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200 10$aFamous cryptographers /$fJeri Freedman
205   $aFirst edition.
210  1$aNew York :$cRosen Publishing,$d2017.
210  4$d?2017
215   $a1 online resource (64 pages) $ccolor illustrations, portraits
225 1 $aCryptography : code making and code breaking
311   $a1-5081-7312-5 
320   $aIncludes bibliographical references and index.
327   $aPolybius : Roman war correspondence -- Blaise de Vigene??re : the Vigene??re cipher -- Anson Stager : Civil War cryptography -- Agnes Meyer Driscoll, aka Madame X -- Elizabeth Friedman : gangsters and spies -- Alan Turing : solving Enigma -- Whitfield Diffie and Martin Hellman : public-key cryptography.
330   $aThis book tells the stories of individuals who have shaped cryptography. Readers will learn about Polybius and his cipher (the Polybius square), Julius Caesar and his secret military ciphers, diplomat Blaise de Vigen?ere and his polyalphabetic cipher, Anson Stager and Civil War cryptography, cryptanalyst Agnes Meyer Driscoll, codenamed Madame X, who decrypted radio codes for the US government, and more.
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