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  2. SHA-1 - Wikipedia

    en.wikipedia.org/wiki/SHA-1

    In cryptography, SHA-1 (Secure Hash Algorithm 1) ... collisions can be found with complexity 2 61, fewer than the 2 80 for an ideal hash function of the same size. ...

  3. Secure Hash Algorithms - Wikipedia

    en.wikipedia.org/wiki/Secure_Hash_Algorithms

    Cryptographic weaknesses were discovered in SHA-1, and the standard was no longer approved for most cryptographic uses after 2010. 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.

  4. Comparison of cryptographic hash functions - Wikipedia

    en.wikipedia.org/wiki/Comparison_of...

    SHA-1: 1995 SHA-0: Specification: SHA-256 SHA-384 SHA-512: 2002 SHA-224: 2004 SHA-3 (Keccak) 2008 Guido Bertoni Joan Daemen Michaël Peeters Gilles Van Assche: RadioGatún: Website Specification: Streebog: 2012 FSB, InfoTeCS JSC RFC 6986: Tiger: 1995 Ross Anderson Eli Biham: Website Specification: Whirlpool: 2004 Vincent Rijmen Paulo Barreto ...

  5. HMAC - Wikipedia

    en.wikipedia.org/wiki/HMAC

    function hmac is input: key: Bytes // Array of bytes message: Bytes // Array of bytes to be hashed hash: Function // The hash function to use (e.g. SHA-1) blockSize: Integer // The block size of the hash function (e.g. 64 bytes for SHA-1) outputSize: Integer // The output size of the hash function (e.g. 20 bytes for SHA-1) // Compute the block ...

  6. List of hash functions - Wikipedia

    en.wikipedia.org/wiki/List_of_hash_functions

    hash HAS-160: 160 bits hash HAVAL: 128 to 256 bits hash JH: 224 to 512 bits hash LSH [19] 256 to 512 bits wide-pipe Merkle–Damgård construction: MD2: 128 bits hash MD4: 128 bits hash MD5: 128 bits Merkle–Damgård construction: MD6: up to 512 bits Merkle tree NLFSR (it is also a keyed hash function) RadioGatún: arbitrary ideal mangling ...

  7. Cryptographic hash function - Wikipedia

    en.wikipedia.org/wiki/Cryptographic_hash_function

    Collisions against the full SHA-1 algorithm can be produced using the shattered attack and the hash function should be considered broken. SHA-1 produces a hash digest of 160 bits (20 bytes). Documents may refer to SHA-1 as just "SHA", even though this may conflict with the other Secure Hash Algorithms such as SHA-0, SHA-2, and SHA-3.

  8. Hash function security summary - Wikipedia

    en.wikipedia.org/wiki/Hash_function_security_summary

    SHA-1: 2 80: 2 61.2: 2020-01-08 ... For a word size w between 1-64 bits, the hash provides a security claim of 2 9.5w. The attack can find a collision in 2 11w time. [21]

  9. Merkle–Damgård construction - Wikipedia

    en.wikipedia.org/wiki/Merkle–Damgård_construction

    The Merkle–Damgård hash function first applies an MD-compliant padding function to create an input whose size is a multiple of a fixed number (e.g. 512 or 1024) — this is because compression functions cannot handle inputs of arbitrary size. The hash function then breaks the result into blocks of fixed size, and processes them one at a time ...