Date: Mon, 14 Apr 2008 13:11:33 +0400 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com 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: > https://www.blackhat.com/presentations/bh-europe-08/Breese/Presentation/bh-eu-08-breese.pdf (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 blackhat.com 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: http://www.security-assessment.com/files/presentations/crackstation-njb-bheu08-v2.pdf 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 openwall.com> GPG key ID: 5B341F15 fp: B3FB 63F4 D7A3 BCCC 6F6E FC55 A2FC 027C 5B34 1F15 http://www.openwall.com - bringing security into open computing environments Was I helpful? Please give your feedback here: http://rate.affero.net/solar -- To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com and reply to the automated confirmation request that will be sent to you.
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