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v2026.1714 entries · CC-BY 4.0
Dictionary termTrack DStablev2026.2

Controlled unclassified information (CUI)

United States government information that requires safeguarding or dissemination controls pursuant to law, regulation, or government-wide policy, but is not classified under Executive Order 13526 or the Atomic Energy Act.

ByCASRAI Editorial Board
· Last updated 21 May 2026

Examples

Worked examples

  • Is an instance

    A research contract clause requires the institution to implement NIST SP 800-171 controls because the project involves CUI.

  • Is an instance

    CUI markings on a sponsor-provided dataset trigger restricted handling at the receiving lab.

Counter-examples

Looks similar, but isn't

  • Not an instance

    Information that is publicly released under standard government open-data policies is not CUI.

  • Not an instance

    Classified Secret information is not CUI; it is governed by classified information handling rules.

Editorial commentary

CUI was formalised by Executive Order 13556 (2010) and is overseen by the National Archives and Records Administration. The CUI Registry enumerates categories such as Export Controlled, Privacy, Procurement and Acquisition, and Defense. Researchers working with CUI must follow specified handling, marking, transmission, and destruction requirements, frequently including NIST SP 800-171 controls. Distinguished from classified information by the absence of a formal classification level.

References

  • Executive Order 13556 (2010); NIST SP 800-171; NARA CUI Registry.

Also known as

CUI

Machine-readable encodings

Use in your systems

JATS XML <role> element
xml
<role vocab="credit"
      vocab-identifier="https://casrai.org/dictionary/"
      vocab-term="Controlled unclassified information (CUI)"
      vocab-term-identifier="https://casrai.org/dictionary/term/controlled-unclassified-information-cui" />
Schema.org DefinedTerm (JSON-LD)
json
{
  "@context": "https://schema.org",
  "@type": "DefinedTerm",
  "name": "Controlled unclassified information (CUI)",
  "identifier": "https://casrai.org/dictionary/term/controlled-unclassified-information-cui",
  "description": "United States government information that requires safeguarding or dissemination controls pursuant to law, regulation, or government-wide policy, but is not classified under Executive Order 13526 or the Atomic Energy Act.",
  "inDefinedTermSet": "https://casrai.org/dictionary/domain/research-security/",
  "url": "https://casrai.org/dictionary/term/controlled-unclassified-information-cui",
  "sameAs": [
    "CUI"
  ],
  "license": "https://creativecommons.org/licenses/by/4.0/"
}

Adopted by research universities worldwide

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