《Codes, Ciphers and Secret Writing》

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Codes, Ciphers and Secret Writingtxt，chm，pdf，epub，mobi下载
作者: Martin Gardner
出版社: Dover Publications
出版年: 1984-10-01
页数: 96
定价: GBP 5.99
装帧: Paperback
ISBN: 9780486247618

内容简介 · · · · · ·

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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