RSA & Sec. Dyn.

[Ben Rothke <ben.rothke@citicorp.com>]

It's true:

FOR IMMEDIATE RELEASE 

Security Dynamics to Acquire RSA in Transaction Valued at
Approximately $200 Million 

Cambridge MA and Redwood City, CA -- April 15, 1996 -- Security Dynamics Technologies, Inc. 
(NASDAQ: SDTI) and RSA Data Security, Inc. today announced that they have signed a definitive 
agreement for Security Dynamics to acquire RSA, a Redwood City, California vendor of encryption 
software. The transaction is intended to be carried out by the merger of RSA and a wholly-owned 
subsidiary of Security Dynamics in a tax-free transaction accounted for as a  pooling of 
interests. For the year ended December 31, 1995, RSA had revenues and net income of 
approximately $11,6000,000 and $950,000, respectively.



Ben