SHA-2
From Just Solve the File Format Problem
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== Details == | == Details == | ||
| − | As of 2012, SHA-2 has six defined-and-approved members, which can be classified into two sub-families | + | As of 2012, SHA-2 has six defined-and-approved members, which can be classified into two sub-families. |
| − | * SHA-256 sub-family | + | * SHA-2 family |
| − | ** '''SHA-224''' (224-bit) | + | ** SHA-256 sub-family |
| − | ** '''SHA-256''' (256-bit) | + | *** '''SHA-224''' (224-bit) |
| − | + | *** '''SHA-256''' (256-bit) | |
| − | * SHA-512 sub-family | + | ** SHA-512 sub-family |
| − | ** '''SHA-512/224''' (224-bit) | + | *** '''SHA-512/224''' (224-bit) |
| − | ** '''SHA-512/256''' (256-bit) | + | *** '''SHA-512/256''' (256-bit) |
| − | ** '''SHA-384''' (384-bit) | + | *** '''SHA-384''' (384-bit) |
| − | ** '''SHA-512''' (512-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 the aforementioned SHA-512/224 and SHA-512/256 for use. | The specification also defines ''t''-bit hashes named SHA-512/''t'', for a wide range of values of ''t'', but it only approves the aforementioned SHA-512/224 and SHA-512/256 for use. | ||
Revision as of 00:03, 27 September 2013
SHA-2 is a family of cryptographic hash functions.
Contents |
Details
As of 2012, SHA-2 has six defined-and-approved members, which can be classified into two sub-families.
- SHA-2 family
- 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)
- SHA-256 sub-family
The specification also defines t-bit hashes named SHA-512/t, for a wide range of values of t, but it only approves the aforementioned 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]) - GNU coreutils → sha224sum, sha256sum, sha384sum, sha512sum
Links
- Wikipedia article
- SHA-512/256 - 2010 report by Gueron, Johnson, Walker
