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Title: SHA-1 optimization -- 20% less instructions Post by: hackjealousy on December 06, 2012, 06:03:01 PM https://hashcat.net/p12/js-sha1exp_169.pdf
I can verify that the "known optimizations" exist in the public versions of the FPGA bitstreams. (I.e., the unrolled ZTEX core or the fpgaminer core.) The interesting thing is that the author claimed to have found this optimization (he calls it a weakness) in Q1 of 2011. I'd be interested to know if any devices, including the ASICs, are using these optimizations. Title: Re: SHA-1 optimization -- 20% less instructions Post by: Gabi on December 06, 2012, 06:07:06 PM Don't bitcoin use sha-2?
Title: Re: SHA-1 optimization -- 20% less instructions Post by: hackjealousy on December 06, 2012, 06:08:43 PM I can verify that the "known optimizations" exist in the public versions of the FPGA bitstreams. (I.e., the unrolled ZTEX core or the fpgaminer core.) Although I think I confused myself here. As SHA256 is part of SHA-2. :) |