NIST 800-171 · Identification and Authentication
Requirement 3.5.8
- SPRS weight
- SPRS weight: 1
- POA&M eligibility
- POA&M-eligible
- Assessment objectives
- 2 assessment objectives
Official requirement text
Prohibit password reuse for a specified number of generations.
Assessment objectives
Assessors don’t evaluate the requirement as one sentence; they walk these objectives one by one. Each must be met for the requirement to score.
- 3.5.8[a]the number of generations during which a password cannot be reused is specified.
- 3.5.8[b]reuse of passwords is prohibited during the specified number of generations.
Inside Valontir, this requirement carries a full plain-English guide: what it asks in normal words, what good looks like in a small shop, the evidence an assessor accepts, the common gaps that cost points, and a plain reading of every assessment objective shown above. See it in a demo.