Codes, Ciphers and Secret Writing

ISBN 13: 9780486247618

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Author Martin Gardner
Format Paperback
No. of Pages 96
Brand: Dover Publications

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Experiment with cryptography the science of secret writing. Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks...even invisible writing and sending messages through outer space. Hours of intrigue and challenge. 45 diagrams.

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Author: Gardner
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ISBN 13: 9780486247618

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