EXHIBIT A
AGREEMENT AS TO JOINT FILING OF SCHEDULE 13D
In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of
1934, as amended, the undersigned hereby agree to the joint filing, on behalf of
each of them, of a Statement on Schedule 13D (including amendments thereto) with
respect to the Common Stock of VeriSign, Inc. Each of them is responsible for
the timely filing of such Schedule 13D and any amendments thereto, and for the
completeness and accuracy of the information concerning such person contained
therein; but none of them is responsible for the completeness or accuracy of the
information concerning the other persons making the filing, unless such person
knows or has reason to believe that such information is inaccurate.
Date: June 22, 2000
SCIENCE APPLICATIONS INTERNATIONAL CORPORATION
By /s/ Douglas E. Scott
--------------------------------------
Douglas E. Scott
Senior Vice President and General Counsel
SAIC VENTURE CAPITAL CORPORATION
By /s/ Ira J. Miller
--------------------------------------
Ira J. Miller
President
