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Codes, Ciphers and Secret Writing
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Experiment with cryptography? 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.
Computer eBook Details
- ISBN-10: 0486247619
- ISBN-13: 9780486247618
- Publisher: Dover Publications
- Pages: 96
- Date: October 1984
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Top Secret: A Handbook of Codes, Ciphers and Secret Writing (Paperback) http://t.co/kJb2P7E7