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SI-4(18)—Information System Monitoring

Operational

>Control Description

INFORMATION SYSTEM MONITORING | ANALYZE TRAFFIC / COVERT EXFILTRATION The organization analyzes outbound communications traffic at the external boundary of the information system (i.e., system perimeter) and at ⚙organization-defined interior points within the system (e.g., subsystems, sub-networks) to detect covert exfiltration of information.

>Supplemental Guidance

Covert means that can be used for the unauthorized exfiltration of organizational information include, for example, steganography.

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