AC-4(2)—Processing Domains
>Control Description
Use protected processing domains to enforce ⚙organization-defined information flow control policies as a basis for flow control decisions.
>Supplemental Guidance
Protected processing domains within systems are processing spaces that have controlled interactions with other processing spaces, enabling control of information flows between these spaces and to/from information objects. A protected processing domain can be provided, for example, by implementing domain and type enforcement. In domain and type enforcement, system processes are assigned to domains, information is identified by types, and information flows are controlled based on allowed information accesses (i.e., determined by domain and type), allowed signaling among domains, and allowed process transitions to other domains.
>Related Controls
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What formal policies and procedures govern the implementation of AC-4(2) (Processing Domains)?
- •Who are the designated roles responsible for implementing, maintaining, and monitoring AC-4(2)?
- •How frequently is the AC-4(2) policy reviewed and updated, and what triggers policy changes?
- •What training or awareness programs ensure personnel understand their responsibilities related to AC-4(2)?
Technical Implementation:
- •Describe the specific technical mechanisms or controls used to enforce AC-4(2) requirements.
- •What automated tools, systems, or technologies are deployed to implement AC-4(2)?
- •How is AC-4(2) integrated into your system architecture and overall security posture?
- •What configuration settings, parameters, or technical specifications enforce AC-4(2) requirements?
Evidence & Documentation:
- •What documentation demonstrates the complete implementation of AC-4(2)?
- •What audit logs, records, reports, or monitoring data validate AC-4(2) compliance?
- •Can you provide evidence of periodic reviews, assessments, or testing of AC-4(2) effectiveness?
- •What artifacts would you present during a FedRAMP assessment to demonstrate AC-4(2) compliance?
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