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Title: New SHA Functions Boost Crypto On 64-bit Chips Post by: kseistrup on February 19, 2011, 05:49:54 PM The topic “New SHA Functions Boost Crypto On 64-bit Chips” was posted on Slashdot (http://news.slashdot.org/story/11/02/18/2217206/New-SHA-Functions-Boost-Crypto-On-64-bit-Chips), and is talking about FIPS 180-4 (http://csrc.nist.gov/publications/PubsDrafts.html#FIPS-180--4). I haven't been able to retrieve the PDF from CSRC, but the summary caught my attention:
Quote Draft FIPS 180-4 adds a general procedure for creating an initialization hash value and two additional secure hash algorithms: SHA-512/224 and SHA-512/256, and removes a requirement that padding must be done before hash computation begins. SHA-512/224 and SHA-512/256 may be more efficient alternatives to SHA-224 and SHA-256, respectively, on platforms that are optimized for 64-bit operations. Does anyone know if SHA-512/256 produces the same digests as SHA256? If so, the alleged efficiency might be interesting for CPU-miners on 64-bit platforms. Anyone? Cheers, Title: Re: New SHA Functions Boost Crypto On 64-bit Chips Post by: Hal on February 19, 2011, 06:19:12 PM Does anyone know if SHA-512/256 produces the same digests as SHA256? If so, the alleged efficiency might be interesting for CPU-miners on 64-bit platforms. No, it would not. |