Definition
Controlled Unclassified Information (CUI) is a designation for information that requires safeguarding or dissemination controls by law, regulation, or government-wide policy. It is not classified information but requires protection against unauthorized disclosure. CUI applies to information that, if compromised, could adversely affect national interests or individuals. In practice, CUI dictates specific handling procedures, storage requirements, and access limitations for sensitive data. Understanding CUI is crucial for personnel working with government data to prevent breaches and maintain compliance. For instance, a contractor handling unclassified but sensitive research data must adhere to CUI regulations for its storage and transmission. CUI is distinct from publicly available information, which has no such protective requirements. This concept is frequently assessed in cybersecurity certifications like Security+ and CySA+.