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NIST SP 800-171A
Also known as: NIST 800-171A · 800-171A
The NIST publication defining the assessment objectives and procedures for evaluating the 110 requirements in NIST SP 800-171. The assessor's playbook.
NIST Special Publication 800-171A is the companion assessment guide to NIST SP 800-171. While 800-171 defines what must be done, 800-171A defines how to evaluate whether it has been done.
For each of the 110 security requirements in 800-171, NIST SP 800-171A breaks the requirement into one or more discrete assessment objectives — specific, testable determination statements that an assessor uses to render a met / not met / not applicable verdict. There are roughly 320 assessment objectives across the 110 requirements.
Every C3PAO assessment is conducted against the 800-171A assessment objectives. Evidence collected by the contractor must map to specific objectives, not just to the parent requirements, for the assessment to proceed efficiently.
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