Blackwood's Magazine, Volume 315William Blackwood, 1974 - England |
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Page 257
... ciphers , it was left to the Arabs to conceive cryptanalysis , the study of hidden writing ; indeed , the word cipher ' is derived from an Arabic word meaning ' zero ' . Essentially ciphers are based on the alphabet . Thus , even a ...
... ciphers , it was left to the Arabs to conceive cryptanalysis , the study of hidden writing ; indeed , the word cipher ' is derived from an Arabic word meaning ' zero ' . Essentially ciphers are based on the alphabet . Thus , even a ...
Page 259
... cipher : transposition and substitu- tion . In the former the arrangement of the letters is altered ; thus an anagram is a transposition cipher . In substitution ciphers , which enjoy greater security , different letters are chosen ...
... cipher : transposition and substitu- tion . In the former the arrangement of the letters is altered ; thus an anagram is a transposition cipher . In substitution ciphers , which enjoy greater security , different letters are chosen ...
Page 261
... Cipher . In fact it was a mixture of cipher and code , involving numerals . It was not broken till 1891 when Etienne Bazeries , another brilliant French cryptographer , ac- complished the task . It is sometimes assumed that the French ...
... Cipher . In fact it was a mixture of cipher and code , involving numerals . It was not broken till 1891 when Etienne Bazeries , another brilliant French cryptographer , ac- complished the task . It is sometimes assumed that the French ...
Contents
SECRET DENUNCIATIONS BY LESLIE GARDINER | 186 |
A BRUSH WITH SHOWBIZ BY R HUDSON SMITH | 214 |
SNAKES AND SNIPERS | 256 |
Copyright | |
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