Examples of Controlled Unclassified Information (CUI)
Controlled Unclassified Information (CUI) is unclassified information that legally requires safeguarding.
The US National Archives maintains the CUI Registry and provides an authoritative list of applicable safeguarding and/or dissemination authorities, which govern that specific type of CUI.
CUI typically arises when information is developed under government contract or pertains to federal interests. Examples include defense-related technical data, procurement plans, health or privacy regulated data (e.g. PHI) and infrastructure design documents. While unclassified, CUI demands enhanced handling under frameworks including NIST 800 171 and in some cases NIST SP 800-172.