VERISIGN INC/CA
424B3, 1999-04-08
COMPUTER PROGRAMMING SERVICES
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PROSPECTUS                                      Filed pursuant to Rule 424(b)(3)
                                                      Registration No. 333-74393


                                 45,000 SHARES

                                VERISIGN, INC.

                                 COMMON STOCK

                              ___________________

     All of the 45,000 shares of common stock of VeriSign, Inc. are being sold
by a stockholder of VeriSign. VeriSign will not receive any proceeds from the
sale of shares offered by the selling stockholder. See "Selling Stockholder" and
"Plan of Distribution."

     The common stock is listed on the Nasdaq National Market under the symbol
"VRSN." The shares of common stock offered will be sold as described under "Plan
of Distribution."

     On April 7, 1999, the closing price per share of the common stock on the
Nasdaq National Market was $150.625.



                              ___________________

The common stock offered involves a high degree of risk.  See "RISK FACTORS" on
                                    page 3.
                              ___________________
                                        



               The date of this Prospectus is April 7, 1999.

                                       1
<PAGE>
 
                                  THE COMPANY

     VeriSign is the leading provider of Internet-based trust services needed by
websites, enterprises and individuals to conduct trusted and secure electronic
commerce and communications over the Internet, intranets and extranets, or IP
networks. We have established strategic relationships with industry leaders,
including AT&T, British Telecommunications, or BT, Cisco, Microsoft, Netscape,
Network Associates, RSA, Security Dynamics and VISA, to enable widespread
utilization of our digital certificate services and to assure their
interoperability with a wide variety of applications and network equipment. We
have used our secure online infrastructure to issue over 100,000 of our website
digital certificates and over 3.5 million of our digital certificates for
individuals. Our Website Digital Certificate services are used by over 400 of
the Fortune 500 companies. We also offer the VeriSign OnSite service, which
allows an organization to leverage our trusted service infrastructure to develop
and deploy customized digital certificate services for use by its employees,
customers and business partners. Over 300 enterprises have subscribed to the
OnSite service since its introduction in November 1997, including Bank of
America, Hewlett-Packard, the Internal Revenue Service, Kodak, Sumitomo Bank,
Texas Instruments and USWest. We market our Internet-based trust services
worldwide through multiple distribution channels, including the Internet, direct
sales, telesales, value-added resellers, or VARs, systems integrators and our
affiliates, and intend to expand these distribution channels.

     VeriSign was incorporated in Delaware in April 1995. Our executive offices
are located at 1350 Charleston Road, Mountain View, California 94043-1331. Our
telephone number at this location is (650) 961-7500. Our website is located at
http://www.verisign.com. Information contained in our website is not part of
this prospectus.

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                                 RISK FACTORS

     You should carefully consider the risks and uncertainties described below
before making an investment decision. These risks and uncertainties are not the
only ones facing VeriSign. Additional risks and uncertainties not presently
known to us or that we currently deem immaterial may also impair our business
operations.

     If any of the following risks actually occur, our business, financial
condition or operating results could be materially harmed. In such case, the
trading price of our common stock could decline and you may lose all or part of
your investment.

     This prospectus also contains forward-looking statements that involve risks
and uncertainties. Our actual results could differ materially from those
anticipated in these forward-looking statements as a result of certain factors
including the risks faced by us described below and elsewhere in this
prospectus.

We Have a Limited Operating History

     VeriSign was incorporated in April 1995, and we began introducing our
Internet-based trust services in June 1995.  Accordingly, we have only a limited
operating history on which to base an evaluation of our business and prospects.
Our prospects must be considered in light of the risks and uncertainties
encountered by companies in the early stages of development.  These risks and
uncertainties are often worse for companies in new and rapidly evolving markets.
Our success will depend on many factors, including, but not limited to, the
following:

   .  the rate and timing of the growth and use of IP networks for electronic
      commerce and communications;

   .  the extent to which digital certificates are used for such communications
      and commerce;

   .  the continued evolution of electronic commerce as a viable means of
      conducting business;

   .  the demand for our Internet-based trust services;

   .  competition levels;

   .  the perceived security of electronic commerce and communications over IP
      networks;

   .  the perceived security of our services, technology, infrastructure and
      practices; and

   .  our continued ability to maintain our current, and enter into additional,
      strategic relationships.

   To address these risks we must, among other things:

   .  successfully market our Internet-based trust services and our digital
      certificates to our new and existing customers;

   .  attract, integrate, train, retain and motivate qualified personnel;

   .  respond to competitive developments;

   .  successfully introduce new Internet-based trust services; and

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<PAGE>
 
   .  successfully introduce enhancements to our existing Internet-based trust
      services to address new technologies and standards.

   We cannot be certain that we will successfully address any of these risks.

We Have a History of Losses and Anticipate Future Losses

     We have experienced substantial net losses in each fiscal period since we
were formed. As of December 31, 1998, we had an accumulated deficit of $51.4
million. VeriSign's limited operating history, the emerging nature of its market
and the factors described under "--Our Business Depends on-the Adoption of IP
Networks" and "--Our Quarterly Operating Results May Fluctuate; Our Future
Revenues and Profitability Are Uncertain," among other factors, make prediction
of our future operating results difficult. In addition, we intend to increase
our expenditures in all areas in order to execute our business plan. As a
result, we expect to incur substantial additional losses. Although our revenues
have grown in recent periods, we may be unable to sustain such growth.
Therefore, you should not consider our historical growth indicative of future
revenue levels or operating results. We may never achieve profitability. Even if
we do, we may not be able to sustain it.

Our Business Depends on the Adoption of IP Networks

     In order for VeriSign to be successful, IP networks must be widely adopted,
in a timely manner, as a means of trusted and secure electronic commerce and
communications. Because electronic commerce and communications over IP networks
are new and evolving, it is difficult to predict the size of this market and its
sustainable growth rate. To date, many businesses and consumers have been
deterred from utilizing IP networks for a number of reasons, including, but not
limited to:

   .  potentially inadequate development of network infrastructure;

   .  security concerns including the potential for merchant or user
      impersonation and fraud or theft of stored data and information
      communicated over IP networks;

   .  inconsistent quality of service;

   .  lack of availability of cost-effective, high-speed service;

   .  limited numbers of local access points for corporate users;

   .  inability to integrate business applications on IP networks;

   .  the need to operate with multiple and frequently incompatible products;
      and

   .  a lack of tools to simplify access to and use of IP networks.

     The adoption of IP networks will require a broad acceptance of new methods
of conducting business and exchanging information. Companies and government
agencies that already have invested substantial resources in other methods of
conducting business may be reluctant to adopt new methods. Also, individuals
with established patterns of purchasing goods and services and effecting
payments may be reluctant to change.

     The use of IP networks may not increase or may increase more slowly than we
expect because the infrastructure required to support widespread use may not
develop. The Internet may continue to experience significant growth both in the
number of users and the level of use. However, the Internet infrastructure may
not be able to continue to support the demands placed on it by continued growth.

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Continued growth may also affect the Internet's performance and reliability.  In
addition, the growth and reliability of IP networks could be harmed by delays in
development or adoption of new standards and protocols to handle increased
levels of activity or by increased governmental regulation.  Changes in, or
insufficient availability of, communications services to support IP networks
could result in poor performance and also adversely affect their usage.  Any of
these factors could materially harm our business.

Our Market is New and Evolving

     We target our Internet-based trust services at the market for trusted and
secure electronic commerce and communications over IP networks. This is a new
and rapidly evolving market that may not continue to grow. Accordingly, the
demand for our Internet-based trust services is very uncertain. Even if the
market for electronic commerce and communications over IP networks grows, our
Internet-based trust services may not be widely accepted. The factors that may
affect the level of market acceptance of digital certificates and, consequently,
our Internet-based trust services, include the following:

   .  market acceptance of products and services based upon authentication
      technologies other than those we use;

   .  public perception of the security of digital certificates and IP networks;

   .  the ability of the Internet infrastructure to accommodate increased levels
      of usage; and

   .  government regulations affecting electronic commerce and communications
      over IP networks.

     Even if digital certificates achieve market acceptance, our Internet-based
trust services may fail to address the market's requirements adequately.  If
digital certificates do not achieve market acceptance in a timely manner and
sustain such acceptance, or if our Internet-based trust services in particular
do not achieve or sustain market acceptance, our business would be materially
harmed.

Our Quarterly Operating Results May Fluctuate; Our Future Revenues and
Profitability Are Uncertain

     Our quarterly operating results have varied and may fluctuate significantly
in the future as a result of a variety of factors, many of which are outside our
control. These factors include the following:

   .  continued market acceptance of our Internet-based trust services;

   .  the long sales and implementation cycles for, and potentially large order
      sizes of, certain of our Internet-based trust services;

   .  the timing and execution of individual contracts;

   .  customer renewal rates for our Internet-based trust services;

   .  the timing of releases of new versions of Internet browsers or other
      third-party software products and networking equipment which include our
      digital certificate service interface technology;

   .  the mix of our services sold during a quarter;

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<PAGE>
 
   .  our success in marketing other Internet-based trust services to our
      existing customers and to new customers;

   .  continued development of our direct and indirect distribution channels,
      both in the U.S. and abroad;

   .  market acceptance of our Internet-based trust services or our competitors'
      products and services;

   .  our ability to attract, integrate, train, retain and motivate a
      substantial number of sales and marketing, research and development and
      technical support personnel;

   .  our ability to expand our operations;

   .  our success in assimilating the operations and personnel of SecureIT and
      any other acquired businesses;

   .  the amount and timing of expenditures related to expansion of our
      operations;

   .  the impact of price changes in our Internet-based trust services or our
      competitors' products and services; and

   .  general economic conditions and economic conditions specific to IP network
      industries.

     Our limited operating history and the emerging nature of our market make it
difficult to predict future revenues.  Our expenses are based, in part, on our
expectations regarding future revenues, and are largely fixed in nature,
particularly in the short term.  We may be unable to predict our future revenues
accurately or to adjust spending in a timely manner to compensate for any
unexpected revenue shortfall.  Accordingly, any significant shortfall of
revenues in relation to our expectations could cause significant declines in our
quarterly operating results.

     Due to all of the foregoing factors, our quarterly revenues and operating
results are difficult to forecast.  Therefore, we believe that period-to-period
comparisons of our operating results will not necessarily be meaningful, and you
should not rely upon them as an indication of our future performance.  Also, it
is likely that our operating results will fall below our expectations and the
expectations of securities analysts or investors in some future quarter.  In
such event, the market price of our common stock could be materially adversely
affected.

System Interruptions and Security Breaches Could Harm Our Business

     We depend on the uninterrupted operation of our secure data centers and our
other computer and communications systems. We must protect these systems from
loss, damage or interruption caused by fire, earthquake, power loss,
telecommunications failure or other events beyond our control. Most of our
systems are located at, and most of our customer information is stored in, our
facilities in Mountain View, California and Kawasaki, Japan, areas susceptible
to earthquakes. Any damage or failure that causes interruptions in our secure
data centers and our other computer and communications systems could materially
harm our business. In addition, our ability to issue digital certificates
depends on the efficient operation of the Internet connections from customers to
our secure data centers. Such connections depend upon efficient operation of web
browsers, Internet service providers and Internet backbone service providers,
all of which have had periodic operational problems or experienced outages in
the past. Any of these problems or outages could adversely affect customer
satisfaction.

                                       6
<PAGE>
 
     Our success also depends upon the scalability of our systems. Our systems
have not been tested at the volumes that may be required in the future. Thus, it
is possible that a substantial increase in demand for our Internet-based trust
services could cause interruptions in our systems. Any such interruptions could
adversely affect our ability to deliver our Internet-based trust services and
therefore could materially harm our business.

     Although we periodically perform, and retain accredited third parties to
perform, audits of our operational practices and procedures, we may not be able
to remain in compliance with our internal standards or those set by third-party
auditors. If we fail to maintain these standards, we may have to expend
significant time and money to return to compliance and our business could be
materially harmed.

     We retain certain confidential customer information in our secure data
centers. It is critical to our business strategy that our facilities and
infrastructure remain secure and are perceived by the marketplace to be secure.
Despite our security measures, our infrastructure may be vulnerable to physical
break-ins, computer viruses, attacks by hackers or similar disruptive problems.
It is possible that we may have to expend additional financial and other
resources to address such problems. Any physical or electronic break-ins or
other security breaches or compromises of the information stored at our secure
data centers may jeopardize the security of information stored on our premises
or in the computer systems and networks of our customers. In such an event, we
could face significant liability and customers could be reluctant to use our
Internet-based trust services. Such an occurrence could also result in adverse
publicity and therefore adversely affect the market's perception of the security
of electronic commerce and communications over IP networks as well as of the
security or reliability of our services.

We Face Significant Competition

     We anticipate that the market for services that enable trusted and secure
electronic commerce and communications over IP networks will remain intensely
competitive. We compete with larger and smaller companies that provide products
and services that are similar to certain aspects of our Internet-based trust
services. We expect that competition will increase in the near term, and that
our primary long-term competitors may not yet have entered the market. Increased
competition could result in pricing pressures, reduced margins or the failure of
our Internet-based trust services to achieve or maintain market acceptance, any
of which could materially harm our business. Several of our current and
potential competitors have longer operating histories and significantly greater
financial, technical, marketing and other resources. As a result, we may not be
able to compete effectively. For a more detailed description of the competitive
threats facing us.

Technological Changes Will Affect Our Business

     The emerging nature of the Internet and digital certificate markets and
their rapid evolution requires us to continually improve the performance,
features and reliability of our Internet-based trust services, particularly in
response to competitive offerings. We must also introduce any new Internet-based
trust services as quickly as possible. The success of new Internet-based trust
services depends on several factors, including proper new service definition and
timely completion, introduction and market acceptance of our new Internet-based
trust services. We may not succeed in developing and marketing new Internet-
based trust services that respond to competitive and technological developments
and changing customer needs. This could materially harm our business.

     If new Internet, networking or telecommunication technologies or standards
are widely adopted or if other technological changes occur, we may need to
expend significant resources to adapt our Internet-based trust services.

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We Must Manage Our Growth and Expansion

     Our historical growth has placed, and any further growth is likely to
continue to place, a significant strain on our resources. VeriSign has grown
from 26 employees at December 31, 1995 to 315 employees at December 31, 1998. We
have also opened additional sales offices and have significantly expanded our
operations, both in the U.S. and abroad, during this time period. We expanded
our operations by acquiring SecureIT during 1998. To be successful, we will need
to implement additional management information systems, develop further our
operating, administrative, financial and accounting systems and controls and
maintain close coordination among our executive, engineering, accounting,
finance, marketing, sales and operations organizations. Any failure to manage
growth effectively could materially harm our business.

We Depend on Key Personnel

     We depend on the performance of our senior management team and other key
employees. Our success will depend on our ability to retain and motivate these
individuals. Our success will also depend on our ability to attract, integrate,
train, retain and motivate additional highly skilled technical and sales and
marketing personnel, both in the U.S. and abroad. There is intense competition
for these personnel. In addition, our stringent hiring practices for some of our
key personnel, which consist of background checks into prospective employees'
criminal and financial histories, further limit the number of qualified persons
for such positions. See "Business--Security and Trust Practices." VeriSign has
no employment agreements with any of its key executives that prevent them from
leaving VeriSign at any time. In addition, we do not maintain key person life
insurance for any of our officers or key employees other than our President and
Chief Executive Officer. The loss of the services of any of our senior
management team or other key employees or our failure to attract, integrate,
train, retain and motivate additional key employees could materially harm our
business.

We Must Establish and Maintain Strategic Relationships

     One of our significant business strategies has been to enter into strategic
or other similar collaborative relationships in order to reach a larger customer
base than we could reach through our direct sales and marketing efforts. We may
need to enter into additional relationships to execute our business plan. We may
not be able to enter into additional, or maintain our existing, strategic
relationships on commercially reasonable terms. If we failed, we would have to
devote substantially more resources to the distribution, sale and marketing of
our Internet-based trust services than we would otherwise. Furthermore, as a
result of our emphasis on these relationships, our success in such relationships
will depend both on the ultimate success of the other parties to such
relationships, particularly in the use and promotion of IP networks for trusted
and secure electronic commerce and communications, and on the ability of certain
of these parties to market our Internet-based trust services successfully.
Failure of one or more of our strategic relationships to result in the
development and maintenance of a market for our Internet-based trust services
could materially harm our business.

     Our existing strategic relationships do not, and any future strategic
relationships may not, afford VeriSign any exclusive marketing or distribution
rights. In addition, the other parties may not view their relationships with us
as significant for their own businesses. Therefore, they could reduce their
commitment to VeriSign at any time in the future. These parties could also
pursue alternative technologies or develop alternative products and services
either on their own or in collaboration with others, including our competitors.
If we are unable to maintain our strategic relationships or to enter into
additional strategic relationships, our business could be materially harmed.

Certain of Our Internet-based Trust Services Have Lengthy Sales and
Implementation Cycles

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     We market many of our Internet-based trust services directly to large
companies and government agencies. The sale and implementation of our services
to these entities typically involves a lengthy education process and a
significant technical evaluation and commitment of capital and other resources.
This process is also subject to the risk of delays associated with customers'
internal budgeting and other procedures for approving large capital
expenditures, deploying new technologies within their networks and testing and
accepting new technologies that affect key operations. As a result, the sales
and implementation cycles associated with certain of our Internet-based trust
services can be lengthy, potentially lasting from three to six months. Our
quarterly and annual operating results could be materially harmed if orders
forecasted for a specific customer for a particular quarter are not realized.

Our Internet-based Trust Services Could Have Unknown Defects

     Services as complex as those we offer or develop frequently contain
undetected defects or errors. Despite testing, defects or errors may occur in
existing or new Internet-based trust services, which could result in loss of or
delay in revenues, loss of market share, failure to achieve market acceptance,
diversion of development resources, injury to our reputation, increased
insurance costs or increased service and warranty costs, any of which could
materially harm our business. Furthermore, we often provide implementation,
customization, consulting and other technical services in connection with the
implementation and ongoing maintenance of our Internet-based trust services and
our digital certificate service agreements. The performance of these Internet-
based trust services typically involves working with sophisticated software,
computing and communications systems. Our failure or inability to meet customer
expectations or project milestones in a timely manner could also result in loss
of or delay in revenues, loss of market share, failure to achieve market
acceptance, injury to our reputation and increased costs.

     Because customers rely on our Internet-based trust services for critical
security applications, any significant defects or errors in our Internet-based
trust services might discourage customers from subscribing to our services. Such
defects or errors could also result in tort or warranty claims. Although we
attempt to reduce the risk of losses resulting from such claims through warranty
disclaimers and liability limitation clauses in our sales agreements, these
contractual provisions may not be enforceable in every instance. Furthermore,
although we maintain errors and omissions insurance, such insurance coverage may
not adequately cover us for claims. If a court refused to enforce the liability-
limiting provisions of our contracts for any reason, or if liabilities arose
that were not contractually limited or adequately covered by insurance, our
business could be materially harmed.

Public Key Cryptography Technology Is Subject to Certain Risks

     Our Internet-based trust services depend on public key cryptography
technology. With public key cryptography technology, a user is given a public
key and a private key, both of which are required to encrypt and decode
messages. The security afforded by this technology depends on the integrity of a
user's private key and that it is not stolen or otherwise compromised. The
integrity of private keys also depends in part on the application of certain
mathematical principles known as "factoring." This integrity is predicated on
the assumption that the factoring of large numbers into their prime number
components is difficult. Should an easy factoring method be developed, then the
security of encryption products utilizing public key cryptography technology
would be reduced or eliminated. Furthermore, any significant advance in
techniques for attacking cryptographic systems could also render some or all of
our existing Internet-based trust services obsolete or unmarketable. Even if no
breakthroughs in factoring or other methods of attacking cryptographic systems
are made, factoring problems can theoretically be solved by computer systems
significantly faster and more powerful than those presently available. Current
or future governmental regulation regarding the use, scope and strength of
public key cryptography could also limit our ability to develop and distribute
digital certificates with encryption strong enough to maintain the integrity
of a user's private key against factoring by more powerful

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computer systems. If such improved techniques for attacking cryptographic
systems are ever developed, we would likely have to reissue digital
certificates to some or all of our customers, which could damage our
reputation and brand or otherwise harm our business. In the past there have
been public announcements of the successful decoding of certain cryptographic
messages and of the potential misappropriation of private keys. Such publicity
could also adversely affect the public perception as to the safety of the
public key cryptography technology included in our digital certificates. Such
adverse public perception could harm our business.

Our International Operations Are Subject to Certain Risks

     Revenues of VeriSign Japan K.K., or VeriSign Japan, and revenues from other
international affiliates and customers accounted for approximately 9% of our
revenues in 1997 and approximately 14% of our revenues in 1998. We intend to
expand our international operations and international sales and marketing
activities. Expansion into these markets has required and will continue to
require significant management attention and resources. We may also need to
tailor our Internet-based trust services for a particular market and to enter
into international distribution and operating relationships. We have limited
experience in localizing our Internet-based trust services and in developing
international distribution or operating relationships. We may not succeed in
expanding our Internet-based trust service offerings into international markets.
Any such failure could harm our business.

     In addition, there are certain risks inherent in doing business on an
international basis, including, among others:

   .  regulatory requirements;

   .  legal uncertainty regarding liability;

   .  export and import restrictions on cryptographic technology and products
      incorporating that technology;

   .  tariffs and other trade barriers;

   .  difficulties in staffing and managing foreign operations;

   .  longer sales and payment cycles;

   .  problems in collecting accounts receivable;

   .  difficulty of authenticating customer information;

   .  political instability;

   .  seasonal reductions in business activity; and

   .  potentially adverse tax consequences.

     We have licensed to certain international affiliates the VeriSign
Processing Center platform, which is designed to replicate our own secure data
centers and allows the affiliate to offer back-end processing of Internet-based
trust services. The VeriSign Processing Center platform provides an affiliate
with the knowledge and technology to offer Internet-based trust services similar
to those offered by VeriSign. It is critical to our business strategy that the
facilities and infrastructure used in issuing and marketing digital certificates
remain secure and be perceived by the marketplace to be secure. Although we
provide the affiliate with training in security and trust practices, network
management and customer

                                       10
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service and support, these practices are performed by the affiliate and are
outside of our control. Any failure of an affiliate to maintain the privacy of
confidential customer information could result in negative publicity and
therefore adversely affect the market's perception of the security of our
services as well as the security of electronic commerce and communication over
IP networks generally.

     All of our international revenues from sources other than VeriSign Japan
are denominated in U.S. dollars. If additional portions of our international
revenues were to be denominated in foreign currencies, we could become subject
to increased risks relating to foreign currency exchange rate fluctuations.

We Depend on Authentication Information

     We rely upon information provided by third-party sources to authenticate
the identity of customers requesting certain of our digital certificates. This
information is presently only available from a limited number of sources and we
currently procure such information from single sources. Reliance on single
sources involves certain risks and uncertainties, including the possibility of
delayed or discontinued availability. Any such delay or unavailability, coupled
with any inability to develop alternative sources quickly and cost-effectively,
could impair our ability to deliver certain digital certificates on a timely
basis and result in the cancellation of orders, increased costs and injury to
our reputation. This could harm our business. Reliance on third-party
information sources for authentication has also limited the distribution of
certain of our digital certificates outside of the U.S., where access to such
sources has been unavailable or limited.

     Additionally, accurate authentication of the identity of the individuals
and entities to which we issue digital certificates is necessary for such
digital certificates to provide security and trust. Therefore, if any
authentication information that we rely upon is inaccurate, it could adversely
affect our reputation and result in tort or warranty claims from customers
relying upon our digital certificates for trusted and secure electronic commerce
and communications. This could materially harm our business.

We Could Be Affected By Government Regulation

     Exports of software products utilizing encryption technology are generally
restricted by the U.S. and various non-U.S. governments. Although we have
obtained approval to export our Global Server digital certificate service and
none of our other Internet-based trust services are currently subject to export
controls under U.S. law, the list of products and countries for which export
approval is required could be revised in the future to include more digital
certificate products and related services. If we do not obtain required
approvals we may not be able to sell certain Internet-based trust services in
international markets. There are currently no federal laws or regulations that
specifically control certificate authorities, but a limited number of states
have enacted legislation or regulations with respect to certificate authorities.
If the market for digital certificates grows, the U.S. federal or state or non-
U.S. governments may choose to enact further regulations governing certificate
authorities or other providers of digital certificate products and related
services. Such regulations or the costs of complying with such regulations could
harm our business.

     Many companies conducting electronic commerce over IP networks do not
collect sales or other similar taxes with respect to shipments of goods into
other states or foreign countries or with respect to other transactions
conducted between parties in different states or countries. It is possible that
the U.S. federal or state or non-U.S. governments may seek to impose sales taxes
on companies that engage in electronic commerce over IP networks. In the event
that government bodies succeed in imposing sales or other taxes on electronic
commerce, the growth of the use of IP networks for electronic commerce could
slow substantially, which could materially harm our business.

                                       11
<PAGE>
 
     Due to the increasing popularity of IP networks, it is possible that laws
and regulations may be enacted covering issues such as user privacy, pricing,
content and quality of products and services. The increased attention focused
upon these issues as a result of the adoption of other laws or regulations may
reduce the rate of growth of IP networks, which in turn could result in
decreased demand for our Internet-based trust services or could otherwise
materially harm our business.

Acquisitions Could Harm Our Business

     During 1998, we acquired SecureIT. If we are unable to successfully
complete the integration of SecureIT, our business could be materially harmed.
We may acquire additional businesses, technologies, product lines or service
offerings in the future. Acquisitions involve a number of risks including, among
others:

   .  the difficulty of assimilating the operations and personnel of the
      acquired businesses;

   .  the potential disruption of our business;

   .  our inability to integrate, train, retain and motivate key personnel of
      the acquired business;

   .  the diversion of our management from our day-to-day operations;

   .  our inability to incorporate acquired technologies successfully into our
      Internet-based trust services;

   .  the additional expense associated with completing an acquisition and
      amortizing any acquired intangible assets;

   .  the potential impairment of relationships with our employees, customers
      and strategic partners; and

   .  the inability to maintain uniform standards, controls, procedures and
      policies.

     If we are unable to successfully address any of these risks, our business
could be materially harmed.

We Face Risks Related to Intellectual Property Rights

     Our success depends on our internally developed technologies and other
intellectual property. Despite our precautions, it may be possible for a third
party to copy or otherwise obtain and use our intellectual property or trade
secrets without authorization. In addition, it is possible that others may
independently develop substantially equivalent intellectual property. If we do
not effectively protect our intellectual property, our business could be
materially harmed.

     In the future we may have to resort to litigation to enforce our
intellectual property rights, to protect our trade secrets or to determine the
validity and scope of the proprietary rights of others. Such litigation,
regardless of its outcome, could result in substantial costs and diversion of
management and technical resources.

     We also license third-party technology, such as public key cryptography
technology licensed from RSA and other technology that is used in our products,
to perform key functions. These third-party technology licenses may not continue
to be available to us on commercially reasonable terms or at all. Our business
could be materially harmed if we lost the rights to use these technologies. A
third party could claim that the licensed software infringes any patent or other
proprietary right. Litigation between the licensor and a third party or between
us and a third party could lead to royalty obligations for which 

                                       12
<PAGE>
 
we are not indemnified or for which such indemnification is insufficient, or we
may not be able to obtain any additional license on commercially reasonable
terms or at all.

     The loss of, or our inability to obtain or maintain, any of these
technology licenses could delay the introduction of our Internet-based trust
services until equivalent technology, if available, is identified, licensed and
integrated. This could harm our business.

     From time to time, we have received, and may receive in the future, notice
of claims of infringement of other parties' proprietary rights. Infringement or
other claims could be made against us in the future. Any such claims, with or
without merit, could be time-consuming, result in costly litigation and
diversion of technical and management personnel, cause product shipment delays
or require us to develop non-infringing technology or enter into royalty or
licensing agreements. Such royalty or licensing agreements, if required, may not
be available on acceptable terms or at all. If a successful claim of product
infringement were made against us and we could not develop non-infringing
technology or license the infringed or similar technology on a timely and cost
effective basis, our business could be harmed.

Year 2000 Issues Could Affect Our Business

     We are in the process of assessing and remediating any Year 2000 issues
with the computer communications, software and security systems that we use to
deliver and manage our Internet-based trust services and to manage our internal
operations. Despite our testing and remediating, our systems may contain errors
or faults with respect to the Year 2000. For a more detailed discussion of Year
2000 issues, please see "Item 7: Management's Discussion and Analysis of
Financial Condition and Results of Operations--Year 2000 Issues" in our Annual
Report on Form 10-K, filed with the Securities and Exchange Commission on
February 22, 1999. If our systems do not operate properly with regard to the
Year 2000 and thereafter we could incur unanticipated expenses to remedy any
problems, which could adversely affect our business.

     Customer's purchasing plans could be affected by Year 2000 issues as they
may need to expend significant resources to correct their existing systems. This
situation may result in reduced funds available to implement the infrastructure
needed to conduct trusted and secure electronic commerce and communications over
IP networks or to purchase our Internet-based trust services. These factors
could materially harm our business.

We Have Implemented Certain Anti-Takeover Provisions

     Certain provisions of our Amended and Restated Certificate of Incorporation
and Bylaws, as well as provisions of Delaware law could make it more difficult
for a third party to acquire us, even if doing so would be beneficial to our
stockholders.

Future Sales of Shares Could Affect Our Stock Price

     If our stockholders sell substantial amounts of our common stock in the
public market following this offering, the market price of our common stock
could fall. We have outstanding approximately 24,850,356 shares of common stock
(assuming no exercise of outstanding options after January 29, 1999). Of these
shares 18,801,527 are currently eligible for sale in the public market. After
certain lockup agreements with the underwriters of a prior public offering to
expire on April 26, 1999, an additional 4,745,944 shares will be eligible for
sale in the public market. The remaining 1,302,885 shares will be eligible for
public sale after July 6, 1999, subject to the volume limitations and other
conditions of Rule 144.

                                       13
<PAGE>
 
     In addition, the former shareholders of SecureIT have certain rights to
require VeriSign to file a registration statement to register the resale of
373,093 shares.

     These share numbers exclude 4,129,094 shares subject to outstanding stock
options and 797,496 shares reserved for future issuance under our stock plans as
of December 31, 1998.

Our Stock Price May Be Volatile

     The market price of our common stock has fluctuated in the past and is
likely to fluctuate in the future.  In addition, the market prices of securities
of other technology companies, particularly Internet-related companies, have
been highly volatile.  Factors that may have a significant effect on the market
price of our common stock include:'

   .  fluctuations in our operating results;

   .  announcements of technological innovations or new Internet-based trust
      services by us or new products or services by our competitors;

   .  analysts' reports and projections;

   .  regulatory actions; and

   .  general market, economic or political conditions in the U.S. or abroad.

     Investors may not be able to resell their shares of our common stock at or
above the offering price.  

                                USE OF PROCEEDS

     VeriSign will not receive any of the proceeds from the sale of shares by
the selling stockholder.

                                       14
<PAGE>
 
                              Selling Stockholder

     The following table sets forth certain information known to VeriSign with
respect to the beneficial ownership of the Company's common stock as of February
28, 1999 by the selling stockholder. The selling stockholder has not had any
position, office or other material relationship with VeriSign within the past
three years. The table assumes that the selling stockholder sells all of the
shares offered by him in this offering. However, VeriSign is unable to determine
the exact number of shares that will actually be sold or when or if such sales
will occur. VeriSign will not receive the proceeds of any shares sold under this
prospectus.

     The selling stockholder has advised VeriSign that it is the beneficial
owner of the shares being offered.
<TABLE>
<CAPTION>
                                                Shares Beneficially                           Shares Beneficially
                                               Owned Before Offering                         Owned After Offering
                                               ---------------------       Shares Being      --------------------
Name                                           Number        Percent         Offered         Number        Percent
- ----                                           ------        -------         -------         ------        -------   
<S>                                            <C>           <C>             <C>             <C>           <C>
Mahendra B. Vora                               90,000       less than         45,000         45,000       less than 
                                                                1%                                            1%
</TABLE>                                                        

                                       15
<PAGE>
 
                             PLAN OF DISTRIBUTION

     The selling stockholder is an assignee of shares of common stock from a
former stockholder of SecureIT, Inc., a company which VeriSign acquired in July
1998.  The selling stockholder is bound by a registration rights agreement with
VeriSign.  To VeriSign's knowledge, the selling stockholder has not entered into
any agreement, arrangement or understanding with any particular broker or market
maker with respect to the shares offered hereby, nor does VeriSign know the
identity of the brokers or market makers that will participate in the offering.

     The shares of common stock may be offered and sold from time to time by the
selling stockholder or by pledgees, donees, transferees and other successors in
interest. The selling stockholder will act independently of VeriSign in making
decisions with respect to the timing, manner and size of each sale. Such sales
may be made over the Nasdaq National Market or otherwise, at then prevailing
market prices, at prices related to prevailing market prices or at negotiated
prices. The shares may be sold by one or more of the following:

   .  a block trade in which the broker-dealer engaged by the selling
      stockholder will attempt to sell the shares as agent but may position and
      resell a portion of the block as principal to facilitate the transaction;

   .  purchases by the broker-dealer as principal and resale by such broker or
      dealer for its account pursuant to this Prospectus; and

   .  ordinary brokerage transactions and transactions in which the broker
      solicits purchasers.

     VeriSign has been advised by the selling stockholder that it has not, as of
the date hereof, entered into any arrangement with a broker-dealer for the sale
of shares through a block trade, special offering, or secondary distribution of
a purchase by a broker-dealer.  In effecting sales, broker-dealers engaged by
the selling stockholder may arrange for other broker-dealers to participate.
Broker-dealers will receive commissions or discounts from the selling
stockholder in amounts to be negotiated immediately prior to the sale.

     In connection with distributions of the shares or otherwise, the selling
stockholder may enter into hedging transactions with broker-dealers.  In
connection with these transactions, broker-dealers may engage in short sales of
the shares in the course of hedging the positions they assume with selling
stockholder.  The selling stockholder may also sell shares short and redeliver
the shares to close out such short positions.  The selling stockholder may also
enter into option or other transactions with broker-dealers which require the
delivery to the broker-dealer of the shares, which the broker-dealer may resell
or otherwise transfer under this prospectus.  A selling stockholder may also
loan or pledge the shares to a broker-dealer and the broker-dealer may sell the
shares so loaned or, upon a default, the broker-dealer may effect sales of the
pledged shares under this Prospectus.

     Broker-dealers or agents may receive compensation in the form of
commissions, discounts or concessions from the selling stockholder in amounts to
be negotiated in connection with the sale.  Broker-dealers and any other
participating broker-dealers may be deemed to be "underwriters" within the
meaning of the Securities Act in connection with the sales, and any commission,
discount or concession may be deemed to be underwriting discounts or commissions
under the Securities Act.  The selling stockholder has agreed with VeriSign in
the registration rights agreement not to sell any of the shares under this
Prospectus in an underwritten offering without VeriSign's prior written consent.
In addition, any securities covered by this Prospectus which qualify for sale
under Rule 144 of the Securities Act may be sold under Rule 144 rather than
under this Prospectus.

                                       16
<PAGE>
 
     VeriSign has advised the selling stockholder that the anti-manipulation
rules under the Exchange Act may apply to sales of shares in the market and to
the activities of the selling stockholder and its affiliates.  The selling
stockholder has advised VeriSign that during such time as he may be engaged in
the attempt to sell shares registered, he will:

   .  not engage in any stabilization activity in connection with any of
      VeriSign's securities;

   .  not bid for or purchase any of VeriSign's securities or any rights to
      acquire VeriSign's securities, or attempt to induce any person to purchase
      any of VeriSign's securities or rights to acquire VeriSign's securities
      other than as permitted under the Exchange Act;

   .  not effect any sale or distribution of the shares until after the
      prospectus shall have been appropriately amended or supplemented, if
      required, to set forth the terms thereof; and

   .  effect all sales of shares in broker's transactions through broker-dealers
      acting as agents, in transactions directly with market makers or in
      privately negotiated transactions where no broker or other third party
      (other than the purchaser) is involved.

     Under certain circumstances, VeriSign has the ability to suspend the use of
this prospectus if, in the good faith judgment of the Board of Directors of
VeriSign, it would be seriously detrimental to VeriSign and its stockholders for
resales of shares to be made due to:

   .  the existence of a material development or potential material development
      with respect to or involving VeriSign which VeriSign would be obligated to
      disclose in the prospectus, which disclosure would in the good faith
      judgment of the Board of Directors of VeriSign be premature or otherwise
      inadvisable at such time and would have a material adverse affect upon
      VeriSign and its stockholders, or

   .  the occurrence of any event that makes any statement made in the
      prospectus or any document incorporated or deemed to be incorporated
      therein by reference untrue in any material respect or which requires the
      making of any changes in the prospectus so that it will not contain any
      untrue statement of a material fact required to be stated therein or
      necessary to make the statements therein not misleading or omit 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
      were made, not misleading.

     This offering will terminate on the earlier of:

   .  the termination of the period during which the Company is required to
      maintain the effectiveness of the Registration Statement of which this
      Prospectus forms a part, or

   .  the date on which all shares offered have been sold by the selling
      stockholder.

     VeriSign has agreed to pay the expenses of registering the shares under the
Securities Act, including registration and filing fees, printing expenses,
administrative expenses and certain legal and accounting fees.  The selling
stockholder will bear all discounts, commissions or other amounts payable to
underwriters, dealers or agents as well as fees and disbursements for legal
counsel retained by any selling stockholder.

     VeriSign and the selling stockholder have agreed to indemnify each other
and certain other related parties for certain liabilities in connection with the
registration of the Shares offered hereby.

                                       17
<PAGE>
 
     Upon the occurrence of any of the following events, this prospectus will be
amended to include additional disclosure before offers and sales of the
securities in question are made:

   .  to the extent the securities are sold at a fixed price or at a price other
      than the prevailing market price, such price would be set forth in the
      prospectus,

   .  if the securities are sold in block transactions and the purchaser acting
      in the capacity of an underwriter wishes to resell, such arrangements
      would be described in the prospectus,

   .  if the selling stockholder sells to a broker-dealer acting in the capacity
      as an underwriter, such broker-dealer will be identified in the prospectus
      and

   .  if the compensation paid to broker-dealers is other than usual and
      customary discounts, concessions or commissions, disclosure of the terms
      of the transaction would be included in the prospectus.

                                 LEGAL MATTERS

     The validity of the shares of common stock offered hereby will be passed
upon for VeriSign by Fenwick & West LLP, Palo Alto, California.

                                    EXPERTS

     The consolidated balance sheets of VeriSign, Inc., and subsidiaries as of
December 31, 1998 and 1997 and the consolidated statements of operations,
stockholders' equity, and cash flows for each of the years in the three-year
period ended December 31, 1998, have been incorporated by reference herein and
in the registration statement in reliance upon the report of KPMG LLP,
independent auditors, incorporated by reference herein, and upon the authority
of said firm as experts in accounting and auditing.

                                       18
<PAGE>
 
                  DOCUMENTS INCORPORATED BY REFERENCE IN THIS
                                  PROSPECTUS

     This Prospectus incorporates documents by reference which are not presented
herein or delivered herewith.

     All documents filed by us pursuant to Section 13(a), 13(c), 14 or 15(d) of
the Securities Exchange Act, after the date of this prospectus are incorporated
by reference into and to be a part of this prospectus from the date of filing of
those documents.

     You should rely only on the information contained in this document or that
we have referred you to.  We have not authorized anyone to provide you with
information that is different.

     The following documents which were filed by VeriSign with the Securities
and Exchange Commission, are incorporated by reference into this prospectus.

     .  VeriSign's Annual Report on Form 10-K for the year ended December 31,
        1998 (SEC file number 000-28064 and filing date February 22, 1999)

     .  VeriSign's Registration Statement on Form 8-A (SEC file number 000-23593
        and filing date January 5, 1998, which describes VeriSign's common
        stock)

     Any statement contained in a document incorporated or deemed to be
incorporated herein by reference will be deemed to be modified or superseded for
purposes of this prospectus to the extent that a statement contained in this
prospectus or any other subsequently filed document that is deemed to be
incorporated in this prospectus by reference modifies or supersedes the
statement.  Any statement so modified or superseded will not be deemed, except
as so modified or superseded, to constitute a part of this prospectus.

                      WHERE YOU CAN FIND MORE INFORMATION

     The documents incorporated by reference into this prospectus are available
from us upon request.  We will provide a copy of any and all of the information
that is incorporated by reference in this prospectus, not including exhibits to
the information unless those exhibits are specifically incorporated by reference
into this proxy statement prospectus, to any person, without charge, upon
written or oral request.

     Requests for documents should be directed to VeriSign, Inc., Attention:
Investor Relations, 1350 Charleston Road, Mountain View, California, 94043-1331,
telephone number (650) 961-7500.

     We file reports, proxy statements and other information with the Securities
and Exchange Commission.  Copies of our reports, proxy statements and other
information may be inspected and copied at the public reference facilities
maintained by the SEC:

Judiciary Plaza           Citicorp Center             Seven World Trade Center
Room 1024                 5000 West Madison Street    13th Floor
450 Fifth Street, N.W.    Suite 1400                  New York, New York  10048
Washington, D.C. 20549    Chicago, Illinois  60661

     Copies of these materials can also be obtained by mail at prescribed rates
from the Public Reference Section of the SEC, 450 Fifth Street, N.W.,
Washington, D.C. 20549 or by calling the SEC at 

                                       19
<PAGE>
 
1-800-SEC-0330. The SEC maintains a Website that contains reports, proxy
statements and other information regarding each of us. The address of the SEC
Website is http://www.sec.gov.

     VeriSign has filed a registration statement under the Securities Act with
the Securities and Exchange Commission with respect to the shares to be sold by
the selling stockholder. This prospectus has been filed as part of the
registration statement. This prospectus does not contain all of the information
set forth in the registration statement because certain parts of the
registration statement are omitted in accordance with the rules and regulations
of the SEC. The registration statement is available for inspection and copying
as set forth above.

     This prospectus does not constitute an offer to sell, or a solicitation of
an offer to purchase, the securities offered by this prospectus or the
solicitation of a proxy, in any jurisdiction to or from any person to whom or
from whom it is unlawful to make such offer, solicitation of an offer or proxy
solicitation in such jurisdiction. Neither the delivery of this prospectus nor
any distribution of securities pursuant to this prospectus shall, under any
circumstances, create any implication that there has been no change in the
information set forth or incorporated herein by reference or in our affairs
since the date of this prospectus.

                                       20
<PAGE>
 
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                                VERISIGN, INC.




                               45,000 Shares of
                                 Common Stock








                             ____________________

                                  PROSPECTUS
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