SHA-2
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Revision as of 23:16, 21 May 2013
Contents |
Overview
SHA-2 is a family of cryptographic hash functions. As of 2012, it has six defined members, which can be classified into two sub-families.
SHA-256 sub-family
- SHA-224 (224-bit)
- SHA-256 (256-bit)
SHA-512 sub-family
- SHA-512/224 (224-bit)
- SHA-512/256 (256-bit)
- SHA-384 (384-bit)
- SHA-512 (512-bit)
The specification also defines t-bit hashes named SHA-512/t, for a wide range of values of t, but it only approves SHA-512/224 and SHA-512/256 for use.
Specifications
- FIPS PUB 180-2 (1 Aug. 2002): SHA-256, SHA-384, SHA-512
- FIPS PUB 180-3 (Oct. 2008): Adds SHA-224
- FIPS PUB 180-4 (Mar. 2012): Adds SHA-512/224, SHA-512/256
Software
- OpenSSL (
openssl dgst [-sha224|-sha256|-sha384|-sha512])
