Committee on National Security Systems Instruction. Pertains to critical national security systems, often linked to ICD and aligns with NIST 800-53 controls.

Applicability: Relevant in national security systems (e.g. Confidential, Secret), highly sensitive government infrastructure.

For NSS, where differences between the NIST documentation and this Instruction occur, this Instruction takes precedence.


URL: CNSSI Information

CNSSI_No1253.pdf (

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