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Date: Mon, 14 Apr 2008 13:11:33 +0400
From: Solar Designer <>
Subject: Re: AES Bitslice and the PS3 MD5 cracking.

I've exchanged some e-mails with Nick Breese, and here's what I learned:

On Mon, Mar 31, 2008 at 05:10:44PM +0100, Larry Bonner wrote:
> I saw the presentation, it is now claimed PS3 can compute 1.9 billion
> calculations per second..
> The presentation:

(This URL does not work; changing https to http makes it work.)

Nick told me that he updated his slides at the conference, however the
revision available on was/is an older one - not what was
actually presented.  (I expect that it will get updated soon.)

Here's the actual Black Hat presentation:

SHA1(crackstation-njb-bheu08-v2.pdf) = a097aeecfc45426ea55d8610fa25c6a506d7cfd4

Please refer to pages 46 and 47.  As you can see, this currently claims
"only" 80 million of MD5 hash calculations per second, and the reason
for the previous incorrect claims of 1.4 to 1.9 billion hashes per
second was a compiler optimization.  (My guesses: code moved out of the
loop or code dropped because the calculation results were not being used.)

Alexander Peslyak <solar at>
GPG key ID: 5B341F15  fp: B3FB 63F4 D7A3 BCCC 6F6E  FC55 A2FC 027C 5B34 1F15 - bringing security into open computing environments

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