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The MD5 message-digest algorithm is a widely used hash function producing a 128-bit hash value. MD5 was designed by Ronald Rivest in 1991 to replace an earlier hash function MD4, [3] and was specified in 1992 as RFC 1321. MD5 can be used as a checksum to verify data integrity against unintentional corruption.
SHA-1: A 160-bit hash function which resembles the earlier MD5 algorithm. This was designed by the National Security Agency (NSA) to be part of the Digital Signature Algorithm . Cryptographic weaknesses were discovered in SHA-1, and the standard was no longer approved for most cryptographic uses after 2010.
MD5: 128 128 512 64 32 64 ... values [note 5] Computation ... The ECRYPT Hash Function Website – A wiki for cryptographic hash functions; SHA-3 Project ...
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 function RIPEMD: 128 bits hash RIPEMD-128: 128 bits hash RIPEMD-160: 160 bits hash RIPEMD-256: 256 bits hash RIPEMD-320: 320 bits hash SHA-1: 160 bits Merkle ...
Hash function Security claim Best attack Publish date Comment MD5: 2 64: 2 18 time 2013-03-25 This attack takes seconds on a regular PC. Two-block collisions in 2 18, single-block collisions in 2 41. [1] SHA-1: 2 80: 2 61.2: 2020-01-08 Paper by Gaëtan Leurent and Thomas Peyrin [2] SHA256: 2 128: 31 of 64 rounds (2 65.5) 2013-05-28 Two-block ...
This makes the MD5, SHA-1, RIPEMD-160, Whirlpool, and the SHA-256 / SHA-512 hash algorithms all vulnerable to this specific attack. SHA-3, BLAKE2, BLAKE3, and the truncated SHA-2 variants are not vulnerable to this type of attack.
An MD5 hash is a 16-byte value. The HA1 and HA2 values used in the computation of the response are the hexadecimal representation (in lowercase) of the MD5 hashes respectively. RFC 2069 was later replaced by RFC 2617 (HTTP Authentication: Basic and Digest Access Authentication).
For instance, MD5-Crypt uses a 1000 iteration loop that repeatedly feeds the salt, password, and current intermediate hash value back into the underlying MD5 hash function. [4] The user's password hash is the concatenation of the salt value (which is not secret) and the final hash.