19 relations: Blackmail, Clandestine cell system, Clandestine operation, Coercion, Communication, Concealment device, Countersurveillance, Credential, Cryptography, Cut-out (espionage), Dead drop, Human intelligence (intelligence gathering), Intelligence agency, Intelligence officer, Interrogation, Motives for spying, One-time pad, Surveillance, Tradecraft.
Blackmail is an act, often criminal, involving unjustified threats to make a gain—most commonly money or property—or cause loss to another unless a demand is met.
A clandestine cell system is a method for organizing a group of people such as resistance fighters, sleeper agents, or terrorists so that such people can more effectively resist penetration by an opposing organization (such as law enforcement).
A clandestine operation is an intelligence or military operation carried out in such a way that the operation goes unnoticed by the general population or specific enemy forces.
Coercion is the practice of forcing another party to act in an involuntary manner by use of threats or force.
Communication (from Latin commūnicāre, meaning "to share") is the act of conveying intended meanings from one entity or group to another through the use of mutually understood signs and semiotic rules.
Concealment devices or diversion safes are used to hide things for the purpose of secrecy or security.
Countersurveillance refers to measures undertaken to prevent surveillance, including covert surveillance.
Examples of credentials include academic diplomas, academic degrees, certifications, security clearances, identification documents, badges, passwords, user names, keys, powers of attorney, and so on.
Cryptography or cryptology (from κρυπτός|translit.
In espionage parlance, a cut-out is a mutually trusted intermediary, method or channel of communication that facilitates the exchange of information between agents.
A dead drop or dead letter box is a method of espionage tradecraft used to pass items or information between two individuals (e.g., a case officer and an agent, or two agents) using a secret location, thus not requiring them to meet directly and thereby maintaining operational security.
Human intelligence (frequently abbreviated HUMINT and sometimes pronounced as hyoo-mint) is intelligence gathered by means of interpersonal contact, as opposed to the more technical intelligence gathering disciplines such as signals intelligence (SIGINT), imagery intelligence (IMINT) and measurement and signature intelligence (MASINT).
An intelligence agency is a government agency responsible for the collection, analysis, and exploitation of information in support of law enforcement, national security, military, and foreign policy objectives.
An Intelligence Officer is a person employed by an organization to collect, compile and/or analyze information (known as intelligence) which is of use to that organization.
Interrogation (also called questioning) is interviewing as commonly employed by law enforcement officers, military personnel, and intelligence agencies with the goal of eliciting useful information.
There are many suggested motives for spying that an individual may have.
In cryptography, the one-time pad (OTP) is an encryption technique that cannot be cracked, but requires the use of a one-time pre-shared key the same size as, or longer than, the message being sent.
Surveillance is the monitoring of behavior, activities, or other changing information for the purpose of influencing, managing, directing, or protecting people.
Tradecraft, within the intelligence community, refers to the techniques, methods and technologies used in modern espionage (spying) and generally, as part of the activity of intelligence.