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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
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. These were also designed by the NSA. SHA-3 : A hash function formerly called Keccak , chosen in 2012 after a public competition among non-NSA designers.
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 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 BLAKE2b Input: M Message to be hashed cbMessageLen: Number, (0..2 128) Length of the message in bytes Key Optional 0..64 byte key cbKeyLen: Number, (0..64) Length of optional key in bytes cbHashLen: Number, (1..64) Desired hash length in bytes Output: Hash Hash of cbHashLen bytes Initialize State vector h with IV h 0..7 ← IV 0..7 ...
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[1] [2] [3] Truncated versions of SHA-2, including SHA-384 and SHA-512/256 are not susceptible, [4] nor is the SHA-3 algorithm. [5] HMAC also uses a different construction and so is not vulnerable to length extension attacks. [6] Lastly, just performing Hash(message ‖ secret) is enough to not be affected.
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