LLMResponse MP.L2-3.8.2.a

To assess whether "access to CUI on system media is limited to authorized users" under MP.L2-3.8.2, you need a strategic plan involving different assessment approaches and corresponding evidence types. Here's a prioritized approach:

Prioritization of Assessment Approaches

1. **Examine (C1)**:

  - **Why prioritize?** Examining documents provides concrete evidence that procedures exist to limit access.
  - **Potential Evidence Types**: 
    - Document: Review the system media protection policy, access control policies and procedures, and any records related to user authorization lists. These artifacts provide tangible proof of existing controls.

2. **Interview (C2)**:

  - **Why prioritize?** Interviews can validate that documented processes are understood by personnel responsible for implementing them.
  - **Potential Evidence Types**: 
    - Artifacts: Gather statements or confirmations from personnel with system media protection and information security responsibilities about who is authorized to access CUI.

3. **Test (C3)**:

  - **Why prioritize?** Testing ensures that the documented policies are actively enforced in practice.
  - **Potential Evidence Types**: 
    - Physical Review: Conduct observations of secure storage areas or controlled environments where system media is stored, and verify whether only authorized personnel have access.

Ranking of Evidence Types

1. **Document (I2)**:

  - Highest priority as it provides a direct record of policies and procedures related to authorizing user access to CUI on system media.
  

2. **Artifacts (I1)**:

  - Important for supporting evidence from interviews, including authorization lists or logs confirming who is permitted access.

3. **Physical Review (I3)**:

  - Offers practical validation that physical controls are in place and effectively implemented during storage and handling of CUI.

4. **Screen Share (I4)**:

  - Useful but secondary to the above methods; it can demonstrate live procedures for checking out media or verifying access permissions, providing real-time evidence of process adherence.

Implementation Steps

- Start with a thorough examination of documents related to policies on system media protection and authorized user lists. - Conduct interviews with key personnel responsible for these areas to ensure comprehension and correct application of the documented processes. - Perform tests by conducting physical reviews or observations where CUI is stored, ensuring that access controls are properly enforced in practice.

By following this prioritized approach, you'll be able to effectively gather evidence demonstrating compliance with MP.L2-3.8.2's requirement to limit CUI access on system media to authorized users.