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Top Secret is the highest level of classification. However some information is further categorized/marked by adding a code word so that only those who have been cleared for each code word can see it. A document marked SECRET (CODE WORD) could be viewed only by a person with a secret or top secret clearance and that specific code word clearance.
T3 or T3R - Tier 3 or Tier 3 Reinvestigation, now replace all NACLC. T5 and T5R - Tier 5 or Tier 5 Reinvestigation, now replace SSBI and SBPR respectively. Yankee White – An investigation required for personnel working with the President and Vice President of the United States. Obtaining such clearance requires, in part, an SSBI.
the identity of confidential source of information, intelligence or assistance to the Government of Canada. tools used for information gathering or intelligence. the object of a covert investigation, or a covert collection of information or intelligence. the identity of any person who is under covert surveillance.
It is possible that the term itself, supposedly suggested by Winston Churchill, was a "backronym"—a phrase created to fit an acronym such as the existing "To Gibraltar" code. The list of personnel cleared to know details of Overlord was known as the BIGOT list, and the people on it were known as "Bigots". The details of the invasion plan were ...
Sensitive compartmented information. Sensitive compartmented information ( SCI) is a type of United States classified information concerning or derived from sensitive intelligence sources, methods, or analytical processes. All SCI must be handled within formal access control systems established by the Director of National Intelligence.
Compartmentalization, in information security, whether public or private, is the limiting of access to information to persons or other entities on a need-to-know basis to perform certain tasks. It originated in the handling of classified information in military and intelligence applications. It dates back to antiquity, and was successfully used ...
Code word (figure of speech), designed to convey a predetermined meaning to a receptive audience, while remaining inconspicuous to others. Procedure word, in voice communication. Code word, an element of a codebook designed so that the meaning of the code word is opaque without the code book. Code name, a clandestine name or cryptonym used to ...
United States. In the United States, a security clearance is an official determination that an individual may access information classified by the United States Government. Security clearances are hierarchical; each level grants the holder access to information in that level and the levels below it.