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Algorithm Output size (bits) Internal state size [note 1] Block size Length size Word size Rounds; BLAKE2b: 512 512 1024 128 [note 2]: 64 12 BLAKE2s: 256 256 512 64 [note 3]: 32 10
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.
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.
Crypto-C Micro Edition: 4.1.5 (December 17, 2020; 4 years ago () [7. Micro Edition Suite: 5.0.3 (December 3, 2024; 29 days ago () [8 Crypto-J: 7.0 (September 7, 2022; 2 years ago () [9. 6.3 (April 4, 2023; 20 months ago () [10. cryptlib: Peter Gutmann: C: Yes
SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA) and first published in 2001. [3] [4] They are built using the Merkle–Damgård construction, from a one-way compression function itself built using the Davies–Meyer structure from a specialized block cipher.
BLAKE was submitted to the NIST hash function competition by Jean-Philippe Aumasson, Luca Henzen, Willi Meier, and Raphael C.-W. Phan. In 2008, there were 51 entries. BLAKE made it to the final round consisting of five candidates but lost to Keccak in 2012, which was selected for the SHA-3 algorithm.
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If | M 1 | = | M 2 |, then | Pad(M 1) | = | Pad(M 2) |. If | M 1 | ≠ | M 2 |, then the last block of Pad(M 1) is different from the last block of Pad(M 2). Here, | X | denotes the length of X. With these conditions in place, a collision in the MD hash function exists exactly when there is a collision in the underlying compression function ...