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 is 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 through 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 using 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, a four-volume manual consolidating all marking of information used by the U.S. Department of Defense.[3] There is a lot more information on the marking, access, and protection of "For Official Use Only" information. Most of the information is in the fourth volume, but the second volume also contains guidelines on FOUO information.

On March 6, 2020 the DoD replaced DoDM 5200.01 Volume 4 with DoDI 5200.48. The term "FOUO" had been defined in DoDM 5200.01 Vol 4. It is no longer in the replacement document DoDI 5200.48 except as reference as 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) is 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.

gollark: * radii, and maybe
gollark: Anyway, I am considering overhauling the Random Stuff API Current Song Protocol™ for OIR™'s frontend to run over websocket, allowing:- somewhat better performance maybe possibly- live chat about how much you hate a song
gollark: It used to be called the amplitude processing index observation horizontal technology turnover platform.
gollark: Actually, it's the apionic/pythonic internet octet host ternary transmission protocol.
gollark: I keep mistyping it as apiohttp.

See also

References
  1. "Archived copy". Archived from the original on 2008-08-22. Retrieved 2012-03-26.CS1 maint: archived copy as title (link)
  2. "SAFEGUARDING SENSITIVE BUT UNCLASSIFIED" (PDF). www.dhs.gov. Retrieved 2019-08-08.
  3. "Department of Defense MANUAL" (PDF). www.esd.whs.mil. February 24, 2012. Retrieved 2019-08-08.
  4. "Australian Government Information Security Management Guidelines" (PDF). Archived from the original (PDF) on 2012-01-26. Retrieved 2011-12-21.
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