WebApp Sec mailing list archives

MD5 math question


From: "Jeff Robertson" <jeff.robertson () digitalinsight com>
Date: Tue, 3 Jan 2006 20:18:33 -0500

Assume that a password between 1 and 24 ASCII characters was stored as
an MD5 hash. No salt. What is the probability that someone cracking the
password will find not the password that the user originally chose, but
a different password that happens to collide with it? Intuitively it
seems so unlikely that you wouldn't ever expect to see it. But what is
the probability really?

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