Controlled Unclassified Information (NIST SP 800-171) FoundationOverview The NIST SP 800 171 security requirements represent a subset of the controls that are necessary to protect the confidentiality of CUI. The Controlled Unclassified Information (NIST SP 800 171) Foundation is a certification intended for IT professionals seeking to validate their knowledge of the NIST SP 800 171. The exam is fully based on and aligned with the latest revision of NIST SP 800 171 (Revision 3). Exam Content The exam covers topics