HUMINT (human intelligence) is intelligence obtained from human sources: agents, informants, interrogation subjects, liaison contacts, defectors, refugees, and debriefed personnel. It is the oldest intelligence collection discipline and the most dependent on trust, deception, and interpersonal judgment.
HUMINT operates through several distinct modes. Clandestine HUMINT involves the recruitment and running of agents — individuals with access to information who agree (or are coerced) to provide it secretly. Overt HUMINT includes diplomatic reporting, military attache observations, and debriefings of travelers and refugees. Interrogation of prisoners and detainees constitutes another mode, with its own legal and ethical constraints. Liaison relationships between allied intelligence services provide HUMINT through formal sharing arrangements.
The discipline’s strengths are access to intent and context that technical collection cannot provide. A satellite image shows a military formation; a human source can explain why the formation exists and what the commander plans to do with it. Its weaknesses are equally pronounced: human sources can fabricate, can be doubled by the adversary, can be motivated by personal grievance rather than genuine access, and take months or years to develop. Verification of HUMINT is difficult and often requires corroboration from other collection disciplines.
The history of HUMINT is inseparable from the history of espionage. The Stasi’s extensive informant network (documented in Pattern Before Person) represents one of the most intensive domestic HUMINT operations in modern history. The COINTELPRO programs illustrate HUMINT’s application as a tool of domestic political surveillance rather than foreign intelligence — infiltration, informant recruitment, and agent provocateur operations directed against domestic political movements.
Related terms
- SIGINT — technical collection that often complements HUMINT
- counterintelligence — the discipline of detecting and neutralizing adversary HUMINT operations
- OSINT — open-source collection that can corroborate or contradict HUMINT reporting
- attribution — the process HUMINT most directly supports by providing context for adversary intent