C3I - command, control, communications and intelligence - Command and control refers to the ability of the military commander to direct his forces. The addition of Communications to the grouping reflects the fact that communications is required to enable this coordination. In modern warfare, computers are also a key component. Intelligence is the knowledge relevant to the coordination of forces. Surveillance, Target Acquisition and Reconnaissance are methods of obtaining this intelligence. These terms can be used to refer to infrastructure, a role of military units or individuals, or procedures employed.
CANARY TRAP - A canary trap is a method for exposing an information leak, that involves giving different versions of sensitive information to each of a group of suspects and seeing which version gets leaked.
CENTER - Moscow headquarters of the KGB
CHICKEN FEED - mineal information offered to a double agent, used to establish him as someone with access to intelligence
CHRISTIANS in Action - slang for the CIA
CLANDESTINE operation - actions that are meant to be undetected
COBBLER - specialist who forges passports
COMPARTMENTALIZATION of information means to limit access to information to persons who directly need to know certain such information in order to perform certain tasks. The idea is that the fewer people know, the better, because as the number of people "in the know" grows, so does the risk or likelihood that such information could be compromised or fall into the hands of the opposition. As such, there tend to be varying levels of clearance within organizations. However, even if someone has the highest clearance, certain "eyes only" information may still be restricted to certain operators, even of lower rank. In intelligence administration, it is particularly useful to keep close watch on "sources and methods" information, so as to prevent disclosure of people and their activities, whose lives may be at risk, if such information were publicly disclosed, or, once again, fall into the hands of the opposition.
CONSUMER - person or an organization on the receiving end of intelligence obtained by spies
COOKED Intelligence - distorted intelligence passed on to a double agent, containing some truth
COUNTER-ESPIONAGE - spying directed against an enemy's spy system, such as by recruiting agents in foreign intelligence organs
COUNTER-INTELLIGENCE - the activity of preventing the enemy from obtaining secret information.
COUSINS - slang for CIA operatives
COVERT operation - those actions for which the government will deny knowledge or responsibility
CRYPTONYMS and CODEWORDS used by the CIA
CSE - Communications Security Establishment (UKUSA Alliance member - Canada)
CSIS - Canadian Security and Intelligence Service - Canada's spy agency
CT - CounterTerrorism
CUT-OUT In espionage, a cut-out is a courier or mechanism used to pass information and devices from one spy to another while operating in a "denied area" or a hostile environment. The two forms of cut-outs are the block and chain. A block cut-out is an agent familiar with the entire spy network or cell and those who are in it, while the chain cutout is simply an agent who is aware of only the person providing the information and the spy who is receiving the information. The chain cut-out helps to maintain the compartmentalization of the spy network, which increases security by maintaining everyone's anonymity. The term cut-out may also be used more generally to describe a person or agency used as a pawn by intelligence agencies. (see also LETTERBOX)
DANGLE - a dangle is spy posing as an informant who supplies deliberately misleading information
DEAD DROP - pre-arranged location for dropping off secrets / receiving instructions and money
DECOY - person used to distract, confuse the adversary
DEFENSE MESSAGING SYSTEM (DMS) - secure electronic mail system used within the defense community
DEFCON - Defense Condition
DEFECTOR - In politics, a defector is a person who gives up allegiance to one state or political entity in exchange for allegiance to another. This act is usually in a manner which violates the laws of the nation or political entity from which the person is seeking to depart, as opposed to a change of citizenship, which does not typically defy the law of any nation.
During the Cold War, the many people escaping from the Soviet Union or Eastern Bloc to the West were called defectors.
DGSE - General Directorate for External Security - The Direction Générale de la Sécurité Extérieure (DGSE) or General Directorate for External Security is France's external intelligence agency. On April 2, 1982 it replaced the Service de Documentation Extérieure et de Contre-Espionnage (SDECE). Its motto is Partout où nécessité fait loi ("In every place where necessity makes law").
DST - Domestic Security - The Direction de la Surveillance du Territoire (DST; Directorate of Territorial Surveillance) is a directorate of the French National Police operating as a domestic intelligence agency. Its attributions include counterespionage, counterterrorism and more generally the security of France against foreign threats and interference, including economic. It was created in 1944 with its headquarters situated at 7 rue Nélaton in Paris.
DIPSEC - Diplomatic Security
DISINFORMATION - deliberately false information released to mislead an enemy
DOUBLESPEAK - language used to disguise actual meaning, used by military and government agencies (for example: 'physical persuasion' instead of torture, 'neutralize' instead of kill, 'preemptive war' instead of illegal invasion, 'terrorist' instead of freedom fighter, etc.)
DRY CLEAN - to dry clean means to evade surveillance
DSD - Defence Signals Directorate (UKUSA Alliance member - Australia)