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Collins Gem Codes & Ciphers: Making Them and Breaking Them

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Collins Gem Codes & Ciphers: Making Them and Breaking Them image
ISBN-10:

000722804X

ISBN-13:

9780007228041

Author(s): Collins UK
Released: Aug 07, 2006
Publisher: HarperCollins, UK
Format: Paperback, 192 pages
Related ISBN: 9780007228034
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Description:

This title provides all you need to know about making and breaking codes. "Gem Codes and Ciphers" touches on everything from the smoke signals used by Native American Indians to encryption devices used by government agencies and the military. Not only does this handy, pocket-sized book cover the history of the development of codes and ciphers, it also has practical information and advice on how to make codes and, more importantly, how to break them! Topics covered are: Native American smoke signals, Masonic signals, flags, and semaphore; morse code, Braille, ASCII computer language; letter substitution - mono- and poly-alphabetic; computer algorithms; codes and ciphers throughout history; and development of code-breaking devices, such as the Enigma machine.

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The Collins Gem Codes & Ciphers: Making Them and Breaking Them book is in very low demand now as the rank for the book is 5,493,079 at the moment. A rank of 1,000,000 means the last copy sold approximately a month ago.

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