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Make this collection of seven ingenious paper gadgets which introduce and explain many of the concepts used in cipher machines. Decode the secret messages and then start to understand how cryptographers try to protect information from prying eyes. See also how cryptanalysts set about breaking such codes and ciphers. A substantial minibook explains the principles of codebreaking, and includes the story of the Enigma machine and Bletchley Park

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ISBN	1899618538
ISBN 13	9781899618538
Publication Date	1999
Publisher	Tarquin
Pages	32
Format	Paperback
Authors	Gerald Jenkins,Magadalene Bear,
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