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Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations [including updates as of 06-07-2018]



Ronald S. Ross, Kelley L. Dempsey, Patrick Viscuso, Mark Riddle, Gary Guissanie


[Superseded by SP 800-171 Rev. 2 (February 2020):] The protection of Controlled Unclassified Information (CUI) resident in nonfederal systems and organizations is of paramount importance to federal agencies and can directly impact the ability of the federal government to successfully conduct its assigned missions and business operations. This publication provides federal agencies with a set of recommended security requirements for protecting the confidentiality of CUI when such information is resident in nonfederal systems and organizations; when the nonfederal organization is not collecting or maintaining information on behalf of a federal agency or using or operating a system on behalf of an agency; and where there are no specific safeguarding requirements for protecting the confidentiality of CUI prescribed by the authorizing law, regulation, or governmentwide policy for the CUI category or subcategory listed in the CUI Registry. The security requirements apply to all components of nonfederal systems and organizations that process, store, or transmit CUI, or that provide security protection for such components. The requirements are intended for use by federal agencies in contractual vehicles or other agreements established between those agencies and nonfederal organizations. [Supersedes SP 800-171r1 (February 2018:…- information-systems-and-3]
Special Publication (NIST SP) - 800-171 Rev. 1
Report Number
800-171 Rev. 1


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.


Ross, R. , Dempsey, K. , Viscuso, P. , Riddle, M. and Guissanie, G. (2018), Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations [including updates as of 06-07-2018], Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed June 19, 2024)


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Created June 6, 2018, Updated November 15, 2020