Aladdin Knowledge Systems Provides Shareholder Update

TEL AVIV, ISRAEL, April 25, 2008 - Aladdin Knowledge Systems Ltd. (NASDAQ: ALDN), an information security leader specializing in authentication, software DRM and content security, today announced the company has provided additional information to supplement the company'bs first quarter 2008 financial results press release and conference call on April 21, 2008.

The addendum is meant to provide shareholders with additional insight and is available on the company's Web site at www.aladdin.com/investor, as well in the Company's filings with the Securities and Exchange Commission, which are available on the Commission's Web site at www.sec.gov.

About Aladdin Knowledge Systems

Aladdin Knowledge Systems' Software Rights Management products are the #1 choice of software developers and publishers to protect intellectual property, increase revenues, and reduce losses from software piracy. Aladdin eToken is the world's #1 USB-based authentication solution. The Aladdin eSafe secure Web gateway provides the most advanced protection against the latest Web-based threats and attacks. Aladdin has offices in 12 countries, a worldwide network of channel partners, and has won numerous awards for innovation. For more information, visit the Aladdin Web site at http://www.Aladdin.com.

©2008 Aladdin Knowledge Systems, Ltd. All rights reserved. HASP, eToken, 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.