Search results
Results from the WOW.Com Content Network
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. There are also ...
And, Xor, Or, Rot, Add (mod 2 32) < 34 (collisions found) 0: ≈ SHA-1: ≈ SHA-1: 1993 SHA-1 < 63 (collisions found) [3] 3.47: 52.00: 1995 SHA-2: SHA-224 SHA-256: 224 256: 256 (8 × 32) 512: 64: And, Xor, Or, Rot, Shr, Add (mod 2 32) 112 128: 32 0: 7.62 7.63: 84.50 85.25: 2004 2001 SHA-384: 384: 512 (8 × 64) 1024: 80: And, Xor, Or, Rot, Shr ...
The RIPE Consortium [1] MD4: RIPEMD-128 RIPEMD-256 RIPEMD-160 RIPEMD-320: 1996 Hans Dobbertin Antoon Bosselaers Bart Preneel: RIPEMD: Website Specification: SHA-0: 1993 NSA: SHA-0: 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 ...
As of October 2012, CNSSP-15 [4] stated that the 256-bit elliptic curve (specified in FIPS 186-2), SHA-256, and AES with 128-bit keys are sufficient for protecting classified information up to the Secret level, while the 384-bit elliptic curve (specified in FIPS 186-2), SHA-384, and AES with 256-bit keys are necessary for the protection of Top ...
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.
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.
FIPS PUB 140-2 Security Requirements for Cryptographic Modules 2001, defines four increasing security levels; FIPS PUB 171 Key Management Using ANSI X9.17 (ANSI X9.17-1985) 1992, based on DES; FIPS PUB 180-2 Secure Hash Standard (SHS) 2002 defines the SHA family; FIPS PUB 181 Automated Password Generator (APG) 1993
As of 2017, collisions but not preimages can be found in MD5 and SHA-1. The future is therefore likely to bring increasing use of newer hash functions such as SHA-256 . However, fingerprints based on SHA-256 and other hash functions with long output lengths are more likely to be truncated than (relatively short) MD5 or SHA-1 fingerprints.