[21669] in cryptography@c2.net mail archive
Re: [Cfrg] HMAC-MD5
daemon@ATHENA.MIT.EDU ("Hal Finney")
Thu Mar 30 14:17:34 2006
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
To: cryptography@metzdowd.com
Date: Thu, 30 Mar 2006 11:10:11 -0800 (PST)
From: hal@finney.org ("Hal Finney")
I (Hal Finney) wrote:
> A couple of (rather uninformed) thoughts regarding HMAC-MD5: First,
> how could collision attacks be extended to preimage attacks? And second,
> how would preimage attacks affect HMAC-MD5?
I have to apologize for that message; I was totally confused particularly
in the second part where I discussed the impact of an MD5 preimage break
on HMAC-MD5. What I described was completely wrong and had nothing to do
with an attack on HMAC-MD5. Luckily the message was so long and poorly
written that hopefully few people were able to follow it well enough to
be misled. Again, apologies.
Hal Finney
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