Codes ciphers & secret writing Experiment with cryptography — the science of secret writing. Cipher and...
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Codes ciphers & secret writing Description

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. Tags: codes and secret writing, secret writing, how to use the secret, how to use code cipher, cipher code.

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