phc-discussions - RE: [PHC] Are password trailing 0's a problem?

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Message-ID: <9A043F3CF02CD34C8E74AC1594475C7372388217@uxcn10-6.UoA.auckland.ac.nz>
Date: Sat, 8 Mar 2014 00:30:06 +0000
From: Peter Gutmann <pgut001@...auckland.ac.nz>
To: "discussions@...sword-hashing.net" <discussions@...sword-hashing.net>
Subject: RE: [PHC] Are password trailing 0's a problem?

"Dennis E. Hamilton" <dennis.hamilton@....org> writes:

>I do think using PBKDF2 with c == 1 is a strange act.

It's used in a number of places when you need a straight KDF, rather than a
password-processing function.  For example if you have a single key and need
to create two distinct keys for encrypt and MAC then you can use PBDF2 with c
= 1.

Peter.