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Instead they use the Russian word dobrozhelatel, or "well-wisher," in this context essentially functioning as a synonym for "walk-in." This term has a positive connotation, and may reflect how the service views such people, as described by Ivan Serov , [ 13 ] former chief of GRU (Soviet military intelligence)
A person who commits espionage is called an espionage agent or spy. [1] Any individual or spy ring (a cooperating group of spies), in the service of a government, company, criminal organization, or independent operation, can commit espionage. The practice is clandestine, as it is by definition unwelcome.
The occult (from the Latin word occultus "clandestine, hidden, secret") is "knowledge of the hidden". [1] In common usage, occult refers to "knowledge of the paranormal", as opposed to "knowledge of the measurable", [2] usually referred to as science.
A fifth column is a group of people who undermine a larger group or nation from within, usually in favor of an enemy group or another nation. The activities of a fifth column can be overt or clandestine. Forces gathered in secret can mobilize openly to assist an external attack. The term is also applied to organized actions by military personnel.
A stowaway or clandestine traveller is a person who secretly boards a vehicle, such as a ship, an aircraft, a train, cargo truck or bus. [1] Sometimes, the purpose is to get from one place to another without paying for transportation. In other cases, the goal is to enter another country without first obtaining a travel visa or other permission.
While clandestine HUMINT sources can give the greatest insight into the adversary's thinking, they may also be most vulnerable to the adversary's attacks on one's own organization. Before trusting an enemy agent, remember that such people started out as being trusted by their own countries and may still be loyal to that country.
In espionage, a sleeper agent is one who has infiltrated the target country and has "gone to sleep", sometimes for many years. The agent makes no attempt to communicate with the sponsor or any existing agents or to obtain information beyond what is public, and becomes active only upon receiving a pre-arranged signal or message from the sponsor or a fellow agent.
A trade secret is a form of intellectual property (IP) comprising confidential information that is not generally known or readily ascertainable, derives economic value from its secrecy, and is protected by reasonable efforts to maintain its confidentiality.