I think the Session ID should be based on multiple time-dependant sureties and not a random value as there is a possibility, however small or unpredictable, that two calls to rand() might return the same value. If a session is based on time, surely it makes sense to use a time-dependant value in choosing a session ID.

As to how big a session ID string should be, well big enough to ensure that there are no session-ID collisions within the lifetime of your application. A SHA1 hash of a few values quite surely suffices but might not be ideal due to the overhead required in calculating the hash. Maybe some other hashing algorithm that is less-resource intensive?

perl -e '$,=$",$_=(split/\W/,$^X)[y[eval]]]+--$_],print+just,another,split,hack'er

In reply to Re^5: Identifying clients by Firefly258
in thread Identifying clients by ruzam

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