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- SHA-2 abstract "SHA-2 is a set of cryptographic hash functions (SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256) designed by the U.S. National Security Agency (NSA) and published in 2001 by the NIST as a U.S. Federal Information Processing Standard (FIPS). SHA stands for Secure Hash Algorithm. SHA-2 includes a significant number of changes from its predecessor, SHA-1. SHA-2 currently consists of a set of six hash functions with digests that are 224, 256, 384 or 512 bits.SHA-256 and SHA-512 are novel hash functions computed with 32-bit and 64-bit words, respectively. They use different shift amounts and additive constants, but their structures are otherwise virtually identical, differing only in the number of rounds. SHA-224 and SHA-384 are simply truncated versions of the first two, computed with different initial values. SHA-512/224 and SHA-512/256 are also truncated versions of SHA-512, but the initial values are generated using the method described in FIPS PUB 180-4. The SHA-2 family of algorithms are patented in . The United States has released the patent under a royalty-free license.In 2005, security flaws were identified in SHA-1, namely that a mathematical weakness might exist, indicating that a stronger hash function would be desirable. Although SHA-2 bears some similarity to the SHA-1 algorithm, these attacks have not been successfully extended to SHA-2.Currently, the best public attacks break preimage resistance 52 rounds of SHA-256 or 57 rounds of SHA-512, and collision resistance for 46 rounds of SHA-256, as shown in the "Cryptanalysis and Validation" section below.".
- SHA-2 thumbnail SHA-2.svg?width=300.
- SHA-2 wikiPageExternalLink tkhash.html.
- SHA-2 wikiPageExternalLink sha256-384-512.pdf.
- SHA-2 wikiPageExternalLink shaval.htm.
- SHA-2 wikiPageExternalLink 03.
- SHA-2 wikiPageExternalLink fips-180-4.pdf.
- SHA-2 wikiPageExternalLink index.html.
- SHA-2 wikiPageExternalLink ?f=fips_sha_shs.info.txt.
- SHA-2 wikiPageExternalLink ?f=fips_sha_shs.standard.txt.
- SHA-2 wikiPageExternalLink index.html.
- SHA-2 wikiPageID "1638777".
- SHA-2 wikiPageRevisionID "606604216".
- SHA-2 certification "FIPS PUB 180-4, CRYPTREC, NESSIE".
- SHA-2 cryptanalysis "A 2011 attack breaks preimage resistance for 57 out of 80 rounds of SHA-512, and 52 out of 64 rounds for SHA-256. Pseudo collision attack against up to 46 rounds of SHA-256.".
- SHA-2 designers National_Security_Agency.
- SHA-2 digestSize "224256384".
- SHA-2 hasPhotoCollection SHA-2.
- SHA-2 name "SHA-2".
- SHA-2 publishDate "2001".
- SHA-2 rounds "64".
- SHA-2 series ", SHA-1, SHA-2, SHA-3".
- SHA-2 structure Merkle–Damgård_construction.
- SHA-2 subject Category:Articles_with_example_pseudocode.
- SHA-2 subject Category:Checksum_algorithms.
- SHA-2 subject Category:Cryptographic_hash_functions.
- SHA-2 comment "SHA-2 is a set of cryptographic hash functions (SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256) designed by the U.S. National Security Agency (NSA) and published in 2001 by the NIST as a U.S. Federal Information Processing Standard (FIPS). SHA stands for Secure Hash Algorithm. SHA-2 includes a significant number of changes from its predecessor, SHA-1.".
- SHA-2 label "SHA-2".
- SHA-2 label "SHA-2".
- SHA-2 label "SHA-2".
- SHA-2 label "SHA-2".
- SHA-2 label "SHA-2".
- SHA-2 label "SHA-2".
- SHA-2 label "SHA-2".
- SHA-2 sameAs SHA-2.
- SHA-2 sameAs SHA-2.
- SHA-2 sameAs SHA-2.
- SHA-2 sameAs SHA-2.
- SHA-2 sameAs SHA-2.
- SHA-2 sameAs m.0bm98p8.
- SHA-2 sameAs Q1968605.
- SHA-2 sameAs Q1968605.
- SHA-2 wasDerivedFrom SHA-2?oldid=606604216.
- SHA-2 depiction SHA-2.svg.
- SHA-2 homepage tkhash.html.
- SHA-2 isPrimaryTopicOf SHA-2.