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'Unauthorized Disclosure - National Security Council. Central Intelligence Agency... This film relates how to protect classified information from improper disclosure.'
Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/List_of_U.S._security_clearance_terms
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Description
Security clearance levels are used as part of a method to control access to information that should not be freely available to all personnel.
The different organizations in the United States Federal Government use different terminology and lettering, as is discussed below.
Use
Security clearance levels often appear in employment postings for Defense related jobs, and other jobs involving substantial amounts of responsibility, such as air traffic control or nuclear energy positions... security clearances can take up to a year to obtain. In general, most employers look for candidates who hold an active Department of Defense (DoD) collateral clearance or a blanket TS/SCI-cleared (Top Secret / Sensitive Compartmented Information) individual who has a counterintelligence (CI), full-scope polygraph (FSP), also known as expanded scope screening (ESS).
Security levels
Security clearances can be issued by many United States of America government agencies, including the Department of Defense (DoD), the Department of State (DOS), the Department of Homeland Security (DHS), the Department of Energy (DoE), the Department of Justice (DoJ), the National Security Agency (NSA), and the Central Intelligence Agency (CIA). DoD issues more than 80% of all clearances. There are three levels of DoD security clearances:
TOP SECRET – Will be applied to information in which the unauthorized disclosure could reasonably be expected to cause exceptionally grave damage to the national security.
SECRET – Will be applied to information in which the unauthorized disclosure could reasonably be expected to cause serious damage to the national security.
CONFIDENTIAL – Will be applied to information in which the unauthorized disclosure could reasonably be expected to cause damage to the national security.
Additionally, the United States Department of Energy issues two levels of security clearances:
Q Clearance – Allows access to Classified information up to and including TOP SECRET data with the special designation: Restricted Data (TS//RD) and special Q-Cleared "security" areas.
L Clearance – Allows access to Classified information up to and including SECRET data with the special designation: Formerly Restricted Data (S//FRD) and special L-Cleared "limited" areas.
Despite the common misconception, a public trust position is not a security clearance, and is not the same as the confidential designation. Certain positions which require access to sensitive information, but not information which is classified, must obtain this designation through a background check. Public Trust Positions can either be moderate-risk or high-risk.
Information "above Top Secret" is either Sensitive Compartmented Information (SCI) or special access program (SAP) which are phrases used by media. It is not truly "above" Top Secret, since there is no clearance higher than Top Secret. SCI information may be either Secret or Top Secret, but in either case it has additional controls on dissemination beyond those associated with the classification level alone. In order to gain SCI Access, one would need to have a Single Scope Background Investigation (SSBI). Compartments of information are identified by code words. This is one means by which the "need to know" principle is formally and automatically enforced.
In order to have access to material in a particular SCI "compartment", the person must first have the clearance level for the material. The SCI designation is an add-on, not a special clearance level. Someone cleared at the SECRET level for some compartment X cannot see material in compartment X that is classified TOP SECRET. But the reverse is not true: a person cleared for TOP SECRET with access to X material can also access SECRET material in compartment X. The codeword flags for SECRET and TOP SECRET material in every compartment are different, and each codeword is classified at the level it protects (the SECRET codeword for a compartment is itself classified SECRET, etc.)...