Valontir

NIST 800-171 · Identification and Authentication

Requirement 3.5.5

SPRS weight
SPRS weight: 1
POA&M eligibility
POA&M-eligible
Assessment objectives
2 assessment objectives

Official requirement text

Prevent reuse of identifiers for a defined period.

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.

  1. 3.5.5[a]a period within which identifiers cannot be reused is defined.
  2. 3.5.5[b]reuse of identifiers is prevented within the defined period.

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.