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A tour through history's real codes and ciphers written by two of today's best cipher crackers. Expert codebreakers Elonka Dunin and Klaus Schmeh introduce you to the world of breaking encrypted texts, whether by hand or using the many free computer tools available today. Each chapter introduces you to a specific cryptographic technique and presents many real-life examples of text encrypted using that scheme, from modern postcards to nineteenth-century newspaper ads, war-time telegrams, notes smuggled into prisons, and even entire encrypted books. You'll learn how to:EXTRA 10 % discount with code: EXTRA
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