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Computer Security Resource Center

Computer Security Resource Center

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Fresh

Definition(s):

  For a newly generated key, the property of being unequal to any previously used key.
Source(s):
NIST SP 800-38D

  Newly established keying material is considered to be fresh if the probability of being equal to any previously established keying material is acceptably small. The “acceptably small probability” may be application specific.
Source(s):
NIST SP 800-56A Rev. 2 [Superseded]

  Newly established secret keying material that is statistically independent of any previously established keying material.
Source(s):
NIST SP 800-56B Rev. 2

  Newly established keying material is considered to be fresh if the probability of being equal to any previously established keying material is acceptably small. The acceptably small probability may be application specific.
Source(s):
NIST SP 800-56B Rev. 1 [Superseded]