EXHIBIT A
AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G
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 13G (including amendments thereto) with
respect to the Common Stock of VeriSign, Inc. Each of the undersigned states
that it is entitled to individually use Schedule 13G pursuant to Rule 13d-1(c)
of the Act. Each of the undersigned is responsible for the timely filing of such
Schedule 13G 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: February 7, 2003
SCIENCE APPLICATIONS INTERNATIONAL CORPORATION
By: /s/ XXXXXXX X. XXXXX
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Xxxxxxx X. Xxxxx
Senior Vice President and
General Counsel
SAIC VENTURE CAPITAL CORPORATION
By: /s/ XXXX X. XXXXX
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Xxxx X. Xxxxx
General Counsel
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