Aladdin HASP Software DRM Solutions to Seamlessly Support Microsoft’s Windows Vista Operating System

CHICAGO, December 5, 2006 - Aladdin Knowledge Systems (NASDAQ: ALDN), the leader in Software DRM, strong authentication and content security solutions, today announced its industry-leading Aladdin HASP family of software protection, licensing and distribution solutions will provide full support for applications designed for Microsoft’s Windows Vista™ operating system.

Aladdin HASP, the most widely used hardware-based software protection and licensing solution, will offer software developers and publishers Windows Vista support through a simple update of the HASP device driver available on the Aladdin Web site on Monday, December 18th.

“Aladdin continues to provide its valued customers with timely, effective support for the latest platforms, including the release of Windows Vista,” said Avi Barir, vice president of software DRM for Aladdin Knowledge Systems. “HASP remains the clear market leader due to Aladdin’s commitment to providing solutions and support that match the latest technologies for software developers.”

About Aladdin HASP

The Aladdin HASP family of software DRM products is the number one choice of software publishers worldwide. It provides software developers and publishers with strong software protection, licensing and distribution solutions that enables them to prevent software piracy and increase revenues, protect valuable intellectual property, and expand licensing models to reach more customers. For more information, please visit www.Aladdin.com/HASP.

About Aladdin

Aladdin Knowledge Systems Ltd. (NASDAQ: ALDN), founded in 1985, is a global provider of security solutions. Its security products are organized into two segments: Software Digital Rights Management (DRM) and Enterprise Security. Aladdin’s Software DRM products allow software developers and publishers to protect their intellectual property, increase revenues through licensing, and reduce losses from software piracy. Aladdin’s Enterprise Security solutions enable organizations to secure their information technology assets by controlling who has access to their networks (identity and password management) and what content their users can utilize (proactive content security). Aladdin has offices in 10 countries, a worldwide network of channel partners and holds numerous industry awards for innovation and reliability. For more information, please visit the Aladdin Web site at www.Aladdin.com.

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©2002-2006 Aladdin Knowledge Systems, Ltd. All rights reserved. HASP, 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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