The code book - Simon Singh PDF free download

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The Code Book - Simon Singh - PDF free download - How to make it, break it, hack it, crack it.
For centuries, kings, queens and generals have relied on efficient communication. In order to govern their countries and command their armies. At the same time, they have all been aware of the consequences of their messages falling into the wrong hands. Revealing precious secrets to rival nations and betraying vital information to opposing forces. It was the threat of enemy interception that motivated the development of codes and ciphers.
The code book - Simon Singh PDF free download Techniques for disguising a message so that only the intended recipient can read it. The desire for secrecy has meant that nations have operated codemaking departments, which were responsible for ensuring the security of communications by inventing and implementing the best possible codes. At the same time, enemy codebreakers have attempted to break these codes and steal secrets. Codebreakers are linguistic alchemists, a mystical tribe attempting to conjure sensible words out of meaningless symbols. The history of codes and ciphers is the story of the centuries-old battle between codemakers and codebreakers. This is an intellectual arms race that has had a dramatic impact on the course of history.