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NIST SP 800-171 Rev. 2

Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations

Date Published: February 2020

Supersedes: SP 800-171 Rev. 1 (06/07/2018)


Ron Ross (NIST), Victoria Pillitteri (NIST), Kelley Dempsey (NIST), Mark Riddle (NARA), Gary Guissanie (IDA)



basic security requirement; contractor systems; Controlled Unclassified Information; CUI Registry; derived security requirement; Executive Order 13556; FIPS Publication 199; FIPS Publication 200; FISMA; NIST Special Publication 800-53; nonfederal systems; security assessment; security control; security requirement; nonfederal organizations
Control Families

Access Control; Awareness and Training; Audit and Accountability; Configuration Management; Identification and Authentication; Maintenance; Media Protection; Physical and Environmental Protection; Personnel Security; System and Communications Protection; System and Information Integrity


No Download Available

Supplemental Material:
None available

Document History:
06/19/19: SP 800-171 Rev. 2 (Draft)
02/21/20: SP 800-171 Rev. 2 (Final)