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  2. List of U.S. security clearance terms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._security...

    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.

  3. National Security Agency - Wikipedia

    en.wikipedia.org/wiki/National_Security_Agency

    The National Security Agency/Central Security Service Cryptologic Memorial honors and remembers the fallen personnel, both military and civilian, of these intelligence missions. It is made of black granite, and has 171 names carved into it, as of 2013. It is located at NSA headquarters. A tradition of declassifying the stories of the fallen was ...

  4. List of intelligence agencies - Wikipedia

    en.wikipedia.org/wiki/List_of_intelligence_agencies

    This is a list of intelligence agencies by country. It includes only currently operational institutions. An intelligence agency is a government agency responsible for the collection, analysis, and exploitation of information in support of law enforcement, national security, military, and foreign policy objectives.

  5. United States Intelligence Community - Wikipedia

    en.wikipedia.org/wiki/United_States_Intelligence...

    The United States Intelligence Community ( IC) is a group of separate U.S. federal government intelligence agencies and subordinate organizations that work both separately and collectively to conduct intelligence activities which support the foreign policy and national security interests of the United States.

  6. Signal Intelligence Service - Wikipedia

    en.wikipedia.org/wiki/Signal_Intelligence_Service

    The Signal Intelligence Service ( SIS) was the United States Army codebreaking division through World War II. It was founded in 1930 to compile codes for the Army. It was renamed the Signal Security Agency in 1943, and in September 1945, became the Army Security Agency. [1] For most of the war it was headquartered at Arlington Hall (former ...

  7. NSA encryption systems - Wikipedia

    en.wikipedia.org/wiki/NSA_encryption_systems

    The National Security Agency took over responsibility for all U.S. Government encryption systems when it was formed in 1952. The technical details of most NSA-approved systems are still classified, but much more about its early systems have become known and its most modern systems share at least some features with commercial products.

  8. Special Activities Center - Wikipedia

    en.wikipedia.org/wiki/Special_Activities_Center

    Special Activities Center. The Special Activities Center ( SAC) is a division of the United States Central Intelligence Agency responsible for covert and paramilitary operations. The unit was named Special Activities Division ( SAD) prior to 2015. [1] Within SAC there are two separate groups: SAC/SOG (Special Operations Group) for tactical ...

  9. United States Army Security Agency - Wikipedia

    en.wikipedia.org/wiki/United_States_Army...

    The United States Army Security Agency (ASA) was the United States Army's signals intelligence branch from 1945 to 1976. [1] The Latin motto of the Army Security Agency was Semper Vigilis (Vigilant Always), which echoes the declaration, often mistakenly attributed to Thomas Jefferson, that "The price of liberty is eternal vigilance." [2] [3]