Aladdin’s Market-Leading HASP Software Licensing Authentication Token Offers Full Support for Universal Applications

Aladdin HASP named leader in Software Licensing Authentication Token market for third straight year

CHICAGO, April 12, 2006 - Aladdin Knowledge Systems (Nasdaq: ALDN), the leader in Software DRM, identity management and content security solutions, today announced that its Aladdin HASP hardware-based software protection and licensing solutions now offer support for Universal Applications. The HASP HL and HASP4 software protection keys now support OS X.4 (Tiger) on both Intel/Mac and PowerPC. The new support follows a recent IDC report that named Aladdin as the #1 worldwide provider of Software Licensing Authentication Tokens (SLAT) for the third straight year.

Software developers using HASP can now allow their customers to enjoy the improved performance of the Intel-based Mac machines, while still allowing their software to run on existing PowerPC-based Mac machines. For added convenience, C API with an Xcode sample and a Daemon GUI-based installer are also provided.

Expanded Support Illustrates Aladdin’s SLAT Leadership Position

HASP’s overall reliability and continued innovation and support for the latest operating systems reinforce its ever-expanding market leadership. Published in December 2005, IDC’s “Worldwide Hardware Authentication Token 2005-2009 Forecast and 2004 Vendor Shares” report places Aladdin’s HASL HL ahead of all other providers, noting $50.4 million in revenue for 2004 and 37.2 percent of the market. The report also highlights Aladdin’s 20.9 percent increase in HASP HL sales from 2003 to 2004 – more than double the percentage growth of the next largest competitor for the same period. An abstract of the IDC report (Doc # 34452) is available online at www.idc.com.

“We’re pleased to announce this new Universal Applications support from HASP,” said Avi Barir, vice president of Software Digital Rights Management (DRM) at Aladdin Knowledge Systems. “This new support allows developers to offer software that supports the latest performance-oriented operating systems available, while consistently providing the same level of convenience to customers using other platforms. Demonstrating our expanded market leadership since 2002, the IDC report also underscores Aladdin’s long-term commitment to provide unmatched security, reliability and ease-of-use for software developers in need of powerful piracy protection and licensing enforcement. We continue to gain market share because we listen to our customers and offer the most reliable, most robust solution available.”

About Aladdin HASP

The Aladdin HASP family provides a suite of revolutionary hardware- and software-based anti-piracy solutions engineered for software publishers to ensure that their intellectual property is protected and they get paid for each product they ship. Aladdin HASP provides the highest level of anti-piracy protection available to combat unauthorized copying and use. HASP also delivers powerful new tools to enable innovative software licensing schemes and flexible pricing models that allow publishers to bring their products to market with confidence while increasing sales and profits:

* HASP for Single-User: A hardware-based (HASP HL) or software-based (HASP SL) solution for protecting and licensing software running on stand-alone computers.

* HASP for Enterprise: A hardware-based (HASP HL Net) solution for protecting and licensing software used by multiple users in network environments and the enterprise.

* HASP for Trialware: A software-based solution (HASP TT) for creating secure, controlled software trialware.

* HASP for Documents: A hardware-based system (HASP DocSeal) for protecting intellectual property and sensitive information in HTML files.

HASP is the worldwide market leader in software DRM solutions and is used by more software developers than any other product. In a recent head-to-head comparison conducted by independent testing lab KeyLabs, HASP finished far ahead of its closest competitor with a large lead in key categories including security, ease-of-use, flexibility of tools and functionality, and compatibility across platforms and environments.

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.

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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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