SHA-2
From Just Solve the File Format Problem
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== Software == | == Software == | ||
| − | * [ | + | * [[OpenSSL]] (<code>openssl dgst [-sha224|-sha256|-sha384|-sha512]</code>) |
* [http://www.gnu.org/software/coreutils/ GNU coreutils] → [http://www.gnu.org/software/coreutils/manual/html_node/sha2-utilities.html sha224sum, sha256sum, sha384sum, sha512sum] | * [http://www.gnu.org/software/coreutils/ GNU coreutils] → [http://www.gnu.org/software/coreutils/manual/html_node/sha2-utilities.html sha224sum, sha256sum, sha384sum, sha512sum] | ||
Revision as of 20:16, 29 January 2016
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
See also
Links
- Wikipedia article
- SHA-512/256 - 2010 report by Gueron, Johnson, Walker
- Towards the Perfect Coin Flip: The NIST Randomness Beacon (uses SHA512)
