Aladdin Announces First Runtime Installer Certified for Windows Vista

CHICAGO, May 20, 2008- Aladdin Knowledge Systems (NASDAQ: ALDN), an information security leader specializing in authentication, software DRM and content security, today announced that it released Aladdin HASP SRM v3.1 MSI Runtime installer which is "Certified For Windows Vista". HASP SRM is the only fully integrated hardware- and software-based copy protection and licensing solution to achieve Windows Vista certification for its runtime installer.

The "Certified for Windows Vista" logo assures software vendors who wish to certify their protected software for Windows Vista that the HASP SRM Runtime installer has been thoroughly tested and certified as completely compatible with Windows Vista. Conducting rigorous compatibility testing, the "Certified for Windows Vista" designation identifies products that are designed and tested to deliver a superior experience with Windows Vista. The HASP SRM Runtime installer meets Microsoft technical requirements as well as ease-of-use requirements, including automatic updates and complete compatibility with other Certified for Windows Vista products.

"Microsoft is pleased that Aladdin Knowledge Systems has earned the Certified for Windows Vista software logo for its HASP SRM Runtime application," said Jeff Price, Senior Director in Windows Client Product Management at Microsoft Corp. "This highlights Aladdin's commitment to providing its customers with higher quality applications that deliver a more secure, reliable and compatible experience with Windows Vista."

"Certification for Windows Vista serves as the latest example of Aladdin's attentiveness to the needs of Aladdin HASP SRM customers to expand our scope of support to include more platforms for development and certification," Laila Arad-Allan, vice president of software DRM at Aladdin Knowledge Systems. "Because the HASP SRM Runtime installer is certified for Windows Vista, software publishers seeking to have their own software certified for Windows Vista can do so with the reassurance that their software protection will not stand in the way, so software publishers can freely enjoy Aladdin HASP SRM's unique software rights management capabilities, and benefit from the most robust IP protection, role-based processes, and lifecycle management."

About Aladdin HASP

The Aladdin HASP family of software DRM products is the #1 choice of software publishers worldwide. HASP provides software developers with strong software protection, licensing and distribution solutions that enable them to prevent software piracy and increase revenues, protect intellectual property, and expand licensing models to reach more customers. Visit www.Aladdin.com/HASP.

About Aladdin

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 www.Aladdin.com.

©2008 Aladdin Knowledge Systems, Ltd. All rights reserved. eSafe and 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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