SECURITY DYNAMICS AND SHIVA CORP. PROVIDE MAXIMUM SECURITY FOR REMOTE
ACCESS

Cambridge, MA, May 9, 1994 -- Security Dynamics, Inc, and Shiva Corporation
today announced an alliance to incorporate Security Dynamics' ACE/Server
network security software into Shiva's line of LanRover remote access
products. Network managers can now protect their networks from
unauthorized access using the ACE/Server software. Available in June, the
software will be integrated into Shiva's LanRover/E, LanRover/T and
LanRover/PLUS servers.

As the numbers of remote workers increase, they pose a dilemma for the
network manager: how to provide easy access for authorized users while
keeping the network secure from intruders. According to Forrester
Research, 75% of Fortune 1000 companies will have remote access
capabilities by 1995. Security Dynamics' products extend network security
out to the users who are accessing the network remotely via Shiva's
products.

Alliances with the leading remote access vendors are rapidly making
Security Dynamics the de facto standard for remote access security. Said
vice-president of marketing Jim Geary, "We are excited about the
integration of our security software with Shiva's remote access servers
Along with their laptops and pocket modems, road warriors and
telecommuters can now use the SecurID Card with Shiva's products to
eliminate the risk of network break-ins."

Security Dynamics' ACE/Server goes beyond the static password security
typically provided in remote access technology. ACE/Server works in
conjunction with the SecurID Card, a patented "smart card." It provides
dynamic, two-factor authentication that combines something users know -- a
memorized password -- with something they possess -- a randomly generated
access code that changes every 60 seconds. To access a protected network,
the user enters a secret personal identification number (PIN) followed by
a code that appears on the SecurID Card. This technology provides the
highest level of security for networks, while affording maximum user
convenience and cost effectiveness. The ACE/Server also provides a
comprehensive audit trail that records all access attempts.

"Security is a vital issue for our customers. By integrating Security
Dynamics' software into Release 3.0, we are able to ensure that network
managers can confidently allow mobile professionals and remote users
secure access to the corporate network," said Woody Benson, Shiva's vice
president of marketing. "Our alliance with Security Dynamics demonstrates
our commitment to providing the highest level of security to our
customers."

Founded in 1985, Shiva Corporation is a leading supplier of remote
networking products The company was named 25th in the 1992 Inc. 500
listing of the fastest growing private U.S. companies Shiva Corporation is
headquartered in Burlington, MA.

Security Dynamics is a worldwide provider of computer security technology.
Its customers include domestic and multinational Fortune 500 companies in
the telecommunications, aerospace, petrochemical and pharmaceutical
industries, as well as financial and healthcare institutions and
federal/state governments. Security Dynamics is privately held and is
headquartered in
Cambridge, MA.

Security Dynamics
One Alewife Center
Cambridge, MA 02140-2312 USA
Phone (617) 547-7820,  Fax (617) 354-8836

Shiva Corp, Burlington, MA -- 617-270-8300

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