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Funkspiel (‹See Tfd›German: radio game) was a German term describing a technique of transmission of controlled information over a captured agent's radio so that the agent's parent service had no knowledge that the agent had turned and decided to work for the enemy.[1] It was a standard technique in radio counterintelligence and was used throughout the world.
- ^ Nigel West (31 August 2012). Historical Dictionary of Signals Intelligence. Scarecrow Press. p. 102. ISBN 978-0-8108-7187-8. Retrieved 26 May 2021.