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AC-4(14)—Security Or Privacy Policy Filter Constraints

>Control Description

When transferring information between different security domains, implement ⚙organization-defined security or privacy policy filters requiring fully enumerated formats that restrict data structure and content.

>Supplemental Guidance

Data structure and content restrictions reduce the range of potential malicious or unsanctioned content in cross-domain transactions. Security or privacy policy filters that restrict data structures include restricting file sizes and field lengths. Data content policy filters include encoding formats for character sets, restricting character data fields to only contain alpha-numeric characters, prohibiting special characters, and validating schema structures.

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

  • •What formal policies and procedures govern the implementation of AC-4(14) (Security Or Privacy Policy Filter Constraints)?
  • •Who are the designated roles responsible for implementing, maintaining, and monitoring AC-4(14)?
  • •How frequently is the AC-4(14) policy reviewed and updated, and what triggers policy changes?
  • •What training or awareness programs ensure personnel understand their responsibilities related to AC-4(14)?

Technical Implementation:

  • •Describe the specific technical mechanisms or controls used to enforce AC-4(14) requirements.
  • •What automated tools, systems, or technologies are deployed to implement AC-4(14)?
  • •How is AC-4(14) integrated into your system architecture and overall security posture?
  • •What configuration settings, parameters, or technical specifications enforce AC-4(14) requirements?

Evidence & Documentation:

  • •What documentation demonstrates the complete implementation of AC-4(14)?
  • •What audit logs, records, reports, or monitoring data validate AC-4(14) compliance?
  • •Can you provide evidence of periodic reviews, assessments, or testing of AC-4(14) effectiveness?
  • •What artifacts would you present during a FedRAMP assessment to demonstrate AC-4(14) compliance?

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