LLMResponse AC.L2-3.1.4.c

Ranking Evidence Types for Assessment Objective [c]

For the assessment objective "[c] access privileges that enable individuals to exercise the duties that require separation are granted to separate individuals," here's the ranking of evidence types supported by assessment objects:

Evidence Type Ranking

1. **Artifacts (highest value)**

  - System access authorization records showing privilege distribution
  - Access control lists demonstrating separation of privileges
  - User account privilege reports showing different access rights
  - System audit logs that record access privilege usage by different individuals

2. **Documents**

  - System configuration documentation showing access privilege assignments
  - Access control matrices mapping privileges to separate individuals
  - Security procedures for granting privileges
  - Privileged account management policies

3. **Screen Share**

  - Live demonstration of access control system showing privilege assignments
  - Viewing access management interfaces that display user privileges
  - Demonstration of attempts to access functions requiring separated duties

4. **Physical Review (lowest value)**

  - Observation of physical access controls that support privilege separation
  - Viewing secured environments where separated privileges are exercised

Assessment Approach Prioritization

For assessment objective [c], I recommend prioritizing the approaches as follows:

1. **Test (highest priority)**

  - Begin by testing mechanisms implementing separation of duties policy
  - Verify that access controls prevent individuals from exercising multiple critical functions
  - Attempt to perform incompatible functions using different accounts
  - This directly demonstrates that access privileges are properly separated

2. **Examine**

  - Review system access authorizations for different individuals
  - Check privilege assignments in access control systems
  - Analyze audit logs to verify proper privilege distribution
  - This documentation confirms the configuration of access controls

3. **Interview**

  - Talk with system administrators who manage access privileges
  - Interview security personnel about privilege separation implementation
  - Discuss with users how they experience access limitations
  - These interviews provide context for understanding how privileges are managed

This prioritization first focuses on testing the actual implementation of privilege separation (which is the most direct evidence for this objective), then examines documentation to verify systematic implementation, and finally confirms through interviews that the process is understood and consistently applied.