Computer Security Resource Center

Computer Security Resource Center

Computer Security
Resource Center

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key update

Abbreviation(s) and Synonym(s):

None

Definition(s):

  A procedure in which a new cryptographic key is computed as a function of the (old) cryptographic key that it will replace.
Source(s):
NIST SP 800-133 under Key update

  A key-derivation process whereby the derived key replaces the key from which it was derived when the key-derivation process is later repeated.
Source(s):
NIST SP 800-152 under Key update

  A function performed on a cryptographic key in order to compute a new key that is related to the old key.
Source(s):
NIST SP 800-57 Part 1 Rev. 4 under Key update

  A function performed on a cryptographic key in order to compute a new, but related, key.
Source(s):
CNSSI 4009-2015 (NIST SP 800-57 Part 1 Rev. 3)
NIST SP 800-57 Part 1 Rev. 3 under Key update [Superseded]

  A stage in the lifecycle of keying material; alternate storage for operational keying material during its cryptoperiod.
Source(s):
NIST SP 800-57 Part 2 under Key update