NIST SP 800-171 Rev 3NIST SP 800-161 Rev 1

NIST SP 800-171 Rev 3 covers 38.2% of NIST SP 800-161 Rev 1

73 of the 191 controls in NIST SP 800-161 Rev 1 are already satisfied by evidence you collected for NIST SP 800-171 Rev 3. 118 are genuine gaps. Every claim below was judged against both control sets and then argued against; the ones that did not survive are published further down with the reason each failed.

38.2%

of the target already covered

controls evidenced

118

genuine gaps

claims rejected in review

This number is directional. It says how much of NIST SP 800-161 Rev 1 your NIST SP 800-171 Rev 3 evidence satisfies. The reverse pair is a different number, often very different, because a security standard has enormous depth for access control and almost none for lawful basis or data subject rights.

101 candidate mappings were examined and 0 were removed. Signed off 2026-08-19, review level machine verified. Mappings were judged by Claude Code rather than read line by line by a practitioner. Every claim shows its reasoning so you can check it. Ask and a practitioner will review this pair.

Where the gaps are

Coverage is never evenly spread. A source standard usually satisfies one part of a target almost completely and barely touches another, and which part is which is the thing worth knowing before you plan the work.

C-SCRM Family: Incident Response7 of 9 evidenced, 2 to do

C-SCRM Family: Media Protection3 of 4 evidenced, 1 to do

C-SCRM Family: Personnel Security3 of 4 evidenced, 1 to do

C-SCRM Family: Access Control10 of 14 evidenced, 4 to do

C-SCRM Family: System and Information Integrity5 of 8 evidenced, 3 to do

C-SCRM Family: Configuration Management8 of 14 evidenced, 6 to do

C-SCRM Family: Identification and Authentication4 of 7 evidenced, 3 to do

C-SCRM Family: Physical and Environmental Protection4 of 9 evidenced, 5 to do

C-SCRM Family: System and Communications Protection6 of 14 evidenced, 8 to do

C-SCRM Family: Supply Chain Risk Management5 of 13 evidenced, 8 to do

C-SCRM Family: Maintenance3 of 8 evidenced, 5 to do

C-SCRM Family: Assessment, Authorization, and Monitoring2 of 6 evidenced, 4 to do

C-SCRM Family: Planning2 of 7 evidenced, 5 to do

C-SCRM Family: Risk Assessment2 of 7 evidenced, 5 to do

C-SCRM Family: System and Services Acquisition4 of 15 evidenced, 11 to do

C-SCRM Family: Audit and Accountability2 of 9 evidenced, 7 to do

C-SCRM Family: Program Management3 of 30 evidenced, 27 to do

C-SCRM Family: Awareness and Training0 of 4 evidenced, 4 to do

C-SCRM Family: Contingency Planning0 of 8 evidenced, 8 to do

C-SCRM Family: Personally Identifiable Information Processing and Transparency0 of 1 evidenced, 1 to do

Theme level, not control level, deliberately. The per-control list of what is evidenced and what is a gap is the report itself, so publishing it here would be publishing the thing being sold.

Claims that held

A sample. Each one names the control whose evidence does the work, the control it satisfies, and why.

03.15.01AC-1argued against and upheld

Policy and Procedures

Access control family policy and procedures are explicitly required and reviewed.

03.01.12AC-17argued against and upheld

Remote Access

Remote access is authorized, restricted and routed through managed control points.

03.01.16AC-18argued against and upheld

Wireless Access

Wireless access is authorized and protected with authentication and encryption.

03.01.18AC-19argued against and upheld

Access Control for Mobile Devices

Mobile device configuration and connection requirements with CUI encryption.

03.01.01AC-2argued against and upheld

Account Management

Account management defines all account types including those created for external work.

03.01.20AC-20argued against and upheld

Use of External Systems

Terms and conditions for external system use is precisely this requirement.

03.01.22AC-22argued against and upheld

Publicly Accessible Content

Authorized posters, training and review of content before public release.

03.01.02AC-3argued against and upheld

Access Enforcement

Enforces approved authorizations for logical access to CUI and system resources.

Claims that did not hold

Nothing proposed for this pair was rejected in review. That is unusual and worth knowing rather than hiding: it means the candidate set was small and every candidate held.

The full report

Everything above is a sample. The report is every evidenced control and every gap, with the reasoning and the source document behind each one, in a form you can hand to an assessor. $299, emailed immediately.

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