While there are a few things you can do to check for randomness (such as looking for an even statistical distribution), a comprehensive randomness test is incomputable.

I was researching this very subject a while back. IIRC, a Google search for "randomness test" came up with a few good responses. It might also be worth searching the sci.crypt newsgroup archives.

----
I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

:(){ :|:&};:

Note: All code is untested, unless otherwise stated

In reply to Re: Testing for randomness by hardburn
in thread Testing for randomness by DrHyde

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