Aladdin eSafe Virtual Appliance Receives Checkmark Anti-Spyware Gateway Certification from West Coast Labs

West Coast Labs' Anti-Spyware Solutions Technology Report highlights eSafe's simple installation, easy configuration and user-friendly GUI

CHICAGO, April 11, 2006 - Aladdin Knowledge Systems (NASDAQ: ALDN), the leader in Software DRM, identity management and content security solutions, today announced its award-winning eSafe Virtual Appliance received West Coast Lab's Checkmark Anti-Spyware Gateway Certification. Accompanying the certification, West Coast Labs also released an Anti-Spyware Solutions Technology Report highlighting eSafe's numerous benefits.

In the West Coast technology report, the lab outlines the strict requirements for its Anti-Spyware Gateway certification and notes numerous positive conclusions for the eSafe Virtual Appliance, including:

• "eSafe Virtual Appliance is a comprehensive gateway solution, with each machine being able to cope with thousands of users; running clusters of up to eight appliances can cater for even larger organizations."
• "The GUI will be familiar to any users of Aladdin's eSafe Gateway product...It is a lively and colored display, topped by a grid showing what the product has seen, classified by source..."
• "...the administrator is left with a console providing essential information at a glance, and a detailed but easily navigable set of options."
• "Multiple options for detection and reaction exist, but it can be run effectively using default options. Especially useful is the ability to set differing setting for separate protocols."
• "eSafe Gateway's easily understood graphics cover individually the different protocols in use, instantly highlighting any arriving malware in a way designed to attract attention to the particular area of the gateway under attack. This information is of vital importance to any administrator and its presentation here could hardly be better."

"eSafe Virtual Appliance is a comprehensive gateway solution which deals effectively with a variety of spyware threats at this critical point in the network," said Chris Thomas, operations director at West Coast Labs."

"Today, Spyware is the number one security problem for enterprise users," said Shimon Gruper, vice president of technologies for the Aladdin eSafe Business Unit. "The Checkmark Anti-spyware certification and the West Coat technology report provide independent verification of eSafe as a best-of-bread Web browsing security solution that protects our customers against the ever-growing spyware threat."

To download the West Coast Labs Technology Report, please visit http://www.aladdin.com/esafe/westcoast_report.aspx. For more information on West Coast Labs, visit www.westcoastlabs.org.

About Aladdin eSafe 5

Aladdin eSafe is an integrated gateway content security solution providing proactive email security and Web browsing security. As an in-line, transparent solution, eSafe offers the industry's highest content security performance, encompassing:

• Layered anti-spyware
• Spam management
• Application filtering
• Proactive anti-virus technologies

Unlike other products which focus on viruses, eSafe protects users and the enterprise from Web-borne content threats including spam, viruses, known and unknown worms, Trojans, Webpage malicious code, spyware, unauthorized P2P, Instant Messaging applications, and more. With eSafe, organizations take control before problems arise, saving valuable time as well as thousands of dollars in costly repairs, and providing content security where it counts most - at the gateway front line. For more information on Aladdin eSafe, visit http://www.Aladdin.com/eSafe.

About Aladdin

Aladdin Knowledge Systems Ltd. is a global provider of security solutions that reduce software theft, authenticate network users and protect against unwanted Internet and e-mail content, including spam, viruses and spyware. Its security products are organized into two segments: Software Digital Rights Management (DRM) and Enterprise Security. Aladdin's Software DRM products allow software publishers to protect their intellectual property and increase revenues by reducing losses from software theft and piracy. Its Enterprise Security solutions enable organizations to secure their information technology assets by controlling who has access to their networks (authentication) and what content their users can utilize (content security). Visit the Aladdin Web site at www.Aladdin.com.

©2002-2006 Aladdin Knowledge Systems, Ltd. All rights reserved. eSafe, Aladdin Knowledge Systems and the Aladdin logo are trademarks or registered trademarks of Aladdin Knowledge Systems, Ltd. All other product and brand names mentioned in this document are trademarks or registered trademarks of their respective owners.

####

All trademarks and registered trademarks are the property of their respective holders.