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The updated standard included the original SHA-1 algorithm, with updated technical notation consistent with that describing the inner workings of the SHA-2 family. [4] In February 2004, a change notice was published for FIPS PUB 180-2, specifying an additional variant, SHA-224, defined to match the key length of two-key Triple DES. [7]
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.
Algorithm and variant Output size (bits) Internal ... Or, Rot, Add (mod 2 32) ≤ 18 (collisions found) [2] 0: 4.99: 55.00: 1992 ... SHA-2: SHA-224 SHA-256: 224 256: ...
This can be done as simply as discarding half of the last 2n-bit output. SHA-512/224 and SHA-512/256 take this form since they are derived from a variant of SHA-512. SHA-384 and SHA-224 are similarly derived from SHA-512 and SHA-256, respectively, but the width of their pipe is much less than 2n.
Bernstein's hash djb2 [2] 32 or 64 bits shift/add or mult/add or shift/add/xor or mult/xor PJW hash / Elf Hash: 32 or 64 bits add,shift,xor MurmurHash: 32, 64, or 128 bits product/rotation Fast-Hash [3] 32 or 64 bits xorshift operations SpookyHash 32, 64, or 128 bits see Jenkins hash function: CityHash [4] 32, 64, 128, or 256 bits FarmHash [5 ...
Data from millions of people revealed that semaglutide takers with type 2 diabetes were 70 percent less likely to develop Alzheimer’s disease than people with diabetes who took only insulin ...
Secure Hash Algorithm (SHA) Algorithm for computing a condensed representation of information FIPS PUB 180-4: Use SHA-384 or SHA-512 for all classification levels. Leighton-Micali Signature (LMS) Asymmetric algorithm for digitally signing firmware and software NIST SP 800-208: All parameters approved for all classification levels. SHA256/192 ...