Aladdin VP to Speak on Proactive Anti-Virus Protection at Infosecurity Europe Event

CHICAGO, April 21, 2006 - Aladdin Knowledge Systems (NASDAQ: ALDN) the leader in Software DRM, identity management and content security solutions, today announced that Shimon Gruper, vice president of eSafe Technologies for the Aladdin eSafe Business Unit, is scheduled to speak at the Infosecurity Europe event on Tuesday, April 25th from 12:15 to 12:45 p.m.

Held in the Technical Theatre inside the show at the Grand Hall, Olympia in London, Gruper's session, titled "Virus Protection: Proactive vs. Anti," will discuss how a proactive virus protection solution works and how suspicious activity is analyzed and categorized. The session will also outline different technologies which can be used to proactively detect malicious code, viruses, Trojans, etc., from different sources. For more information, visit http://www.infosec.co.uk/page.cfm/action=Seminars/SeminarID=66.

A noted expert in the fields of anti-virus, anti-spam, anti-spyware, email security, vulnerabilities and numerous other content security threats, Mr. Gruper serves as a frequent speaker at numerous worldwide industry events. He is also the creator of the "generic" process to trap and nullify malicious code and vandals. Mr. Gruper leads the worldwide Aladdin eSafe development team, receiving numerous awards for the product's uniquely powerful content security capabilities for the enterprise.

Aladdin Infosecurity Europe Booth #930

Aladdin will be presenting live demonstrations of eSafe 5 Feature Release 2, including the new URL Filtering Module and Spyware Neutralizer, a clientless tool for network administrators to remotely identify spyware infected Windows workstations and neutralizing the existing spyware.

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.

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