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SHA-2: A family of two similar hash functions, with different block sizes, known as SHA-256 and SHA-512. They differ in the word size; SHA-256 uses 32-bit words where SHA-512 uses 64-bit words. There are also truncated versions of each standard, known as SHA-224, SHA-384, SHA-512/224 and SHA-512/256. These were also designed by the NSA.
512 64 32 3 MD5: 128 128 512 64 32 64 PANAMA: 256 8736 256 – 32 – RadioGatún: Unlimited [note 6] 58 words 19 words [note 7] – 1–64 [note 8] 18 [note 9] RIPEMD: 128 128 512 64 32 48 RIPEMD-128, -256: 128/256 128/256 512 64 32 64 RIPEMD-160: 160 160 512 64 32 80 RIPEMD-320: 320 320 512 64 32 80 SHA-0: 160 160 512 64 32 80 SHA-1: 160 160 ...
up to 512 bits HAIFA structure [17] BLAKE2X: arbitrary HAIFA structure, [17] extendable-output functions (XOFs) design [18] BLAKE3: arbitrary Merkle tree: ECOH: 224 to 512 bits hash FSB: 160 to 512 bits hash GOST: 256 bits hash Grøstl: up to 512 bits hash HAS-160: 160 bits hash HAVAL: 128 to 256 bits hash JH: 224 to 512 bits hash LSH [19] 256 ...
SHA-2 basically consists of two hash algorithms: SHA-256 and SHA-512. SHA-224 is a variant of SHA-256 with different starting values and truncated output. SHA-384 and the lesser-known SHA-512/224 and SHA-512/256 are all variants of SHA-512. SHA-512 is more secure than SHA-256 and is commonly faster than SHA-256 on 64-bit machines such as AMD64.
Algorithm and variant Output size (bits) Internal state size (bits) Block size (bits) Rounds Operations Security against collision attacks (bits) Security against length extension attacks
The scalar and vector cryptographic instruction set extensions for the RISC-V architecture were ratified respectively on 2022 and 2023, which allowed RISC-V processors to implement hardware acceleration for AES, GHASH, SHA-256, SHA-512, SM3, and SM4.
Compute a cryptographic hash (using the SHA-1 and SHA-256 functions, respectively). ES:rSI points to data to compute a hash for, ES:rDI points to a message digest and rCX specifies the number of bytes. rAX should be set to 0 at the start of a calculation. [g] Esther: REP XSHA256: F3 0F A6 D0: REP XSHA384: F3 0F A6 D8
SHA-1 – developed at NSA 160-bit digest, an FIPS standard; the first released version was defective and replaced by this; NIST/NSA have released several variants with longer 'digest' lengths; CRYPTREC recommendation (limited) SHA-256 – NESSIE selection hash function, FIPS 180-2, 256-bit digest; CRYPTREC recommendation