royvanrijn: "This account isn't authorised" and "You are unknown in this system"... great, synchronization and can't logon :-(

MD5 quine, fixed point

January 5th, 2010
MD5 quines

Sometimes I let my mind wonder and I get crazy questions. Today was a good example, I encountered a MD5 hash and I started to wonder, would there be a hash which would (when hashed again) be the same?

Thus: MD5(x) = x

This would be a kind of MD5 quine, when fed into the algorithm you get the original value back. This is actually called an MD5 fixed point.

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