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The former decision is original classification. A great majority of classified documents are created by derivative classification. For example, if one piece of information, taken from a secret document, is put into a document along with 100 pages of unclassified information, the document, as a whole, will be secret.
Unclassified is technically not a classification level. Though this is a feature of some classification schemes, used for government documents that do not merit a particular classification or which have been declassified. This is because the information is low-impact, and therefore does not require any special protection, such as vetting of ...
The National Archives and Records Administration houses the National Declassification Center to coordinate reviews and Information Security Oversight Office to promulgate rules and enforce quality measures across all agencies. NARA reviews documents on behalf of defunct agencies and permanently stores declassified documents for public inspection.
Controlled Unclassified designates information that may be illegal to distribute. This information is available when needed by government employees, such as United States Department of Defense (DoD) employees, but the designation signifies that the information should not be redistributed to users not designated to use it on an operational basis.
Unclassified (U) is a valid security description, especially when indicating unclassified information within a document classified at a higher level. For example, the title of a Secret report is often unclassified, and must be marked as such.
Pentagon Papers: Top secret documents of the United States Department of Defense regarding its involvement in the Vietnam War. Afghan War documents leak: Disclosure of a collection of internal U.S. military logs of the War in Afghanistan. Iraq War documents leak: A WikiLeaks disclosure of a collection of 391,832 United States Army field reports.
Sensitive Security Information (SSI) is a category of sensitive but unclassified information under the United States government's information sharing and control rules, often used by TSA and CBP. SSI is information obtained in the conduct of security activities whose public disclosure would, in the judgment of specified government agencies ...
The process of removing previously declassified records was itself covert until it was revealed by the National Security Archive in February 2006. [4] Following outcry by journalists, historians, and the public, an internal audit by the National Archive’s Information Security Oversight Office indicated that more than one-third of the records ...