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Good post but talking about hash functions being broken when your authentication system is a password is basically rearranging the deckchairs on the titanic. Passwords are broken much, much worse than MD5 is broken. Anybody with data to protect that thinks they can't tolerate the compromise of a password, probably shouldn't be using a password. Any user relying on a password should assume it will be compromised and be ready to change it.
Commented Apr 6, 2012 on
Hashes are a bit like fingerprints for data. A given hash uniquely represents a file, or any arbitrary collection of data. At least in theory. This is a 128-bit MD5 hash you're looking at above, so it can represent at most 2128 unique items, or 340 trillion trillion trillion. In reality the...
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