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Counterintelligence or counter-espionage is the act of seeking and indentifying espionage activities. Spy and secret agent redirect here; for alternate use, see Spy (disambiguation) and Secret agent (disambiguation). ...
Major nations have organizations which perform this role. Methods include surveillance of suspects and their communications, undercover agents, monitoring the behavior of legally accredited 'diplomatic personnel' (some of whom are sometimes actually spies or spy handlers), and similar means. Surveillance is close monitoring of behaviour. ...
Being undercover is disguising ones identity for the purposes of gaining the trust of an individual or organization to learn secret information. ...
When spying is discovered, the agencies usually have arrest power, but it is often more productive to keep a careful eye on them to see what they know, where they go, and who they talk to. Furthermore, disinformation can be used to fool the spies and their sponsors, or make them cease their activities if they learn their information has become unreliable and/or their secrecy has been compromised. The Chicago Police Department arrests a man An arrest is the action of police or other authority, or even in some circumstances a private civilian, to apprehend and take under guard a person who is suspected of committing a crime. ...
Disinformation, in the context of espionage, military intelligence, and propaganda, is the spreading of deliberately false information to mislead an enemy as to ones position or course of action. ...
Counterintelligence agencies
Current MI5 headquarters in Thames House, London MI5—officially called the Security Service—is one of the British secret service agencies. ...
Official FBI Seal The Federal Bureau of Investigation (FBI) is a Federal police force which is the principal investigative arm of the United States Department of Justice (DOJ). ...
The Canadian Security Intelligence Service (CSIS) was founded by an act of the Canadian Parliament, Bill C-9, an Act to Establish the Canadian Security Intelligence Service (CSIS) to be a replacement for the floundering Canadas federal police service, was at one time also responsible for intelligence duties. ...
The Direction de la Surveillance du Territoire (DST; Directorate of Territorial Surveillance) is a directorate of the French National Police operating as a domestic intelligence agency. ...
The FSB (ФСБ) is a state security organisation in Russia. ...
The Komitet Gosudarstvennoy Bezopasnosti listen, or KGB, (Russian: Комите́т Госуда́рственной Безопа́сности; English: Committee for State Security), was the name of the main Soviet Security Agency and intelligence agency, as well as the main secret police agency from March 13, 1954 to November 6, 1991. ...
The Bundesnachrichtendienst (abbreviated as BND) is the foreign intelligence agency of the German government, with roles roughly equivalent to the CIA, the NSA, and to the counterintelligence branch of the FBI. It is headquartered in Pullach near Munich. ...
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