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History
Redaction
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Redaction or sanitization is the process of removing sensitive information from a document so that it may be distributed to a broader audience. It is intended to allow the selective disclosure of information. Typically, the result is a document that is suitable for publication or for dissemination to others rather than the intended audience of the original document.
A 1953 US government document that has been redacted prior to release.
A 1953 US government document that has been redacted prior to release.
A heavily redacted page from a 2004 lawsuit filed by the ACLU — American Civil Liberties Union v. Ashcroft
A heavily redacted page from a 2004 lawsuit filed by the ACLU — American Civil Liberties Union v. Ashcroft
A page of a classified document that has been sanitized for public release. This is page 13 of a U.S. National Security Agency report [1] Archived 200
A page of a classified document that has been sanitized for public release. This is page 13 of a U.S. National Security Agency report [1] Archived 2004-03-13 at the Wayback Machine on the USS Liberty incident, which was declassified and released to the public in July 2003. Classified information has been blocked out so that only the unclassified information is visible. Notations with leader lines at top and bottom cite statutory authority for not declassifying certain sections. Click on the image to enlarge.
Classified information
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Classified information is material that a government body deems to be sensitive information that must be protected. Access is restricted by law or regulation to particular groups of people with the necessary security clearance and need to know. Mishandling of the material can incur criminal penalties.
A typical classified document. Page 13 of a U.S. National Security Agency report on the USS Liberty incident, partially declassified and released to t
A typical classified document. Page 13 of a U.S. National Security Agency report on the USS Liberty incident, partially declassified and released to the public in July 2004. The original overall classification of the page, "top secret", and the Special Intelligence code word "umbra", are shown at top and bottom. The classification of individual paragraphs and reference titles is shown in parentheses—there are six different levels on this page alone. Notations with leader lines at top and bottom cite statutory authority for not declassifying certain sections.
KGB's "List of traitors to the Motherland, agents of foreign intelligence, and other wanted state criminals" (1979) seen in the Museum of Genocide Vic
KGB's "List of traitors to the Motherland, agents of foreign intelligence, and other wanted state criminals" (1979) seen in the Museum of Genocide Victims, Vilnius: originally marked top secret
Facsimile of the cover page from an East German operation manual for the M-125 Fialka cipher machine. The underlined classification markings can be tr
Facsimile of the cover page from an East German operation manual for the M-125 Fialka cipher machine. The underlined classification markings can be translated as "Cryptologic material! Secret restricted material" de:Verschlusssache.
A building in Wuhan housing provincial offices for dealing with foreign countries, etc. The red slogan says, "Protection of national secrets is a duty
A building in Wuhan housing provincial offices for dealing with foreign countries, etc. The red slogan says, "Protection of national secrets is a duty of every citizen".