Aladdin to Participate in Five Investor Conferences

CHICAGO, May 18, 2006 - Aladdin Knowledge Systems (NASDAQ: ALDN), the leader in Software DRM, identity management, and content security solutions, today announced it is scheduled to participate in five investor conferences throughout May and June:

• CIBC Israeli Investors Conference
  May 21st - Tel Aviv, Israel - Yanki Margalit, CEO
• Morgan Keegan Information Security Conference
  May 24th - New York, New York - Steve Langerock, CEO, Aladdin North America
• FBR Growth Conference
  May 31st - New York, New York - Efrat Makov, CFO
• Cowen & Co. Technology Conference
  June 1st - New York, New York - Efrat Makov, CFO
• Janney Montgomery Scott Identity Technology Convergence Conference
  June 6th - New York, New York - Steve Langerock, CEO, Aladdin North America

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. 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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