The time period during which the security of the data needs to be protected (e.g., its confidentiality, integrity or availability).
Source(s):
NIST SP 800-57 Part 1 Rev. 5
NIST SP 800-57 Part 1 Rev. 3
[Superseded]
NIST SP 800-57 Part 1 Rev. 4
[Superseded]