SC.L2-3.13.8 — Encrypt CUI in transit unless otherwise protected
Implement cryptographic mechanisms to prevent unauthorized disclosure of CUI during transmission unless otherwise protected by alternative physical safeguards.
Verbatim NIST SP 800-171 Rev 2 requirement text (3.13.8).
How it's scored
3 points deducted from your SPRS score if unmet.
An open gap here is not POA&M-eligible (only 1-point requirements qualify under 32 CFR 170.21, with one narrow exception at SC.L2-3.13.11): it must be fully implemented before a Level 2 assessment can certify.
What an assessor checks: the 3 assessment objectives
NIST SP 800-171A determination statements, verbatim. A CMMC Level 2 assessor marks SC.L2-3.13.8 MET only when every applicable objective is satisfied — and examines evidence, not assertions.
| Objective | Determination statement |
|---|---|
| 3.13.8[a] | cryptographic mechanisms intended to prevent unauthorized disclosure of CUI are identified. |
| 3.13.8[b] | alternative physical safeguards intended to prevent unauthorized disclosure of CUI are identified. |
| 3.13.8[c] | either cryptographic mechanisms or alternative physical safeguards are implemented to prevent unauthorized disclosure of CUI during transmission. |
Where do you stand on SC.L2-3.13.8?
The free Muster Score walks all 110 requirements — including every objective above — and computes your exact SPRS score in your browser. No signup, no upload, and your answers never leave your device.
Get your free Muster Score →Requirement and objective text: NIST SP 800-171 Rev 2 / SP 800-171A (verbatim). Scoring: DoD Assessment Methodology v1.2.1; POA&M eligibility: 32 CFR 170.21. Muster is independent and not affiliated with the U.S. Department of Defense or the Cyber AB; this page is compliance information, not legal advice or a certification.