An exploration of codes and cryptography offers a discussion of concepts and terminologies and moves to a wide-ranging chronicle beginning with the ancient Polybius and concluding with a look at contemporary techniques and an examination of current privacy issues. 22,500 first printing.

� propos de l?auteur

Rudolf Kippenhahn is the award-winning author of One Hundred Billion Suns and the former director of the Max Planck Institute for Astrophysics inMunich. For ten years he was a professor of astronomy and astrophysics at the University of Goettingen. Ewald Osers (1917-2011) was an award-winning translator of Czech and German.

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