[147637] in cryptography@c2.net mail archive
Re: [Cryptography] Key stretching
daemon@ATHENA.MIT.EDU (John Kelsey)
Fri Oct 11 17:52:59 2013
X-Original-To: cryptography@metzdowd.com
In-Reply-To: <CAMm+LwiptxOdkkbdCQR+tK41bKjvnBUe48dfYeg1210d2uhtsQ@mail.gmail.com>
From: John Kelsey <crypto.jmk@gmail.com>
Date: Fri, 11 Oct 2013 15:28:39 -0400
To: Phillip Hallam-Baker <hallam@gmail.com>
Cc: "cryptography@metzdowd.com" <cryptography@metzdowd.com>
Errors-To: cryptography-bounces+crypto.discuss=bloom-picayune.mit.edu@metzdowd.com
This is a job for a key derivation function or a cryptographic prng. I would use CTR-DRBG from 800-90 with AES256. Or the extract-then-expand KDF based on HMAC-SHA512.
--John
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