The National Institute of Standards and Technology (NIST) has released an initial public draft of NIST SP 800-171, Revision 3, Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations. Compliance with the security controls in NIST SP 800-171 is required for Department of Defense contractors and is expected to be incorporated into a new Federal Acquisition Regulation (FAR) clause and required for all federal contractors that process, store, or transmit Controlled Unclassified Information (CUI).
