Secure Hash Standard

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The Secure Hash Standard (SHS) is a set of cryptographically secure hash algorithms specified by the National Institute of Standards and Technology (NIST).

The current version of the SHS standard is the document NIST FIPS 180-4,[1] which specifies seven Secure Hash Algorithms: SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224 and SHA-512/256.