Includes bibliographical references (pages 985-987) and index.
One day of magic -- The first 3,000 years -- The rise of the west -- On the origin of a species -- The era of the black chambers -- The contribution of the Dilettantes -- Crises of the union -- The professor, the soldier, and the man on devil's island -- Room 40 -- A war of intercepts: I -- A war of intercepts: II -- Two Americans -- Secrecy for sale -- Duel in the ether: the axis -- Duel in the ether: neutrals and allies -- Censors, scramblers, and spies -- The scrutable orientals -- Russkaya Kriptologiya -- N.S.A. -- The anatomy of cryptology -- Heterogeneous impulses -- Rumrunners, businessmen, and makers of non-secret codes -- Ciphers in the past tense -- The pathology of cryptology -- Ancestral voices -- Messages from outer space -- Cryptology goes public.
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Kahn traces history of codes and ciphers from the dawn of civilization and details their influence on war, commerce, diplomacy, and espionage.