Secure Hash Standard

The Secure Hash Algorithms are a family of cryptographic hash functions published by the National Institute of Standards and Technology (NIST) as a U.S. Federal Information Processing Standard (FIPS), including:In the table below, internal state means the 'internal hash sum' after each compression of a data block.All SHA-family algorithms, as FIPS-approved security functions, are subject to official validation by the CMVP, a joint program (Cryptographic Module Validation Program) run by the American National Institute of Standards and Technology (NIST) and the Canadian Communications Security Establishment (CSE).