Aladdin Knowledge Systems to Participate in Four Upcoming Investor Conferences

CHICAGO, August 10, 2005,- Aladdin Knowledge Systems Ltd. (NASDAQ: ALDN) the worldwide leader in Software Digital Rights Management (DRM) and USB-based authentication solutions, and a leading innovator in enterprise secure content management (Enterprise Security), today announced it will participate in four upcoming investor conferences:

• August 10-12, Fifth Annual CIBC World Markets Enterprise Software Conference - New York, NY
  

  Steve Langerock, CEO, Aladdin North America

• September 7-8, Kaufman Bros Eighth Annual Investor Conference - New York, NY
  

  Yanki Margalit, CEO & Efrat Makov, CFO

• November 17, First Analysis Investor Conference - New York, NY
  

  Yanki Margalit, CEO & Efrat Makov, CFO

• November 16-17, Tamir Fishman & RBC Capital Markets AADVANTAGE Conference - Tel Aviv, Israel
  

  Yanki Margalit, CEO & Efrat Makov, CFO

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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