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Date: Fri, 27 Jul 2012 06:58:33 +0200
From: Frank Dittrich <>
Subject: Re: mscash2 / hmac-md5 ambiguity

On 07/27/2012 12:57 AM, Alexander Cherepanov wrote:
> One solution is to add to hmac-md5 hashes some prefix like $HMAC-MD5$ or
> {HMAC-MD5}. BTW why there is none now?

Because for hmac-md5 *any* input is valid, you don't know if a hash is
prefixed, of if "{HMAC-MD5}" just happens to be the begin of an
unprefixed string, so you'd have to convert it to "{HMAC-MD5}{HMAC-MD5}"


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