Codes, Ciphers and Secret Writing

Codes, Ciphers and Secret Writing

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qA fascinating, challenging book.q a€” A. L. A. Booklist. Experiment with cryptography a€” 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.If intelligent beings are there, perhaps they have been trying for centuries to communicate with other planets by radio code. In 1960 one of our large radio telescopes, at Green Bank, West Virginia, began scanning the sky for such messages.


Title:Codes, Ciphers and Secret Writing
Author: Martin Gardner
Publisher:Courier Corporation - 2013-04-10
ISBN-13:

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