DISCUSSION [NIST SP 800-171 R2]
Password lifetime restrictions do not apply to temporary passwords.
FURTHER DISCUSSION
Individuals may not reuse their passwords for a defined period of time and a set number of passwords generated.
Example
You explain in your company’s security policy that changing passwords regularly provides increased security by reducing the ability of adversaries to exploit stolen or purchased passwords over an extended period. You define how often individuals can reuse their passwords and the minimum number of password generations before reuse [a]. If a user tries to reuse a password before the number of password generations has been exceeded, an error message is generated, and the user is required to enter a new password [b].
Potential Considerations
How many generations of password changes need to take place before a password can be reused [a]?
Copyright
Copyright 2020, 2021 Carnegie Mellon University and The Johns Hopkins University Applied Physics Laboratory LLC.
Copyright 2021 Futures, Inc.
This material is based upon work funded and supported by the Department of Defense under Contract No. FA8702-15-D-0002 with Carnegie Mellon University for the operation of the Software Engineering Institute, a federally funded research and development center, and under Contract No. HQ0034-13-D-0003 and Contract No. N00024-13-D-6400 with the Johns Hopkins University Applied Physics Laboratory LLC, a University Affiliated Research Center.
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