What this requirement asks
Encrypt CUI on mobile devices and mobile computing platforms.
This is a CMMC Level 2 requirement in the Access Control family, drawn from NIST SP 800-171 Rev. 2. An assessor evaluates it objective by objective — every objective below must be supported by evidence, not just described in a policy.
Assessment objectives (2)
- 3.1.19[a] — mobile devices and mobile computing platforms that process, store, or transmit CUI are identified
- 3.1.19[b] — encryption is employed to protect CUI on identified mobile devices and mobile computing platforms
What an assessor examines
Examine:
- Access control policy
- procedures addressing access control for mobile devices
- system design documentation
- system configuration settings and associated documentation
- encryption mechanisms and associated configuration documentation
- system security plan
- system audit logs and records
- other relevant documents or records
Interview:
- Personnel with access control responsibilities for mobile devices
- system or network administrators
- personnel with information security responsibilities
Test:
- Encryption mechanisms protecting confidentiality of information on mobile devices
Evidence that defends it
Show encryption compliance report; escrow keys where applicable
Check your readiness
Score this requirement against your own environment with the Level 2 self-assessment checklist, or estimate your SPRS score with the free CMMC compliance tool. Self-reported answers are planning signals only — they do not establish a verified or assessor-accepted result.