MP.L2-3.8.1 · Level 2

Protect (i.e., physically control and securely store) system media containing CUI, both paper and…

NIST SP 800-171 Rev 2 · §3.8.1

Protect (i.e., physically control and securely store) system media containing CUI, both paper and digital.

Assessment objectives

From NIST SP 800-171A · 4 objectives must be met to satisfy this control

3.8.1[a] paper media containing CUI is physically controlled.

Examine

[SELECT FROM: System media protection policy; procedures addressing media access restrictions; access control policy and procedures; physical and environmental protection policy and procedures; security plan; media storage facilities; access control records; other relevant documents or records].

Interview

[SELECT FROM: Personnel with system media protection responsibilities; personnel with information security responsibilities; system or network administrators].

Test

[SELECT FROM: Organizational processes for restricting information media; mechanisms supporting or implementing media access restrictions].

3.8.1[b] digital media containing CUI is physically controlled.

Examine

Interview

[SELECT FROM: Personnel with system media protection responsibilities; personnel with information security responsibilities; system or network administrators].

Test

[SELECT FROM: Organizational processes for restricting information media; mechanisms supporting or implementing media access restrictions].

3.8.1[c] paper media containing CUI is securely stored.

Examine

Interview

[SELECT FROM: Personnel with system media protection responsibilities; personnel with information security responsibilities; system or network administrators].

Test

[SELECT FROM: Organizational processes for restricting information media; mechanisms supporting or implementing media access restrictions].

3.8.1[d] digital media containing CUI is securely stored.

Examine

Interview

[SELECT FROM: Personnel with system media protection responsibilities; personnel with information security responsibilities; system or network administrators].

Test

[SELECT FROM: Organizational processes for restricting information media; mechanisms supporting or implementing media access restrictions].

What we look for in practice

The following are placeholder notes that should be refined based on practice experience.

What assessors look for in practice. Documented evidence that this control is implemented across all CUI-handling systems within scope. Specific artifacts vary, but expect requests for written procedures, system configurations, and operational records demonstrating the control is active.

Common failure patterns. Typical issues include incomplete documentation, inconsistent implementation across systems, and missing periodic review records. Refine this section as your practice accumulates direct assessment experience.

Strong evidence looks like. Formal policy referencing this control, technical configurations demonstrating enforcement, periodic review logs with sign-off, and procedures for handling exceptions.

Scoring and POA&M context. 3-point control under the DoD Assessment Methodology. Meaningful but more contained scoring impact. Not POA&M-eligible — must be implemented at assessment time.