[cryptography] Password non-similarity?

Jeffrey Walton noloader at gmail.com
Tue Dec 27 15:54:35 EST 2011

Hi All,

We're bouncing around ways to enforce non-similarity in passwords over
time: password1 is too similar too password2 (and similar to
password3, etc).

I'm not sure its possible with one way functions and block cipher residues.

Has anyone ever implemented a system to enforce non-similarity business rules?


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