None
To remove all traces of keying material so that it cannot be recovered by either physical or electronic means.
Source(s):
NIST SP 800-57 Part 1 Rev. 4
[Superseded]
NIST SP 800-57 Part 1 Rev. 3
[Superseded]
To remove all traces of a cryptographic key so that it cannot be recovered by either physical or electronic means.
Source(s):
NIST SP 800-57 Part 1 Rev. 5