eNetSecure, Inc.. Announces the Introduction of the Model 2600 - Telecommunication Intrusion Detection System.

Business Editors/High Tech Writers

SUNNYVALE, Calif.--(BUSINESS WIRE)--July 31, 2000

eNetSecure, Inc., a wholly owned subsidiary of Applied Signal Technology, Inc. (NASDAQ:APSG), today announced the introduction of the Model 2600 Telecommunication Intrusion Detection System(TIDS), Version 1.0. The Model 2600 is a security experts tool designed to assist the telecommunications and IT manager in protecting the enterprise network by monitoring dial-up modem sessions for policy or content violations. The Model 2600 protects the enterprise-level data networks at the telecommunication layer by deploying sensors at the telecommunications switch (PBX) in order to monitor network access via the switch. The platform uses a scalable PCI chassis which houses commercial off the shelf (COTS) components and proprietary algorithms to achieve passive detection and demodulation of the telecom network sessions.

To date, much of the network security industries effort has been placed on protecting the data network against unauthorized access and attacks via the ISP data link which has come to be known as the front door. These network protection tools are easily bypassed by finding unprotected or unauthorized modems inside the enterprise. Automated dialing programs are readily available online and in hacker tools kits. The Model 2600 protects against these weaknesses by monitoring and providing a history of all data traffic in and out of the enterprise through dial up access. The call type is automatically classified as modem, voice or fax. A log for each session is created identifying key metrics such as time of call, calling party number, answering party number, call type and other important information. This log, similar to a phone bill record but with more information, is archived for historical analysis by the telecom or IT security specialist. Data connections are then passively reconstructed allowing the Model 2600 to automatically recover email, web traffic, file transfers, etc. Also reconstructed are the TCP/IP packets that are the basis of many network attacks.

Additionally, through an ethernet link, the Model 2600 is capable of operating in a network mode or can interface with other intrusion detection tools to complement an enterprise-wide data protection strategy depending on the customers needs.

Until today, eNetSecure has maintained a low profile on the capability and availability of the Model 2600 since the product was still in development. Now is the time to expose the network and telecommunication communities to this new tool for securing their electronic intellectual property, stated Joe Mitchell, Director of Product Development. We can now show the power of real-time monitoring of dial up connections in a manner consistent with the technologies used in traditional network monitoring.

This first release is targeted at the knowledge experts who know what to look for during a telecommunication probe and after a break-in has occurred. The second release, currently in development and scheduled for release during the 4th quarter of this year, will allow for moving that expert knowledge into the Model 2600 to automatically raise alerts and alarms and determine the appropriate response.

Brian Offi, eNetSecure's President and Chief Executive Officer commented, This is yet another successful building block in securing the vision of firmly establishing eNetSecure in the network security marketplace. With the successful release of Version 1.0 of the Model 2600, we can now demonstrate our ability to serve as the industry's most robust telecommunications-based firewall/intrusion detection system and will now begin a much more aggressive education and marketing campaign. Meanwhile, we continue to pursue other exciting business initiatives and expect to announce them in the months ahead.

About eNetSecure, Inc.:

eNetSecure, Inc., a subsidiary of Applied Signal Technology, Inc. is a provider of scalable network security solutions to the rapidly emerging network security marketplace. The Company can provide a range of solutions from design and development to product level solutions. For additional Company-related information, visit the Companys web site located at enetsec.com or contact Brian Offi at [phone].

About Applied Signal Technology, Inc.:

Applied Signal Technology, Inc., the parent company of eNetSecure, Inc., designs, develops, manufactures and markets advanced digital signal processing equipment to process a wide range of telecommunications signals for commercial and government applications. For additional Company-related information, visit the Company's web site located at appsig.com.