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Top Secret is the highest level of classified information. [4] Information is further compartmented so that specific access using a code word after top secret is a legal way to hide collective and important information. [5] Such material would cause "exceptionally grave damage" to national security if made publicly available. [6]
The United States has three levels of classification: Confidential, Secret, and Top Secret. Each level of classification indicates an increasing degree of sensitivity. Thus, if one holds a Top Secret security clearance, one is allowed to handle information up to the level of Top Secret, including Secret and Confidential information. If one ...
A Periodic Reinvestigation is typically required every five years for Top Secret and ten years for Secret/Confidential, depending upon the agency. Access to a compartment of information lasts only as long as the person's need to have access to a given category of information.
A Top Secret, or "TS", clearance, is often given as the result of a Single Scope Background Investigation, or SSBI. Top Secret clearances, in general, afford one access to data that affects national security , counterterrorism / counterintelligence , or other highly sensitive data.
After the United States entered into World War II, Britain changed its security classifications to match those of the U.S..Previously, classifications had included the top classification "Most Secret", but it soon became apparent that the United States did not fully understand the UK's classifications, and classified information appeared in the U.S.'s press.
Historically, the Government Protective Marking Scheme was used by government bodies in the UK; it divides data into UNCLASSIFIED, PROTECT, RESTRICTED, CONFIDENTIAL, SECRET and TOP SECRET. This system was designed for paper-based records; it is not easily adapted to modern government work and is not widely understood.
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The following banner line and portion marking describe a top secret document containing information from the notional SI-GAMMA 1234 subcompartment, the notional SI-MANSION compartment, and the notional TALENT KEYHOLE-BLUEFISH compartment (TK is always abbreviated, because in some cases even the full meaning may be classified, like for BUR ...