English language
Published May 9, 2013 by Dover Publications, Incorporated.
Codes, Ciphers and Secret Writing
Martin Gardner: Codes, Ciphers and Secret Writing (2013, Dover Publications, Incorporated)
- ISBN:
- 978-0-486-32031-1
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Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink.