NIST SP 800-171
NIST SP 800-171 defines the cybersecurity requirements for protecting Controlled Unclassified Information (CUI) in non-federal systems. These requirements are contractually enforced through DFARS clauses and form the technical foundation of CMMC 2.0.
Compliance requires more than implementing technical controls. Organizations must demonstrate that policies, procedures, and operational practices consistently protect CUI and can be validated through documented evidence.


