Loads of Codes and Secret Ciphers
Books / Hardcover
ISBN: 0027478106 / Publisher: Simon & Schuster Children's Publishing, October 1984
Discusses and provides practice in making and breaking codes and ciphers, as well as in building simple coding devices to transmit secret messages.
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Traces the history of codes and gives step-by-step instructions for encoding and decoding, enciphering and deciphering, varying standard code systems, and construct useful coding devices
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