HUMINT

HUMINT — human intelligence — is intelligence derived from human sources, as distinct from signals intelligence (SIGINT), imagery intelligence (IMINT), measurement and signature intelligence (MASINT), open-source intelligence (OSINT), and geospatial intelligence (GEOINT). The category covers a wide range of activity: case officers operating under cover meeting recruited agents, debriefings of defectors and walk-ins, liaison exchanges with foreign services, the interrogation of detainees, and the formal interview of travellers and emigrants.

The discipline is the oldest, the most politically sensitive, and the most labour-intensive form of intelligence collection. Where signals collection scales with technical capacity, human collection scales with the number of trained officers willing and able to operate under cover, the number of access agents in position to introduce them to potential recruits, and the operating space available in the target environment. A single productive recruitment can take years to develop and may produce intelligence for decades; the same recruitment, if discovered, can produce a counter-intelligence loss measured in lives.

The collection process is conventionally described as a cycle: spotting (identifying a person with access to information of intelligence value), assessing (evaluating their motivation, vulnerability, and reliability), developing (cultivating a relationship that opens the possibility of recruitment), recruiting (formally proposing the relationship and accepting whatever motivations the source brings), handling (running the source over time, including communications, payment, and counter-surveillance), and termination. Sources may be recruited, may walk in unsolicited, or may be defectors who change sides and bring their access with them.

HUMINT operations are the form of intelligence collection most often structured to be deniable. Sources are typically run through case officers operating under non-official or official cover; the relationship between the source, the case officer, the station, and the headquarters element is layered specifically so that disclosure at one level does not necessarily compromise the others. Many of the dossiers on this site — the Cambridge Five, the Mitrokhin Archive, Wrath of God, Operation Ajax — turn on HUMINT relationships that were either run successfully for long periods or whose discovery substantially shaped a service's reputation.

See also

• SIGINT — the signals counterpart
• IMINT — the imagery counterpart
• MASINT — technical-signature collection
• OSINT — open-source counterpart, increasingly synthesised with HUMINT findings in published investigations
• GEOINT — geospatial intelligence
• Asset — the source side of a HUMINT relationship
• Defector — a particular kind of HUMINT source
• Plausible deniability — the doctrine that shapes how HUMINT is run