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Countersurveillance refers to measures that are usually undertaken by the public to prevent surveillance, [1] including covert surveillance.Countersurveillance may include electronic methods such as technical surveillance counter-measures, which is the process of detecting surveillance devices.
Many additional types and techniques of covert interrogation and surveillance exist, and covert interrogation can occur for other various reasons, and by other types of actors. The term covert interrogation also refers to interrogation techniques that may be overt in manner, but are hidden [ 2 ] from public, media, governmental, and other types ...
A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance , espionage and police investigations.
As the name suggests, human intelligence is mostly collected by people and is commonly provided via espionage or some other form of covert surveillance. However, there are also overt methods of collection, such as via interrogation of subjects or simply through interviews.
Mr. Big (sometimes known as the Canadian technique) is a covert investigation procedure used by undercover police to elicit confessions from suspects in cold cases (usually murder). Police officers create a fictitious grey area or criminal organization and then seduce the suspect into joining it.
Teaching countersurveillance techniques to agents is a calculated risk. [11] While it may be perfectly valid for an agent to abort a drop or other relatively innocent action, even at the cost of destroying valuable collected material, it is much more dangerous to teach the agent to elude active surveillance.