Ascend Announces Compatibility with Security Solutions from Enigma Logic and Security Dynamics.

ALAMEDA, Calif.--(BUSINESS WIRE)--May 30, 1995--Ascend Communications, Inc. (NASDAQ: ASND), today announced that its Pipeline and MAX product families for high-speed remote access, will support security solutions from Enigma Logic, Inc. and Security Dynamics Technologies, Inc. (NASDAQ: SDTI).

"The Internet has recently suffered serious attacks from hackers stealing user passwords and gaining unauthorized access," said Robert Ryan, Ascend's co-founder and CEO. "Ascend supports one-time password security from Enigma Logic and Security Dynamics because they offer the best protection for our customers' valuable corporate networks. Unlike conventional fixed passwords, dynamic passwords cannot be captured and replayed."

Ascend's Pipeline and MAX product families provide both remote-site and central-site solutions for telecommuter, branch office, and small office/home office (SOHO) access to the corporate network and the Internet. Pipeline and MAX products will support Enigma Logic's SafeWord(R) AS server and Security Dynamics' SecurID(R) and ACE/Server(TM) technology for one-time password authentication for both analog and ISDN dial-in connections to the corporate LAN. Both solutions support the industry-standard RADIUS(TM) (Remote Authentication Dial In User Service) network authentication protocol.

"Enigma Logic has long recognized the need to protect network users from attackers who steal conventional passwords," said John Muir, president of Enigma Logic. "Ascend's support of open, emerging user authentication standards and multiple vendors sets an excellent example for the industry."

Enigma Logic's SafeWord AS is a full-featured, fault tolerant network authentication server providing centralized ID and logon services. SafeWord AS uses "authenticators" from several vendors to positively identify network users. In addition to fault tolerance, SafeWord "mirroring" provides load balancing and a single point of administration regardless of network size.

"Ascend recognized the challenge large companies face to transfer significant amounts of information quickly and cost effectively without compromising its confidentiality," said James M. Geary, vice president of marketing at Security Dynamics. "By partnering with Ascend, we are working closely with the industry leader in ISDN technology to offer the strongest level of authentication to SecurID users of Ascend's dial-up and ISDN products."

Security Dynamic's SecurID Card is a patented, credit-card sized smartcard that displays a randomly generated, unpredictable access code that changes automatically every 60 seconds. Ascend's Pipeline and MAX remote access servers utilize the callable application programming interface (APR) provided by SDI's ACE/Server software. Remote ISDN and analog users are required to enter a unique, two-factor SecureID passcode which is transmitted to the ACE/Server for software verification and network access.

Security Dynamics, headquartered in Cambridge, MA, designs, develops, markets and supports a broad family of security products used to protect and manage access to computer-based information resources. Its customers include domestic and multinational Fortune 500.

Enigma Logic, Inc. is a privately-held information and computer security company offering software systems on a variety of platforms to clients in the United States and abroad.

Ascend Communications, Inc. develops, manufactures, sells and supports a broad range of high-speed digital wide area network access products. These products use bandwidth on demand to enhance and extend existing corporate networks for applications such as remote LAN access, Internet access, bulk file transfer, video-conferencing, imaging and integrated voice, data and video access.

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Note to Editors: Pipeline(TM) and MAX(TM) are registered trademarks of Ascend Communications, Inc. All other products or service names mentioned herein are trademarks of their respective owners.

Ascend is headquartered at 1275 Harbor Bay Parkway, Alameda, Calif. 94502. Phone: [phone] or 510/769-6001; Fax: [phone]; E-mail: [e-mail]. Ascend's home page on the World Wide Web is http://www.ascend.com.

CONTACT: Ascend Communications

Jerri Emm, 510/769-6001

E-mail: [e-mail]

or

Gallagher PR

Kevin Gallagher, 510/743-7830

E-mail: [e-mail]

or

Enigma Logic

John Muir, 510/827-5707

or

Security Dynamics

David Hammond, 617/547-7820