.1      Resale Restrictions.

                           The Potential Sellers shall not be permitted to sell,
transfer or assign any Restricted Shares during the Restricted  Periods,  except
as follows:

                           (a)  During  the  Second   Restricted   Period,   the
Potential  Sellers may (without  being deemed to have breached  this  Agreement)
sell, transfer and/or assign a total of up to 218,000 Restricted Shares.

                           (b) During the Third Restricted Period, the Potential
Sellers  may  (without  being  deemed to have  breached  this  Agreement)  sell,
transfer and/or assign a total of up to 1,307,000  Restricted Shares,  minus the
number of Restricted  Shares that were sold by the Potential  Sellers during the
Second Restricted Period pursuant to Section 3.1(a) hereof.

                           (c) In addition to the Restricted  Shares that may be
sold,  transferred  and assigned by the Potential  Sellers  pursuant to Sections
3.1(a) and 3.1(b) hereof,  during the First, Second and Third Restricted Periods
(exclusive of the first 40 days of the First Restricted  Period),  the Potential
Sellers may (without being deemed to have breached this  Agreement) sell a total
of up to 250,000 Restricted Shares in Special Qualifying Block Trades; provided,
however,  that,  during the period  commencing on the Closing Date and ending on
the day  immediately  preceding the second  anniversary of the Closing Date, the
Purchaser  may,  on one  occasion,  prohibit  the sale of  Restricted  Shares in
Special  Qualifying  Block  Trades  (but  may not  prohibit

                                       6
<PAGE>

any other  sale of  Restricted  Shares  except  as  expressly  provided  in this
Agreement)  (i) while the  Purchaser  is actively  engaged in a firm  commitment
underwritten  public offering of at least 1,000,000  shares of Purchaser  Common
Stock,  or (ii)  for a  period  of 30 days  following  the  consummation  by the
Purchaser  of a public sale of at least  1,000,000  shares of  Purchaser  Common
Stock pursuant to a firm  commitment  underwriting,  provided that the Purchaser
first  furnishes  to  the  Potential   Sellers  written  notice  and  reasonably
satisfactory  evidence  that  the  Purchaser  is  actively  engaged  in  such an
offering, or has so consummated such a sale.

                           (d)  During  the  Fourth   Restricted   Period,   the
Potential  Sellers may (without  being deemed to have breached  this  Agreement)
sell, transfer and/or assign up to 2,376,000 Restricted Shares, minus the number
of Restricted  Shares that were sold by the Potential  Sellers during the Second
and Third Restricted Periods pursuant to Sections 3.1(a) and 3.1(b) hereof.



                           (e) The Potential  Sellers may (without  being deemed
to have  breached this  Agreement)  sell,  transfer  and/or assign any number of
Restricted Shares to any Permitted  Transferee at any time and from time to time
during any Restricted Period, provided that any such Permitted Transferee agrees
in writing,  prior to the sale, transfer or assignment to him of such Restricted
Shares, to be bound by all of the applicable  provisions of this Agreement as to
all such Restricted Shares so sold, transferred or assigned to him.

                           (f) The Potential  Sellers may (without  being deemed
to have breached this Agreement) sell,  transfer and/or assign Restricted Shares
during any  Restricted  Period in accordance  with the provisions of Section 4.2
hereof.

                  3.2      Overall Monthly Limitation.

                           The number of  Restricted  Shares that may be sold by
the Potential  Sellers  pursuant to Sections 3.1(a),  3.1(b),  3.1(c) and 3.1(d)
hereof in any  particular  calendar  month during the period  commencing  on the
Closing Date and ending on the last day of the full calendar  month  immediately
preceding the fourth  anniversary of the Closing Date shall not exceed 8.711% of
the  aggregate  number  of  shares  of  Purchaser  Common  Stock  traded  on all
securities  exchanges  and  reported  through  Nasdaq  and any  other  automated
quotation system during the calendar month immediately preceding such particular
calendar month.

                  3.3      Percentage Share Limitation.

                           Each Individual  Parent  Shareholder  agrees that the
total number of Restricted  Shares sold by such  Individual  Parent  Shareholder
pursuant to Sections 3.1(a),  3.1(b), 3.1(c) and 3.1(d) hereof during the period
from the Closing Date through the end of the Fourth  Restricted  Period will not
exceed such Individual Parent Shareholder's Percentage Share of 2,376,000.

                                       7
<PAGE>

                  3.4      Termination of Restrictions.

                           (a)   Notwithstanding   anything   to  the   contrary
contained  in this  Agreement,  all  restrictions  set forth in Section 3 hereof
(that have not  previously  terminated)  shall  terminate and cease to be of any
further force or effect upon the Restriction Expiration Date; provided, however,
that the rights  granted to the  Potential  Sellers and the other  Holders under
this  Agreement  (including  the  registration  rights  granted  under Section 4
hereof)  shall  survive  any such  termination  and  continue  in full force and
effect. Without limiting the generality of the foregoing,  the rights granted by
the Purchaser  pursuant to Section 4 hereof shall survive any merger  involving,
and any other Change in Control of, the Purchaser.

                           (b)   Notwithstanding   anything   to  the   contrary
contained in this  Agreement:  (i) upon the occurrence of a Special  Termination
Event with respect to an Individual  Parent  Shareholder,  all  restrictions set
forth in Section 3 hereof (that have not previously  terminated)  shall cease to
apply to such  Individual  Parent  Shareholder  and shall  cease to apply to any
Permitted  Transferee to whom such Individual Parent Shareholder has transferred
any Transaction  Shares;  (ii) any shares of Purchaser Common Stock sold by such
Individual  Parent  Shareholder  or any  such  Permitted  Transferee  after  the
occurrence  of a Special  Termination  Event shall not be taken into  account in
determining  the number of Restricted  Shares sold  pursuant to Section  3.1(a),
3.1(b), 3.1(c), 3.1(d) or 3.2 hereof; and (iii) for each Restricted Period after
the Restricted  Period in which a Special  Termination Event occurs with respect
to an Individual Parent Shareholder,  the aggregate maximum number of Restricted
Shares that can be sold by the  remaining  Parent  Shareholders  pursuant to the
applicable  provision  of  Section  3.1 shall be reduced by the number of shares
equal to such Individual Parent Shareholder's Percentage Share of the previously
applicable  aggregate  maximum  number of  Restricted  Shares that could be sold
under  said  provision  of  Section  3.1.  (Thus,  for  example,  if  a  Special
Termination Event occurs with respect to Yossi Tulpan (whose Percentage Share is
31.407%) in the Third Restricted  Period,  then the maximum number of Restricted
Shares that could be sold pursuant to Section  3.1(d) hereof by the other Parent
Shareholders  would be equal to 68.593% of the amount by which 2,376,000 exceeds
the number of Restricted Shares that were sold by the Potential Sellers pursuant
to Sections 3.1(a) and 3.1(b) hereof.)  Notwithstanding anything to the contrary
contained  in this  Agreement,  the  rights  granted  to the  Individual  Parent
Shareholders and their Permitted Transferees under this Agreement (including the
registration  rights  granted  under  Section 4 hereof)  shall  survive any such
termination and continue in full force and effect.

                  3.5      Hedging Transactions.

                           Nothing  contained in this  Agreement will operate to
limit the  ability  of any  Potential  Seller to lend any  Restricted  Shares in
connection  with, or otherwise  engage in,  conventional  "collar"-type or other
"hedging"  transactions at any time after the Closing;  provided,  however, that
(i) the  Potential  Sellers  shall not be permitted  to engage in any  "hedging"
transactions  with respect to their  Restricted  Shares during the 40-day period
commencing  as of the Closing Date if such  transactions  would  jeopardize  the
availability  of the  

                                       8
<PAGE>

Regulation  S exemption  for the  issuance of the  Purchaser  Common Stock being
issued to the Seller at the Closing;  and (ii) nothing contained in this Section
3.5 shall be deemed to allow a Potential  Seller to sell or  otherwise  transfer
all of such Potential Seller's  beneficial  interest in his Restricted Shares if
such transfer would violate Section 3.1 hereof.

         4.       REGISTRATION.

                  4.1      Shelf/Demand Registration.

                           (a) If the Purchaser  shall not have delivered to the
Potential  Sellers,  on or prior to  September  18,  1997,  the written  opinion
referred  to in the last  sentence  of  Section 2 hereof,  the  Purchaser  shall
promptly (and in any event prior to September 22, 1997) file with the Commission
a  registration  statement  on  Form  S-3  (a  "Shelf  Registration  Statement")
providing for the sale of 468,000  Registrable  Shares,  and the Purchaser shall
use its reasonable efforts to cause such Shelf Registration  Statement to become
effective  no later than the date 40 days after the  Closing  Date and to remain
continuously  effective until the earlier of (i) the date on which the Potential
Sellers may sell all such Registrable  Shares publicly in the United States (and
otherwise) without any restriction or limitation of any nature, or (ii) the date
on which the  distribution  described  in the Shelf  Registration  Statement  is
complete.

                           (b) Any  Holder may  request  at any time  during the
sixty day period  immediately  preceding  the first day of the Third  Restricted
Period that the Purchaser  register  under the Securities Act all or any part of
the Registrable  Shares that may be sold during the Third Restricted  Period. If
the Purchaser receives such a request,  then, subject to Sections 4.1(d) and 4.8
hereof,  the  Purchaser  shall (i)  within 10 days  after  its  receipt  of such
request,  give written notice thereof to all other Holders,  and (ii) as soon as
practicable  after its receipt of such  request (but in any event within 30 days
after its receipt of such request),  effect a registration  under the Securities
Act of all Registrable Shares that (A) the Holders request to be registered, and
(B) may be sold during such Third Restricted  Period in accordance with Sections
3.1(b) and 3.1(c)  hereof.  The Purchaser  shall use its  reasonable  efforts to
cause such registration to remain  continuously  effective until the earliest of
(A) the day  immediately  preceding the second  anniversary of the Closing Date,
(B) the  date 30 days  after  delivery  to all  Holders  of a legal  opinion  or
"no-action"  letter  and other  documentation  satisfying  the  requirements  of
Section 4.8 hereof,  or (C) the date on which the  distribution  covered by such
registration is complete.

                           (c) Any  Holder may  request  at any time  during the
sixty day period  immediately  preceding the first day of the Fourth  Restricted
Period that the Purchaser  register  under the Securities Act all or any part of
the Registrable  Shares that may be sold during the Fourth Restricted Period. If
the Purchaser receives such a request,  then, subject to Sections 4.1(d) and 4.8
hereof,  the  Purchaser  shall (i)  within 10 days  after  its  receipt  of such
request,  give written notice thereof to all other Holders,  and (ii) as soon as
practicable  after its receipt of such  request (but in any event within 30 days
after its receipt of such request),  effect a registration  under the Securities
Act of all Registrable Shares that (A) the Holders request to be registered,

                                       9

<PAGE>


and (B) may be sold during  such Fourth  Restricted  Period in  accordance  with
Section 3.1(d) hereof.  The Purchaser shall use its reasonable  efforts to cause
such registration to remain continuously  effective until the earlier of (A) the
date 30 days after  delivery  to all  Holders of a legal  opinion or "no action"
letter and other  documentation  satisfying  the  requirements  of  Section  4.8
hereof,  or (B) the date on which the distribution  covered by such registration
is complete.

                           (d)   Notwithstanding   anything   to  the   contrary
contained  in Section 4.1 hereof,  the  Purchaser  shall have no  obligation  to
effect  any  registration  pursuant  to  Section  4.1(b)  or 4.1(c)  unless  the
aggregate number of Registrable Shares requested to be registered shall be equal
to or greater than 100,000.

                  4.2      Purchaser Registration.

                           (a)  Notice of  Registration.  If at any time or from
time to time the Purchaser  shall  determine to effect a  registration  with the
Commission of any securities for its own account (other than on Form S-4 or Form
S-8) or for the account of any other Person, the Purchaser will:

                                    (i)  promptly  (and in any event at least 45
days prior to the filing of a  registration  statement  under the Securities Act
with respect to such securities) give to all Holders written notice thereof; and

                                    (ii) include in such  registration  (and any
related  registration or qualification  under Blue Sky laws), and in the related
underwriting  (if any) all  Registrable  Shares that the Holders request to have
included  in such  registration  (such  request to be in writing  and to be made
within 30 days after  receipt by all  Holders of such  written  notice  from the
Purchaser).

                           (b)  Underwriting.  If the  registration of which the
Purchaser  gives  notice  is  for a  registered  public  offering  involving  an
underwriting, the Purchaser shall so advise the Holders as a part of the written
notice given pursuant to Section  4.2(a)(i)  hereof.  In such event the right of
any Holder to have Registrable  Shares included in the registration  pursuant to
this Section 4.2 shall be conditioned  upon such Holder's  participation in such
underwriting. All Holders proposing to distribute any Registrable Shares through
such underwriting  shall (together with the Purchaser and the other shareholders
of the  Purchaser  distributing  their shares of Purchaser  Common Stock through
such underwriting)  enter into an underwriting  agreement in customary form with
the  managing  underwriter  selected  for such  underwriting  by the  Purchaser.
Notwithstanding  any other  provision  of this  Section  4.2,  if such  managing
underwriter reasonably determines that marketing factors require a limitation of
the  number  of  shares  of  Purchaser  Common  Stock  to be  included  in  such
registration and underwriting, the managing underwriter may exclude or otherwise
limit the number of shares of  Purchaser  Common  Stock to be  included  in such
registration  and  underwriting  by  shareholders  of the Purchaser,  including,

                                       10
<PAGE>

without limitation, the Holders, prior to the exclusion of any shares to be sold
pursuant to such  registration and underwriting by the Purchaser.  The number of
Registrable  Shares that may be included in the  registration  and  underwriting
shall be allocated among all the participating Holders and other shareholders of
the Purchaser participating in such registration and underwriting in proportion,
as nearly as practicable,  to the respective  numbers of Registrable Shares held
by such Holders  (and  requested  to be included in such  registration)  and the
number of shares of Purchaser Common Stock held by such other  shareholders (and
requested  to be  included  in such  registration)  at the  time of  filing  the
registration  statement.  To facilitate  the  allocation of shares in accordance
with the  above  provisions,  the  Purchaser  may  round  the  number  of shares
allocated to any Holder or shareholder to the nearest 100 shares.  If any Holder
disapproves  of the terms of any such  underwriting,  such  Holder  may elect to
withdraw  therefrom  by  written  notice  to  the  Purchaser  and  the  managing
underwriter.  Any securities  excluded or withdrawn from such underwriting shall
be withdrawn from such registration.

                           (c)   Restrictions   Not  Applicable.   None  of  the
restrictions  contained  in  Section  3  hereof  shall  apply  to  any  sale  of
Registrable Shares pursuant to a registration under this Section 4.2.

                           (d) Right to Terminate  Registration.  The  Purchaser
shall have the right to terminate or withdraw any  registration  initiated by it
under this Section 4.2 prior to the effectiveness of such registration,  whether
or  not  any  Holder  has  elected  to  include   Registrable   Shares  in  such
registration.

                           (e) No Other Grants of Registration  Rights.  Without
the prior written  consent of the  Potential  Sellers,  the Purchaser  shall not
grant to any Person any rights to have any shares of Purchaser  Common Stock, or
any securities  convertible  into or exchangeable for shares of Purchaser Common
Stock,  registered  under the  Securities Act on terms more favorable than those
set forth in this Agreement.

                  4.3 Expenses of Registration.  All Registration Expenses shall
be borne  exclusively by the Purchaser.  Unless  otherwise  stated,  all Selling
Expenses  relating to  Registrable  Shares shall be borne by the Holders of such
Registrable  Shares pro rata on the basis of the number of Registrable Shares so
sold.

                  4.4 Registration Procedures.  In the case of each registration
effected by the Purchaser pursuant to this Agreement,  the Purchaser will: (a) a
reasonable number of days prior to filing any registration statement, prospectus
or amendment or supplement  thereto with the Commission,  furnish a copy of such
registration  statement,  prospectus  or amendment or  supplement to each Holder
participating  in such  registration  for such  Holder's  review;  (b) keep each
Holder  advised  in  writing  as to the  initiation  of  each  registration  and
qualification and as to the completion  thereof;  and (c) at the Purchaser's own
expense and as expeditiously as possible:

                                       11
<PAGE>


                           (i)   prepare   and  file  with  the   Commission   a
         registration statement on Form S-3 (in the case of a registration under
         Section  4.1(a)  hereof) and, in all other  cases,  on Form S-1 or Form
         S-3, as the Purchaser shall determine,  and use its reasonable  efforts
         to cause such registration statement to become and remain effective for
         such  period  as may be  specified  in  this  Agreement  or,  if not so
         specified,  such  period that shall end on the earlier of: (A) the date
         270 days after its effectiveness, or (B) the date upon which all of the
         securities covered thereby have been sold by the Holders;

                           (ii)  furnish to each  Holder  participating  in such
         registration  upon  request  such  reasonable  number  of copies of the
         registration  statement  (and  each  amendment  thereto),   preliminary
         prospectus and final  prospectus (and each supplement  thereto) as such
         Holder  may  reasonably  request  in order  to  facilitate  the  public
         offering of the  securities  covered  thereby,  including all documents
         incorporated  therein by reference  (whether  filed with the Commission
         before or after the registration  statement becomes  effective) and all
         exhibits thereto;

                           (iii) use its reasonable  efforts to (A) register and
         qualify (or obtain  appropriate  exemptions  for) the shares covered by
         such  registration  statement  under such other  securities or Blue Sky
         laws of such  states  and other  jurisdictions  as shall be  reasonably
         requested  by  the  Holders,   and  (B)  keep  such  registrations  and
         qualifications  in effect  for so long as each  registration  statement
         remains in effect;  provided,  however, that the Purchaser shall not be
         required  in  connection  therewith  or as a  condition  thereto to (1)
         qualify to do business in any such jurisdiction,  (2) subject itself to
         taxation  in any such  jurisdiction,  or (3) file a general  consent to
         service of process in any such jurisdiction;

                           (iv)  in  the  event  of  any   underwritten   public
         offering,  enter into and perform its obligations under an underwriting
         agreement (in usual and customary form) with the managing  underwriters
         of such offering;

                           (v)  prepare  and  file  with  the  Commission   such
         amendments  and  supplements  to such  registration  statement  and the
         prospectus  used in  connection  therewith  as may be necessary to keep
         such  registration  statement  effective for the applicable  period set
         forth  in  this  Agreement,  and  comply  with  the  provisions  of the
         Securities Act with respect to the disposition of all shares covered by
         such  registration  statement during such period in accordance with the
         intended  methods of  disposition  by the sellers  thereof set forth in
         such registration statement;

                           (vi)   cause   all   securities   covered   by   such
         registration  statement  to be listed on each  securities  exchange  or
         interdealer  quotation system of the National Association of Securities
         Dealers,  Inc. on which similar  securities issued by the Purchaser are
         then listed;
                                       12
<PAGE>

                           (vii) provide a transfer  agent and registrar for all
         securities  covered by such  registration  statement not later than the
         effective date of such registration statement;

                           (viii)  notify  each  Holder  participating  in  such
         registration, promptly after the Purchaser receives notice thereof, (A)
         of the time when such registration statement has become effective,  and
         (B) at any time when a prospectus is required to be delivered under the
         Securities Act in connection with any registration statement (1) of the
         happening  of  any  event  as  a  result  of  which  such  registration
         statement,  such prospectus,  any prospectus supplement or any document
         incorporated  by reference in any of the  foregoing  contains an untrue
         statement  of a  material  fact or  omits to state  any  material  fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein,  in the light of the circumstances  under which they are made,
         not  misleading  or (2) that the Purchaser is in possession of material
         information  that it deems  advisable not to disclose in a registration
         statement;

                           (ix)  advise  each  Holder   participating   in  such
         registration,  promptly  after the Purchaser  shall  receive  notice or
         obtain  knowledge  thereof,  of the  issuance  of any stop order by the
         Commission suspending the effectiveness of such registration  statement
         or the initiation or threatening of any proceeding for such purpose and
         promptly use its reasonable efforts to prevent the issuance of any stop
         order or to obtain its withdrawal (at the earliest practicable date) if
         such stop order should be issued; and

                           (x) prior to the  effectiveness of such  registration
         statement and any post-effective  amendment thereto and at each closing
         of an underwritten offering,  (A) make such reasonable  representations
         and warranties to the Holders  participating in such registration,  and
         the  underwriters,  if any, with respect to the Registrable  Shares and
         the  registration  statement  as are  customarily  made by  issuers  to
         underwriters and selling  shareholders in underwritten  offerings,  (B)
         obtain  opinions of counsel to the Purchaser and updates thereof (which
         counsel and which  opinions  shall be  reasonably  satisfactory  to the
         underwriters,  if  any,  and to  Holders  who  hold a  majority  of the
         Registrable Shares being sold pursuant to such registration)  addressed
         to each  selling  Holder and the  underwriters,  if any,  covering  the
         matters  customarily  covered in opinions requested in public offerings
         and such other matters as may be  reasonably  requested by such Holders
         and  underwriters or their counsel,  (C) obtain  "comfort"  letters and
         updates  thereof  from the  Purchaser's  independent  certified  public
         accountants  addressed to the selling Holders and the underwriters,  if
         any,  such letters to be in customary  form and to cover matters of the
         type customarily covered in "comfort" letters given to underwriters and
         selling   shareholders  in  connection   with  secondary   underwritten
         offerings,  and (D) deliver such documents and  certificates  as may be
         reasonably  requested  by the Holders of a majority of the  Registrable
         Shares   being  sold   pursuant  to  such   registration   and  by  the
         underwriters,  if any, to evidence  compliance  with clause (A) of this
         clause  "(x)"  and  with  any  customary  conditions  contained  in the
         underwriting   agreement  or  other  agreement   entered  into  by  the
         Purchaser.



                                       13

<PAGE>

                  4.5      Indemnification.

                           (a) The  Purchaser  will  indemnify  each  Holder who
holds  any   Registrable   Shares  that  are  included  in  a  registration   or
qualification  pursuant  to  this  Agreement  and  each  person  controlling  or
controlled by such Holder within the meaning of Section 15 of the Securities Act
against any expenses,  claims,  losses,  damages or  liabilities  (or actions in
respect thereof),  including any of the foregoing  incurred in settlement of any
litigation,  commenced or threatened,  arising out of or based on (i) any untrue
statement (or alleged  untrue  statement)  of a material  fact  contained in any
registration statement,  prospectus, offering circular or other document, or any
amendment or supplement  thereto,  used in connection with such  registration or
qualification,  or (ii) any  omission (or alleged  omission) to state  therein a
material fact required to be stated  therein or necessary to make the statements
therein,  in  light  of the  circumstances  under  which  they  were  made,  not
misleading,  or (iii) any violation by the Purchaser of the Securities  Act, the
Exchange  Act,  any  state or other  securities  laws or any rule or  regulation
promulgated  under such acts or laws  applicable  to the Purchaser in connection
with any such  registration or  qualification.  In addition,  the Purchaser will
reimburse each such Holder, and each person so controlling or controlled by such
Holder, for any legal or other expenses  reasonably  incurred,  as such expenses
are incurred, in connection with investigating, preparing to defend or defending
any such claim, liability or action; provided,  however, that the Purchaser will
not be liable to any such  Holder in any such case to the  extent  that any such
expense,  loss,  damage or  liability  arises  out of or is based on any  untrue
statement  of  a  material  fact  made  by  the  Purchaser  in  the   applicable
registration  statement  in  reliance  upon and in  conformity  with  inaccurate
information  furnished  in  writing  to the  Purchaser  by any  Holder or person
controlling  such  Holder  expressly  for  use  in the  applicable  registration
statement.

                           (b) Each Holder will, if  Registrable  Shares held by
such  Holder  are  included  in  the  shares  as  to  which  a  registration  or
qualification  is being  effected  pursuant  to this  Agreement,  indemnify  the
Purchaser and each person  controlling or controlled by the Purchaser within the
meaning  of Section 15 of the  Securities  Act  against  any  expenses,  claims,
losses, damages or liabilities (or actions in respect thereof) arising out of or
based on any untrue  statement of a material fact contained in any  registration
statement,  prospectus, offering circular or other document, or any amendment or
supplement thereto,  used in connection with such registration or qualification,
and will reimburse the  Purchaser,  and each person so controlling or controlled
by the Purchaser,  for any legal or other expenses reasonably incurred,  as such
expenses are incurred, in connection with investigating,  preparing to defend or
defending any such claim,  liability or action based on such untrue statement of
a material fact, in each case to the extent,  but only to the extent,  that such
untrue  statement of a material  fact is made in reliance upon and in conformity
with inaccurate information furnished in writing to the Purchaser by such Holder
or  person   controlling  such  Holder  expressly  for  use  in  the  applicable
registration  statement.  Notwithstanding  anything to the contrary contained in
this Section 4.5(b) or elsewhere in this Agreement, any obligation of any Holder
to indemnify or reimburse  any person  pursuant to this Section shall be several
and not joint and shall be  limited to the net amount of 

                                       14
<PAGE>

proceeds received by such Holder from the sale of Registrable Shares pursuant to
the registration or qualification  in connection with which  indemnification  or
reimbursement has been sought.

                           (c) Each party entitled to indemnification under this
Section 4.5 (the "Indemnified Party") shall give notice to the party required to
provide   indemnification   (the  "Indemnifying   Party")  promptly  after  such
Indemnified Party has actual knowledge of any claim as to which indemnity may be
sought;  provided,  however,  that the failure of any Indemnified  Party to give
notice as  provided  herein  shall not  relieve  the  Indemnifying  Party of its
obligations  under  this  Section  4.5 unless  the  failure to give such  notice
materially prejudices the rights or defenses of the Indemnifying Party, in which
case the  Indemnifying  Party shall be relieved  of its  obligations  under this
Section 4.5 to the extent of such  prejudice.  In the event of the  assertion or
commencement of any claim or litigation for which indemnification may be sought,
the  Indemnifying  Party  shall have the right to assume the defense of any such
claim or  litigation  with  counsel  approved by the  Indemnified  Party  (whose
approval shall not be unreasonably  withheld),  and the Indemnified  Party shall
have the right to  participate  in such  defense at its own  expense;  provided,
however,  that the  Indemnifying  Party  shall not have the right to assume  the
defense of any matters as to which representation of both the Indemnifying Party
and the  Indemnified  Party  by the same  counsel  would  be  inappropriate  (as
reasonably  determined by the  Indemnified  Party based on the written advice of
counsel) due to actual or potential  differing interests between them, but shall
instead in such event pay the reasonable fees and costs of separate  counsel for
the Indemnified  Party. No Indemnifying  Party, in the defense of any such claim
or litigation,  shall,  except with the consent of each Indemnified Party (which
consent shall not be unreasonably  withheld) consent to entry of any judgment or
enter into any  settlement  which  does not  include  as an  unconditional  term
thereof the giving by the claimant or plaintiff to such  Indemnified  Party of a
release from all liability in respect to such claim or litigation.

                           (d)  If the  indemnification  provided  for  in  this
Section 4.5 is held by a court of competent jurisdiction to be unavailable to an
Indemnified  Party with respect to any  expenses,  claims,  losses,  damages and
liabilities  referred  to  herein,  then  the  Indemnifying  Party,  in  lieu of
indemnifying  such Indemnified  Party hereunder,  shall contribute to the amount
paid or payable by such Indemnified Party as a result of such expenses,  claims,
losses,  damages or liabilities in such  proportion as is appropriate to reflect
not only the relevant benefits  received by the Indemnifying  Party but also the
relative fault of the Indemnifying  Party on the one hand and of the Indemnified
Party on the other in connection  with the  statements,  omissions or violations
that resulted in such expenses,  claims,  losses, damages or liabilities as well
as any  other  relevant  equitable  considerations.  The  relative  fault of the
Indemnifying Party and of the Indemnified Party shall be determined by reference
to,  among other  things,  whether any untrue or alleged  untrue  statement of a
material  fact or the omission to state a material  fact relates to  information
supplied by the Indemnifying  Party or by the Indemnified Party and the parties'
relative intent, knowledge,  access to information and opportunity to correct or
prevent such statement or omission;  provided,  however, that, in any such case,
no Person guilty of fraudulent  misrepresentation (within the meaning of Section
11(f) of the Securities  Act) will be entitled to  contribution  from any Person
who was not guilty of such fraudulent misrepresentation.


                                       15

<PAGE>

                  4.6      Information Regarding Holder.

                           Each Holder whose Registrable  Shares are included in
any  registration  under this  Agreement  shall  furnish to the  Purchaser  such
information  regarding such Holder,  the Registrable  Shares held by such Holder
and the  distribution  proposed by such Holder as the Purchaser  may  reasonably
request in  writing,  to the extent  such  information  is required by law to be
disclosed in the applicable registration statement.

                  4.7      Termination of Registration Rights.

                           The rights  granted  pursuant to this Section 4 shall
terminate as to any Holder at such time as such Holder can immediately  sell all
of the  Registrable  Shares held by such Holder without  restriction  (under the
Securities Act or otherwise) in accordance with Rule 144.

                  4.8      Opinion of Counsel/"No Action" Correspondence.

                           In lieu of taking the actions referred to in Sections
4.1 and 4.4 hereof,  the Purchaser may, at its sole expense,  obtain and deliver
to a Holder who desires to effect a sale of  Registrable  Shares:  (a) a written
opinion of Morrison & Foerster LLP or other  reputable U.S.  securities  counsel
(reasonably  satisfactory  to such Holder in form and  substance)  that, or such
other evidence  (reasonably  satisfactory  in form and substance to such Holder)
indicating  that,  such  sale is  exempt  from (or  otherwise  not  subject  to)
registration and qualification under state securities laws; and (b) either (i) a
written  opinion of Morrison & Foerster LLP or other  reputable U.S.  securities
counsel (reasonably satisfactory in form and substance to such Holder) that such
sale is exempt from  registration  under the  Securities  Act, or (ii) a writing
executed by an authorized  representative  of the  Commission to the effect that
the Commission  would take no action with respect to such sale.  Nothing in this
Section 4.8 or elsewhere in this  Agreement  shall be deemed to require that any
Holder obtain an opinion of counsel or a writing executed by a representative of
the Commission in order to sell Registrable Shares.

         5.       RULE 144 REPORTING.

                  With a view to making available to the Holders the benefits of
certain rules and regulations of the Commission which may permit the sale of the
Registrable Shares to the public in the United States without registration,  the
Purchaser agrees that, so long as any Holder owns any Registrable Shares:

                  (a) the  Purchaser  will  make  and  keep  public  information
available (in accordance with Rule 144) at all times;

                                       16
<PAGE>


                  (b) the Purchaser will file with the  Commission,  in a timely
manner,  all reports and other  documents  required to be filed by the Purchaser
under the Exchange Act; and

                  (c) the  Purchaser  will furnish to each Holder  promptly upon
request (i) a written  statement  by the  Purchaser  as to its  compliance  with
applicable  requirements of Rule 144 and of the Exchange Act, (ii) a copy of the
most recent annual or quarterly  report of the  Purchaser,  and (iii) such other
reports and documents as such Holder may reasonably  request in availing  itself
of any rule or regulation of the Commission  allowing it to sell any Registrable
Shares without registration.

         6.       GOVERNING LAW.

                  This  Agreement  and the legal  relations  between the parties
arising  hereunder  shall be governed by and  interpreted in accordance with the
laws  of  the  State  of  California  without  regard  to its  conflicts  of law
provisions.  Any dispute  arising out of or relating to this Agreement  shall be
resolved  through  binding  arbitration  under  the  Rules of  Conciliation  and
Arbitration  of the  International  Chamber  of  Commerce.  The  venue  for such
arbitration  proceedings shall be in London,  England. The arbitrator's fees and
other related expenses of any arbitration under this Agreement (such as expenses
for transcripts of the arbitration  proceedings) shall be borne by the Purchaser
and the  other  parties  to such  arbitration  in such  proportions  as shall be
determined by the arbitrator,  or if there is no such  determination,  then such
fees and other  expenses  shall be borne  one-half by the Purchaser and one-half
divided equally among the other parties to such arbitration. The resolution of a
dispute by the  arbitrator  shall be  conclusive  and  binding  upon the parties
hereto and  judgment  may be entered  thereon in any court  having  jurisdiction
thereof.  The  arbitrator  shall have the  authority  to make an award of actual
compensatory damages incurred by a party in connection with a dispute, but shall
have no right to grant  special,  punitive or  exemplary  damages or indirect or
consequential  damages or to grant any form of equitable relief (except that the
arbitrator  may,  as part of his award,  require  the  Purchaser  to perform its
registration and other obligations under this Agreement).

         7.       ASSIGNABILITY.

                  Except as otherwise  provided herein,  this Agreement shall be
binding  upon and shall  inure to the  benefit of the  parties  hereto and their
respective heirs,  successors and assigns. A Holder may assign, to any Permitted
Transferee  or other  Person to which  such  Holder  transfers  at least  10,000
Registrable Shares, such Holder's registration rights and other rights hereunder
with respect to such Registrable Shares.

         8.       ENTIRE AGREEMENT.

                  This Agreement  constitutes the full and entire  understanding
and  agreement  among the parties  regarding  the  matters set forth  herein and
supersedes all prior agreements and 

                                       17
<PAGE>

understandings,  both written and oral, among or between any of the parties with
respect to the subject matter hereof.

         9.       NOTICES, ETC.

                  Any notice required or permitted hereunder shall be in writing
and shall be deemed given (a) when delivered in person,  (b) three business days
after  delivery to an  "overnight"  courier,  or (c) 24 hours after  delivery by
facsimile transmission (if receipt of such



                                       18

<PAGE>



facsimile is evidenced by a transmission  report or other reasonable evidence of
the successful and accurate transmission of such notice), in each case addressed
as follows:

<TABLE>
<CAPTION>
<S>                                                  <C>
                  If to any Parent Shareholder:      At such Parent Shareholder's address as set
                                                     forth on Schedule A hereto
</TABLE>


                                       19

<PAGE>

                                                       
                  With a copy to:               Shinar, Shachor, Weissberger
                                                5 Beit Hillel Street, 3rd Floor
                                                Tel Aviv 67017, Israel
                                                Attn: Doron Shinar
                                                Fax: 972-3-562-1905

                  If to the Purchaser:          Cylink Corporation
                                                910 Hermosa Court
                                                Sunnyvale, CA 94086
                                                Attn: Robert B. Fougner
                                                Fax: 408-774-4952

                  With a copy to:               Morrison & Foerster LLP
                                                755 Page Mill Road
                                                Palo Alto, CA  94304
                                                Attn:  Michael C. Phillips
                                                Fax: 650-494-0792

Addresses may be changed (or in the case of a Holder,  added) by written  notice
given  pursuant to this  Section.  Any notice  given  hereunder  may be given on
behalf of a party by his counsel or other authorized representative.

         10.      COUNTERPARTS.

                  This Agreement may be executed in any number of  counterparts,
each of which shall be an original,  but all of which together shall  constitute
one instrument.


         11.      AMENDMENTS.

                  This Agreement may not be amended,  modified or  supplemented,
except by means of a written  amendment  signed  by all of the  parties  hereto;
provided,  however,  that the  provisions  of Section 4 hereof may be amended by
means of a written  amendment signed by the Purchaser,  on one hand, and Holders
representing  a majority  in interest of the  Registrable  Shares,  on the other
hand, so long as such amendment does not take away any registration right of any
Holder or reduce the amount of  reimbursable  costs to any Holder in  connection
with  any   registration   hereunder   without  the  consent  of  such   Holder.
Notwithstanding  the foregoing,  any Holder may from time to time enter into one
or more agreements amending, modifying or


                                       20
<PAGE>



supplementing the provisions of this Agreement if such action does not adversely
affect the rights or interest of any other Holder. This Agreement is intended to
benefit,  and  may  be  enforced  by,  the  parties  hereto  and  the  Permitted
Transferees who receive Transaction Shares;  provided,  however,  that except as
set forth in this  Section  11,  this  Agreement  may be  amended,  modified  or
supplemented without the consent of any Permitted Transferee.

         12.      STOCK SPLITS, STOCK DIVIDENDS, ETC.

                  All numerical  references  (including dollar amounts) referred
to in this Agreement  shall be adjusted,  if  appropriate,  to reflect any stock
split,  stock  dividend,  combination  of  shares,   recapitalization,   merger,
consolidation  or other  reorganization  or similar  event  with  respect to the
Purchaser Common Stock.

         13.      LIQUIDATION OF THE SELLER; LIABILITY FOR BREACH.

                  Nothing  contained  in this  Agreement  shall be  construed or
shall operate to prevent the Seller from dissolving,  winding up, liquidating or
terminating  its  existence  at any  time  after  the  date of  this  Agreement.
Notwithstanding  anything to the contrary  contained in this  Agreement,  in the
event  of the  dissolution  or  liquidation  of the  Seller,  the  then  current
shareholder(s)  of the Seller and their  successors and assigns shall succeed to
and shall be entitled  to  exercise  and enforce all of the rights of the Seller
under this Agreement. In the event of a breach of this Agreement, the liability,
if any, of each Parent Shareholder shall be limited to such Parent Shareholder's
Percentage  Share of the  compensable  damages (if any) incurred by, and payable
to, the  Purchaser as a result of such breach.  Notwithstanding  anything to the
contrary  contained in this  Agreement  (and without  limiting the effect of the
preceding  sentence),  the total  cumulative  maximum  liability  of each Parent
Shareholder  for all  breaches  of this  Agreement  and the Parent  Shareholders
Indemnity  Agreement of even date herewith  shall be limited in the aggregate to
the  dollar  value  of the  assets  of the  Seller  distributed  to such  Parent
Shareholder by the Seller in the dissolution and liquidation of the Seller,  and
no Parent  Shareholder's  liability  hereunder and thereunder  shall exceed such
amount.

         14.      INTERPRETATION OF CERTAIN TERMS.

                  All  references  in this  Agreement to "$" or "dollars"  shall
mean U.S.  dollars,  and all  references in this  Agreement to "calendar  month"
shall be based on the Gregorian  calendar.  For purposes of this Agreement,  the
masculine  gender shall be deemed to including  the feminine and neuter  gender,
and the neuter  gender  shall be deemed to include the  masculine  and  feminine
genders.

                                       21
<PAGE>




         This Agreement is hereby executed as of the date first above written.

                                       CYLINK CORPORATION


                                       By:  /s/ John V. Kalb, Jr.
                                          --------------------------------------
                                                John V. Kalb, Jr.
                                                Vice President, Strategy and
                                                Business Development

                                       ALGORITHMIC RESEARCH LTD.


                                       By:  /s/ Yossi Tulpan
                                          --------------------------------------
                                                Yossi Tulpan
                                                Chief Executive Officer

                                       By   /s/ Yossi Cohen
                                          --------------------------------------
                                                Yossi Cohen
                                                Chief Operating Officer

                                       A.R. DATA SECURITY LTD.


                                       By:  /s/ Yossi Tulpan
                                          --------------------------------------
                                                Yossi Tulpan

                                       By:  /s/ Yossi Cohen
                                          --------------------------------------
                                                Yossi Cohen

                                       By:  /s/ Amos Fiat
                                          --------------------------------------
                                                Amos Fiat

                                       By:  /s/ Oded Koritshoner
                                          --------------------------------------
                                                Oded Koritshoner

                                       By:  /s/ Zohar Tal
                                          --------------------------------------
                                                Zohar Tal


                                       22       
<PAGE>




                                       PARENT SHAREHOLDERS:


                                       /s/ Yossi Tulpan      
                                       -----------------------------------------
                                           Yossi Tulpan

                                       /s/ Amos Fiat
                                       -----------------------------------------
                                           Amos Fiat

                                       /s/ Yossi Cohen
                                       -----------------------------------------
                                           Yossi Cohen

                                       KOOR CAPITAL MARKETS


                                       By:  /s/ Itzak  Chalamish
                                          --------------------------------------
                                                Itzak  Chalamish
                                                President

                                       By:  /s/ Yair Na'aman
                                          --------------------------------------
                                                Yair Na'aman
                                                Head of Finance Division

                                       TELRAD HOLDINGS LTD.


                                       By:  /s/ Oded Koritshoner
                                          --------------------------------------
                                                Oded Koritshoner
                                                Managing Director

                                       By:  /s/
                                          --------------------------------------


                                       23
<PAGE>


                                   Schedule A

                               Parent Shareholders

Name and Address of Parent Shareholder                      Percentage Share
- --------------------------------------                      ----------------
                                                      
Yossi Tulpan                                                     31.407%
21 Bilu Street, Ness Tziona, Israel                   
                                                      
Amos Fiat                                                        31.407%
20 Shalom Ash Street, Tel Aviv, Israel                
                                                      
Yossi Cohen                                                      10.337%
19 Mordechai Kaplan Street, Holon, Israel             
                                                      
Koor Capital Markets                                              7.501%
19 Rothschild Boulevard, Tel Aviv, Israel             
                                                      
Telrad Holdings Ltd.                                             19.348%
19 Rothschild Boulevard, Tel Aviv, Israel             
                                               





                          FREE TRANSLATION FROM HEBREW

                               INTERNAL AGREEMENT

Made and entered in Tel Aviv on 7th of September  1997 by and between AMOS FIAT
("FIAT"), YOSSI TULPAN ("TULPAN"),  YOSSI COHEN ("COHEN"),  TELRAD HOLDINGS LTD.
("TELRAD") and KOOR CAPITAL MARKETS LTD. ("KOOR").

WHEREAS the parties own all the issued fully paid for share capital of A.R. Data
Security Ltd. ("AR") as provided for in the investment  agreement dated June 30,
1996;

AND  WHEREAS the parties are  conducting  negotiations  with CYLINK  CORPORATION
("CYLINK") a NASDAQ traded public corporation  registered in California by which
all of AR's holdings in Algart  Holdings Ltd. and in  Algorithmic  Research Ltd.
will be sold to Cylink in consideration for cash and Cylink shares;

AND  WHEREAS  the  parties  wish to  adopt a  voluntary  liquidation  resolution
following the execution of a Solvency Declaration by AR's Board of Directors and
sell all of AR's holdings in the above companies during the process of voluntary
liquidation  and the division of all proceeds as liquidation  dividend among the
parties according to their proportional ownership;

AND WHEREAS in accordance with the Cylink  Agreement the  consideration  will be
deposited,  in part,  as  security  for the  indemnification  of Cylink  and the
remaining shares will be eligible for registration  according to the restriction
terms set forth in the Cylink Agreement;

NOW THEREFORE THE PARTIES AGREE AS FOLLOWS:

Liquidation of AR

1.       Prior to  executing  the  Cylink  Agreement  the  parties  will adopt a
         voluntary liquidation  resolution of AR. The parties will authorize the
         liquidator  to  enter  into an  agreement  for the  sale of all of AR's
         holdings  in Algart  and  Algorithmic  for cash and  shares and for the
         allocation  of all  proceeds  among  the  parties  according  to  their
         proportional ownership.

         1.1      The  parties  appoint  Adv.  Zeev May as AR's  liquidator  and
                  further agree that the liquidation  proceeding may be canceled
                  in the event the Cylink Agreement is not signed.

         1.2      The  parties  will  pay  their  proportional  share in all the
                  liquidation   expenses  and  costs,   including  taxes.   This
                  undertaking to be enforced in as much as the liquidation funds
                  will be  sufficient.  Such payments  will be paid  immediately
                  upon  receipt  of  the  Liquidator's  demand,  either  to  the
                  liquidation fund or directly to the authority.

                                        1

<PAGE>




         1.3      The parties agree to deposit,  out of the cash  consideration,
                  an amount  sufficient,  according to the assessment of the tax
                  attorneys,  to pay for the  capital  gains  tax to  which  the
                  consideration  is subject.  All profits accrued on the deposit
                  will serve to cover future liquidation expenses. All remaining
                  funds will be divided  proportional  between the parties  upon
                  completing the liquidation procedure.

         1.4      The parties  undertake,  jointly and severally,  to compensate
                  the  Liquidator  for all his costs and  expenses  should he be
                  sued be either  party and/or  Cylink in any matter  associated
                  with the Cylink Agreement.

Past Agreements

2.       2.1      Other than the internal  matter  concerning non-dilution to be
                  settled  within 15 days and  subject to the  execution  of the
                  Cylink Agreement, the parties agree that all provisions of the
                  investment agreement dated June 30, 1996 shall be annulled and
                  the provisions of this and the Cylink Agreement shall prevail.

Resolutions

         2.2      Any  matter   requiring  a  decision  by  the  parties   after
                  liquidation  proceedings  were begun, will be resolved in AR's
                  shareholders meeting by written resolution.

         2.3      Decisions dealing with the Trust, including the appointment of
                  the  Representative  and the  Trustee and their  removal  from
                  office  require a  unanimous  written  decision of the parties
                  ("PARTIES DECISION"). A written document signed by all parties
                  is to be considered as a Parties Decision.

Appointment of H&Q

3.       The parties agree that Hambrecht & Quist  ("Representative") will serve
         as joint market  maker for each  party's  shares and as Trustee for the
         restricted shares as provided for in the Escrow Agreement. Upon opening
         an account with the Representative, the shares will be deposited in the
         account by Koor  Investment  House (H.A.L) Ltd.  within 7 days from the
         opening  of the  account,  and for as long as no party  has  instructed
         otherwise,  each for its  shares.  The  costs  associated  with  Koor's
         handling will not exceed the quotation issued by H&Q.

Sale of Shares in the Restricted Periods

4.       The parties  will comply with the  restriction  terms  specified in the
         Sellers Agreement  ("RESTRICTION  PERIOD"). The parties will abide with
         all  rules  of law and  regulations,  both in  Israel  and in the  USA,
         governing the holding and trading of traded shares.  If required,  they
         will fulfill all requirements


                                        2

<PAGE>



         necessary  for the  release of the traded  shares  from the filing of a
         prospectus according to the Law of Securities, 1968.

5.       Unless otherwise  decided,  the parties will instruct Cylink,  and they
         hereby instruct the  Representative  to request that Cylink at the date
         provided  for  according  to  the  Sellers   Agreement,   register  all
         registerable shares in any restriction period, and for as long as it is
         required according to law.

First Period Shares

6.       The parties will instruct the Representative,  in writing,  immediately
         following the execution of the Cylink  Agreement,  to take all measures
         required for the sale of 250,000  shares free for Block  Trading in the
         first 12 months following the execution of the Cylink Agreement ("FIRST
         PERIOD"). This is subject to the restriction provisions and for as long
         as the share price does not  decrease  below US $20.00 per share in the
         first 40 days and below US $15.00 afterwards.  The Representative shall
         employ his best professional  judgment in order to maximize the parties
         profits and sell the maximum allowed shares during the first year. This
         instruction  will remain in force on all Block Traded  shares until all
         are sold or until termination of the special restriction provisions.

7.       Amendments  to  the  first  period  instructions  require  a  unanimous
         decision of the parties.

Other Periods' Shares

8.       The  following  instructions  shall  apply to the  sale of the  parties
         shares in other restriction periods:

         8.1      Each  party is free to  instruct  the  Representative,  at all
                  times,  to sell his shares,  all or in part, for as long as he
                  does not sell more than his  proportional  amount at any given
                  restriction  period  and/or  month  ("THE  PERMITTED  AMOUNT")
                  without the consent of all other parties.

         8.2      The parties  will  instruct the  Representative  to maintain a
                  record of all shares in their ownership at any particular time
                  and the  remaining  amount  they  are  allowed  to sell at any
                  period  and  in  any  month   according   to  the   applicable
                  restriction  terms  and  toward  the end of  each  restriction
                  period,  will  inform  them of the  amount of shares  that may
                  still be sold.

         8.3      The parties will instruct the  Representative  not to sell, at
                  any given period,  an amount of any party's  shares  exceeding
                  the Permitted Amount.  Should there be an objective impediment
                  for the sale of the  Permitted  Amount  put up for sale by the
                  parties  at any given  period,  then the  Representative  will
                  conduct  the  sale on a "first  come"  basis,  and all  unsold
                  amounts will be sold at the first available opportunity.



                                       3

<PAGE>



         8.4      Should a party  wish,  in a  particular  month,  to exceed his
                  Permitted  Amount,   the   Representative   shall  attempt  to
                  accommodate him, in whole or in part, on a "first come" basis,
                  always without prejudicing other parties' rights.

         8.5      The parties will  instruct the  Representative  to report,  at
                  least  at the  end  of  each  quarter,  the  Permitted  Amount
                  remaining  during  that  Restriction   Period,   both  in  the
                  accumulative and proportional to each party.

         8.6      The parties agree that, according to a Parties Decision,  each
                  party  will  be  allowed  to  sell  an  amount  exceeding  the
                  Permitted  Amount, up to the total Permitted Amount of all the
                  parties,  either in a particular  month or during a particular
                  Restriction  Period, for as long as this does not constitute a
                  violation  of  the  restriction   provisions  and  the  Cylink
                  Agreement.

                  Fiat,  Tulpan and Cohen  agree that  should they decide not to
                  sell all their  Permitted  Amount during the second year, they
                  will inform Koor and Telrad, toward the end of the second year
                  that an additional  Permitted Amount is at their disposal.  In
                  the event that Koor and Telrad have  exercised this option and
                  Fiat,  Tulpan and Cohen wish to sell more than their Permitted
                  Amount  during the third year,  Koor and Telrad will  transfer
                  part of their  Permitted  Amount,  in an internal  ratio among
                  them.

         8.7      Upon termination of the Restriction Period, each party will be
                  free to sell his shares  without  need for  approval  from the
                  other  parties.  This shall  also apply to any party  released
                  from the restriction provisions.

         8.8      A party violating the restriction  quantities by exceeding the
                  Permitted Amount or selling by others than the Representative,
                  will compensate the other parties on all their damages,  costs
                  and expenses and will allow the other parties, if so required,
                  to sell more than their Permitted Amount on his account.

Escrow, Instructions to the Trustee, Defending

9.       9.1      Until   otherwise   decided,   the  parties   agree  that  the
                  Representative  shall be appointed as Trustee according to the
                  Escrow  Agreement.  Adv.  Zeev May  shall  serve  as  Seller's
                  Representative,   until   decided   otherwise.   The  Seller's
                  Representative  will not be  entitled  to any fees and will be
                  substitutes in a majority decision.

         9.2      Instructions  to the Trustee  will be issued as  provided  for
                  hereunder or according to a Parties Decision.

10.      Upon filing a claim against the  trusteeship or upon service of a claim
         against the Escrow,  the  Seller's  Representative  shall act,  and the
         parties will instruct him to act, as follows:



                                        4

<PAGE>



         10.1     The   Seller's   Representative   will   inform  the   parties
                  immediately  and he will do his  utmost to  obtain a  decision
                  from the  parties  if they wish to  defend  the claim and will
                  follow their instructions.

         10.2     In  the  event  no  instructions  are  issued,   the  Seller's
                  Representative  will inform the Trustee and Cylink  within the
                  time set forth in the Cylink Agreement,  that the parties will
                  defend the claim or demand. The Seller's  Representative  will
                  appoint  whomever the parties instruct him to appoint in order
                  to defend  the  claim,  and in the event no  instructions  are
                  given, will use his best judgement.

                  10.2.1  If a compromise offer is issued,  it will be discussed
                          by the parties. If the parties cannot reach a decision
                          and the  trust  funds  are  sufficient  to cover  such
                          offer, a decision based on the  proportional  holdings
                          of the  parties  in the  trusteeship's  assets  at the
                          time, will be adopted.

         10.3     The Seller's  Representative will demand instructions from the
                  parties as to the  manner by which the defense costs are to be
                  financed.  If an instruction in writing is not received within
                  30 days, he shall finance it out of the cash amounts deposited
                  with  him  and/or  put  up  for  sale   shares   held  by  the
                  trusteeship, subject to the terms and limitations provided for
                  in the Cylink Agreement.

         10.4     The Seller's  Representative shall act as required in order to
                  fulfill a final judgment against the Escrow.

         10.5     While the parties are allowed to sell some of the trust shares
                  for the finance of certain legal expenses, it is possible that
                  the trust  assets will not suffice  ("SHORTAGE").  The parties
                  agree to supplement their  proportional share of the Shortage,
                  for  as  long  as   together,   and  each   according  to  his
                  proportional share, will not pay an amount exceeding the value
                  of the trust stocks.

         10.6     A decision  demanding the trust to pay expenses will be served
                  on  the  Trustee  by the  parties  carrying  signature  of the
                  majority of the parties or by a representative  of the parties
                  in  the  event  a  representative,   not  being  the  Seller's
                  Representative, was appointed by the parties.

11.      A claim or a demand from Cylink  based on Cylink's  representations  in
         the Cylink Agreement is subject to a Parties Decision. A party electing
         to  participate  in the claim  will pay his  proportional  share of the
         costs according to his holdings in AR.

Appointment of a Director in Cylink

12.      For as long as the  parties  are  entitled  to  appoint a  director  to
         Cylink's  Board  of  Directors,  the  director  will  be  elected  by a
         unanimous resolution.


                                        5

<PAGE>


13.      Each  party may vote his  Cylink  shares  according  to his  discretion
         without first receiving the approval of the other parties.

14.      Any disagreement between the parties will be settled as follows:

         14.1     The parties will convene and attempt to reach an agreement.

         14.2     In the event of failure to reach an agreement within 72 hours,
                  the matter will be  transferred  to the decision of Adv.  Zeev
                  May and Adv. Doron Shinar as arbitrators. The Arbitrators will
                  not be  bound  by the  rules  of  evidence  of  the  rules  of
                  procedure  and will not be  required  to provide  reasons  for
                  their decision.  In the event the arbitrators  refuse to enter
                  into a decision  or fail to enter  into a  decision  within 72
                  hours,  they will appoint a third  arbitrator  whose  decision
                  will be final and binding.

         Signed on the date first stated above:

         Amos Fiat (-) Yossi  Tulpan(-)  Yossi  Cohen(-)  Koor  Capital  Markets
         Ltd.(-)

         Telrad Holdings Ltd.(-)s


                                        6



CUSIP No. 232565101
                                  EXHIBIT 99.5


We, the undersigned, hereby express our agreement that the attached Schedule 13D
is filed on behalf of each of us.

Date: September 17, 1997

YOSSI TULPAN


By:      /s/ Yossi Tulpan
     -----------------------------
         Yossi Tulpan

AMOS FIAT


By:      /s/ Amos Fiat
     -----------------------------
         Amos Fiat

YOSSI COHEN


By:      /s/ Yossi Cohen
     -----------------------------
         Yossi Cohen

KOOR CAPITAL MARKETS


By:      /s/  Itzhak Chalamish
     -----------------------------
         Itzhak Chalamish, President


By:      /s/  Yair Na'aman
     -----------------------------
         Yair Na'aman, Director

TELRAD HOLDINGS LTD.


By:      /s/  Oded Korithsoner
     ---------------------------------------
         Oded Korithsoner, Managing Director







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