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Secure Hash Algorithm


  The Secure Hash Algorithm defined in Federal Information Processing Standard 180-1.
NIST SP 800-22 Rev. 1a under SHA-1

  A hash function specified in FIPS 180-2, the Secure Hash Standard.
NIST SP 800-89 under SHA-1

  A hash algorithm with the property that it is computationally infeasible 1) to find a message that corresponds to a given message digest, or 2) to find two different messages that produce the same message digest.
CNSSI 4009-2015 from FIPS 180-4