Modern tactics of espionage and dedicated government intelligence agencies developed over the course of the late-19th century. A … See more

Collective counterintelligence is gaining information about an opponent's intelligence collection capabilities whose aim is at an entity. See more

Frank Wisner, a well-known CIA operations executive said of the autobiography of Director of Central Intelligence See more

Offensive techniques in current counterintelligence doctrine are principally directed against human sources, so counterespionage can be considered a synonym for offensive counterintelligence. At the heart of exploitation operations is the objective to … See more

Many governments organize counterintelligence agencies separately and distinct from their intelligence collection services. In most countries the counterintelligence mission is spread over multiple organizations, though one usually predominates. … See more

In U.S. doctrine, although not necessarily that of other countries, CI is now seen as primarily a counter to FIS HUMINT. In the 1995 US Army counterintelligence manual, CI had a broader … See more

• Johnson, William R. Thwarting Enemies at Home and Abroad: How to Be a Counterintelligence Officer (2009)
• Ginkel, B. van (2012). "Towards the intelligent use of intelligence: Quis Custodiet ipsos Custodes?". Terrorism and Counter … See more