Date: Tue, 13 Nov 2007 09:39:31 +0100 From: Simon Marechal <simon@...quise.net> To: john-users@...ts.openwall.com Subject: Re: bitslice MD5 Solar Designer a écrit : > On page 23, it has a very brief mention that bitslice MD5 "is slow" on > Cell SPUs: "128 adds require 94 instructions." To me, 94 instructions > is not a lot, but perhaps a straightforward 4-way SIMD implementation is > more efficient. As MD4 and its successors have been designed with 32bit efficiency in mind it's no wonder that they work well that way. The CELL processor is a beast and a naive (using a lot of registers ...) MD4 implementation leads to 180M hashes/s. Using the "guess part of the password, reverse a part of the process" trick it's possible to go way past the 200M hashes/s symbolic limit. -- 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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