Finally, some details on how the MD5 attacks work. And improvements on the
already easy attack.
-J
---------- Forwarded message ----------
Date: Mon, 07 Mar 2005 23:52:18 +0100
From: Ralf-Philipp Weinmann <[EMAIL PROTECTED]>
To: [email protected]
Subject: News at 8: Attacks on MD5 getting better
Seems like not only Ms. Wang and her team are able to practically
produce MD5 collisions anymore. Vlastimil Klima recently described [1]
his own research and experiments and allegedly is able to produce
collisions on an off-the-shelf 1.6 GHz Pentium M at a rate of one every
8 hours.
This, he concludes, is a speed-up of about a factor 3-6 over the Chinese
team [to the crowd that can't wait till Eurocrypt 2005: see [2]].
Furthermore, he seems to be optimistic to be able to bring it down to
about 2 minutes per collision on the same machine. *knock on wood*
I wonder how long it'll take till somebody comes up with a way to
"calculate MD5 collisions by hand" :)
An now on to your regularly scheduled program...
Cheers,
Ralf
[1] V. Klima: Finding MD5 Collisions - a Toy For a Notebook
http://cryptography.hyperlink.cz/md5/MD5_collisions.pdf
[2] X. Wang and H. Yu: How to Break MD5 and Other Hash Functions
http://www.infosec.sdu.edu.cn/paper/md5-attack.pdf
--
Ralf-P. Weinmann <[EMAIL PROTECTED]>
TU Darmstadt, FB Informatik, FG Theoretische Informatik
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