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SessionId Prediction - Classic ASP - Tool?

Subject: SessionId Prediction - Classic ASP - Tool?
Date: Fri, 22 Feb 2008 11:36:11 -0500
Have read several articles on classic .asp that its possible to predict session 
id. Has anyone had any practical experience with this or know of a tool that 
can assist with this?

From an article,

"The session ID is a read-only value that uniquely identifies the current 
clients to the Web server. In classic ASP, session IDs are assigned in a 
sequential manner?the session ID 706616433 is followed by the session ID 
706616434, and so on. The classic ASP session ID is stored on the client?s 
machine in the form of an encrypted nonpersistent cookie. For example, the 
session ID 706616434 would be stored on the client machine as the cookie 
ASPSESSIONIDGQQGQGCS=JHMBOBKCBINEHLPKJHOPABBE." - Edmond Woychowsky

How is it known that 706616434  equates to 
ASPSESSIONIDGQQGQGCS=JHMBOBKCBINEHLPKJHOPABBE?

Any advice or tool suggestions would be appreciated.

Jay


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