The time span during which a specific key is authorized for use or in which the keys for a given system or application may remain in effect.
Source(s):
NIST SP 800-133 [Superseded]
NIST SP 800-133 Rev.1 [Superseded]
NIST SP 800-152
NIST SP 800-57 Part 1 Rev. 4 [Superseded]
NIST SP 800-57 Part 2 [Superseded]
NIST SP 800-57 Part 2 Rev.1
NIST SP 800-57 Part 1 Rev. 5
NIST SP 800-57 Part 1 Rev. 3 [Superseded]

  Time span during which each key setting remains in effect.
Source(s):
NIST SP 800-32

  The time span during which a specific key is authorized for use or in which the keys for a given system may remain in effect.
Source(s):
NIST SP 800-175B Rev. 1