For Official Use Only

For Official Use Only (FOUO) is an information security designation used by some governments.

United States

Among U.S. government information, FOUO was primarily used by the U.S. Department of Defense as a handling instruction for Controlled Unclassified Information (CUI) which may be exempt from release under exemptions two to nine of the Freedom of Information Act (FOIA).[1] It is one of the various sub-categorizations for strictly unclassified information which, on 24 February 2012, was officially consolidated as CUI.

Other departments continuing the use of this designation include the Department of Homeland Security.[2]

U.S. Department of Defense

On 24 February 2012, the Under Secretary of Defense for Intelligence published the publicly available DoDM 5200.01 DoD Information Security Program, a four-volume manual consolidating all marking of information on used by the U.S. Department of Defense.[3] Most of the information regarding FOUO was in the now-superseded fourth volume, but the second volume also contains guidelines on FOUO information.

On 6 March 2020, the DoD replaced DoDM 5200.01 Volume 4 with Controlled Unclassified Information (CUI). The term "FOUO" had been defined in DoDM 5200.01 Vol 4. It is no longer in the replacement document except as a reference to not requiring a "U" marking in the banner or footer signifying unclassified information as was required with the "old FOUO marking" (para 3.4.b.(1)).

Australia

For Official Use Only (FOUO) was one of five categories of the Dissemination Limiting Marker (DLM) defined by the Australian Government Information Security Management Guidelines.[4] The guidelines state that FOUO should only be used on unclassified information, when its compromise may cause limited damage to national security, Australian Government agencies, commercial entities or members of the public. However unlike the United States usage, the presence or absence of an FOUO marker expressly does not provide any information about the document's status under the Freedom of Information Act. Since 2018 this has been replaced by OFFICIAL:Sensitive.

See also

References
  1. "DoD Publications". DoD Issuances. US Department of Defense. Archived from the original on 22 August 2008. Retrieved 26 March 2012.
    - "DOD releases New Controlled Unclassified Information Instruction". National Defense Industrial Association. 16 March 2020. Retrieved 14 December 2020.
  2. "SAFEGUARDING SENSITIVE BUT UNCLASSIFIED" (PDF). Department of Homeland Security. Retrieved 8 August 2019.
  3. "Department of Defense MANUAL" (PDF). US Department of Defense. 24 February 2012. Retrieved 8 August 2019.
  4. "Australian Government Information Security Management Guidelines" (PDF). Archived from the original (PDF) on 26 January 2012. Retrieved 21 December 2011.
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