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Mask: MI5's Penetration of the Communist Party of Great Britain

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MASK is the codename for one of the most sensitive, long-term sources ever run by any British intelligence organisation. It concealed the existence of a radio interception programme operated by the Government Code and Cipher School (GC&CS) which succeeded in monitoring, and reading, large quantities of encrypted wireless traffic exchanged between ... Read More

Mask: MI5's Penetration of the Communist Party of Great Britain 2012, Routledge, London

ISBN-13: 9780415649926

Paperback

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Mask: Mi5's Penetration of the Communist Party of Great Britain 2005, Routledge, London, England

ISBN-13: 9780415351454

Hardcover

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