Thread: What is hashed?
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Old July 18th, 2002
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A hash is algorithm used to check the validity of data. If you hash a file and change one bit the hash comes out differant. If you want more information I'd suggest "Applied Cryptography" and I have a few links. (not all the information is up yet) (This one has information on SHA1 (Secure Hash Algorithm, I believe it's used by gnucleus and others).

You can search for other hash alogrithms like MD5, RC4 etc.
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