Espionage

Espionage is the name for the practice of spying on others (usually nation states) to gain information for economic, political or military advantage. Most countries routinely spy on their potential enemies, and also their allies, although they generally deny this.

The cold war involved intense espionage activity between the United States and its allies and the Soviet Union and its allies, particulary related to nuclear weapons secrets.

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Spies:

• Kim Philby

Espionage organizations: see Intelligence agencies

Espionage technology:

• Cryptography

• Echelon

• SIGINT

• Ultra

• U-2

Fictional spies:

• James Bond

See also:

• Spy fiction