Product Information
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: * 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 * Development of code-breaking devices such as the Enigma machine.Product Identifiers
PublisherHarperCollins The Limited
ISBN-10000722804x
ISBN-139780007228041
eBay Product ID (ePID)90471324
Product Key Features
Number of Pages192 Pages
LanguageEnglish
Publication NameCodes and Ciphers
SubjectCommunication Studies, Military / General, General, Puzzles
Publication Year2006
TypeNot Available
AuthorNot Available
Subject AreaGames & Activities, Référence, Language Arts & Disciplines, History
SeriesCollins Gem Ser.
FormatTrade Paperback
Dimensions
Item Height0.5 in
Item Weight4 oz.
Item Length4.6 in
Item Width3.3 in