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The National Security Act Of 1947

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Counterintelligence is one of the most vital areas of the United States intelligence system, and is heavily intertwined with our history, laws and ethics. According to the National Security Act of 1947, counterintelligence (CI) is defined as “information gathered and activities conducted to protect against espionage, other intelligence activities, sabotage, or assassinations conducted by or on behalf of foreign governments or elements thereof, foreign organizations or foreign persons, or international terrorist activities.” It consists of five activities and functions: operations, investigations, collection, analysis and production, and functional services. In this aspect, CI is unique in that it is both an activity and its product. U.S. intelligence agencies, including the National Security Agency (NSA) and the Central Intelligence Agency (CIA) collect and analyze both CI information and foreign intelligence. There are many counterintelligence activities that the United States is involved in, as both CI and foreign intelligence play an important role in countering threats to our country’s national security. Among these most controversial and misunderstood activities are counterespionage and disinformation.
Counterespionage
Counterespionage is an important aspect of U.S. counterintelligence that is utilized to combat espionage. Simply put, it can be defined as “espionage directed toward detecting and thwarting enemy espionage and the protection of the nation’s secrets.”

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