AC-4(13)—Decomposition Into Policy-Relevant Subcomponents
>Control Description
When transferring information between different security domains, decompose information into ⚙organization-defined policy-relevant subcomponents for submission to policy enforcement mechanisms.
>Cross-Framework Mappings
>Supplemental Guidance
Decomposing information into policy-relevant subcomponents prior to information transfer facilitates policy decisions on source, destination, certificates, classification, attachments, and other security- or privacy-related component differentiators. Policy enforcement mechanisms apply filtering, inspection, and/or sanitization rules to the policy-relevant subcomponents of information to facilitate flow enforcement prior to transferring such information to different security domains.
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What formal policies and procedures govern the implementation of AC-4(13) (Decomposition Into Policy-Relevant Subcomponents)?
- •Who are the designated roles responsible for implementing, maintaining, and monitoring AC-4(13)?
- •How frequently is the AC-4(13) policy reviewed and updated, and what triggers policy changes?
- •What training or awareness programs ensure personnel understand their responsibilities related to AC-4(13)?
Technical Implementation:
- •Describe the specific technical mechanisms or controls used to enforce AC-4(13) requirements.
- •What automated tools, systems, or technologies are deployed to implement AC-4(13)?
- •How is AC-4(13) integrated into your system architecture and overall security posture?
- •What configuration settings, parameters, or technical specifications enforce AC-4(13) requirements?
Evidence & Documentation:
- •What documentation demonstrates the complete implementation of AC-4(13)?
- •What audit logs, records, reports, or monitoring data validate AC-4(13) compliance?
- •Can you provide evidence of periodic reviews, assessments, or testing of AC-4(13) effectiveness?
- •What artifacts would you present during a FedRAMP assessment to demonstrate AC-4(13) compliance?
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