The Codebreakers: The Story of Secret WritingWeidenfeld and Nicolson, 1967 - 1164 Seiten Kryptografiens udvikling igennem 3000 år. Fra Thebe, Irak, til huguenotterne ogVestens første kryptolog Leo Battista Alberti. |
Im Buch
Ergebnisse 1-3 von 82
Seite 129
... substitution . In homophonic substitution , plaintext E might be represented by 89 , 43 , 57 , and 64 - but those four numbers would always and invariably refer to the same plaintext , whereas in polyalphabetic substitution cipher ...
... substitution . In homophonic substitution , plaintext E might be represented by 89 , 43 , 57 , and 64 - but those four numbers would always and invariably refer to the same plaintext , whereas in polyalphabetic substitution cipher ...
Seite 404
... substitution such as the Playfair is stronger than a monographic substitution . The reason is that digraphs are harder to identify than single letters - partly because there are more to choose from , partly because their characteristics ...
... substitution such as the Playfair is stronger than a monographic substitution . The reason is that digraphs are harder to identify than single letters - partly because there are more to choose from , partly because their characteristics ...
Seite 1157
... substitution as a field cipher , 191 , 628 contrasted with use of homophones and polyphones , 125 , 129 definition ... substitution Polybius , 83 , 86 , 203 Polygrams , definition , xiv Polygraphia libri sex , 133-36 Polygraphic ...
... substitution as a field cipher , 191 , 628 contrasted with use of homophones and polyphones , 125 , 129 definition ... substitution Polybius , 83 , 86 , 203 Polygrams , definition , xiv Polygraphia libri sex , 133-36 Polygraphic ...
Inhalt
One Day of MAGIC | 1 |
THE PAGEANT OF CRYPTOLOGY | 69 |
The First 3000 Years | 71 |
Urheberrecht | |
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Häufige Begriffe und Wortgruppen
Abwehr agency agents Allied ambassador American appeared Army attack B-Dienst Bazeries became began Black Chamber British cable called chief cipher alphabet cipher disk cipher machine cipher systems ciphertext ciphertext letter codebooks codebreakers codegroups codewords columns command communications copies cryptanalysts crypto cryptogram cryptography cryptology decipher decipherment decode Department digits diplomatic dispatches embassy enciphered encipherment encoded enemy English forces Foreign Office French frequency Friedman German Gold-Bug headquarters hieroglyphics intelligence intercept Italian Japan Japanese Kerckhoffs language later Lieutenant mathematics messages military monalphabetic naval Navy never nomenclator one-time pad operation Parker Hitt Pearl Harbor plaintext letter polyalphabetic polyalphabetic substitution President probably radio reported Room 40 rotor Russian secrecy secret Secretary sent ships Signal solution solved Soviet staff station substitution superencipherment telegram telegraph telephone tion traffic transposition U-boat United Vigenère Washington words writing wrote Yardley Zimmermann telegram