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Computer Security Resource Center

Computer Security Resource Center

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    Glossary
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H

Definition(s):

  The hash subkey.
Source(s):
NIST SP 800-38D

  An auxiliary function used in certain key derivation methods. H is either an approved hash function, hash, or an HMAC-hash based on an approved hash function, hash, with a salt value used as the HMAC key.
Source(s):
NIST SP 800-56A Rev. 2 [Superseded]
NIST SP 800-56B Rev. 1 [Superseded]

  In LMS and XMSS, the height of the tree. In XMSSMT, the total height of the multi-tree (the trees at each level have a height of H/D).
Source(s):
NIST SP 800-208