Agent/Asset - Person who is recruited by a case officer to obtain intelligence
Blown/Burnt - Spy who has been exposed
Brush Pass - Momentary person-to-person contact to pass intelligence
Bug - Covert listening or recording device
Case Officer - Staff officer of an intelligence agency, handles agents
COS - Chief of a CIA station posted to an embassy
DST - Direction de la Surveillance du Territoire, the French National Police who conduct counterespionage and counterintelligence. Equivalent to FBI.
Dry Clean - To evade surveillance by hostile intelligence service
Extraordinary Rendition - Kidnapping of spies or terrorists for interrogation
Legat - Legal Attaché, FBI agent attached to a US embassy
Legend - Life story created for a covert officer or agent
Mossad - Israel’s spy agency
MI5 - British Secret Intelligence Service (Internal)
MI6 - British Secret Intelligence Service (External)
NOC - Non-official cover. CIA equivalent of Russian deep cover spy. They have no diplomatic immunity.
Parole - Password used to confirm identity between agents
Safehouse - Place where spies can hide from hostile security services
Sleeper - Deep cover officer/agent
Target - Person, place, or thing of intelligence interest
Tradecraft - Mechanics of/proficiency in espionage