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Книга ISBN13 9785513619642 - Classical cipher (Jesse Russel) в магазинах, библиотеках и электронных библиотеках с он-лайн чтением

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Название: Classical cipher
High Quality Content by WIKIPEDIA articles! A cipher is a means of concealing a message, where letters of the message are substituted or transposed for other letters, letter pairs, and sometimes for many letters. In cryptography, a classical cipher is a type of cipher that was used historically but now has fallen, for the most part, into disuse. In general, classical ciphers operate on an alphabet of letters (such as "A-Z"), and are implemented by hand or with simple mechanical devices. They are probably the most basic types of ciphers, which made them not very reliable, especially after new technology was developed. Modern schemes use computers or other digital technology, and operate on bits and bytes. Many classical ciphers were used by well-respected people, such as Julius Caesar and Napoleon, who created their own ciphers which were then popularly used. Many ciphers had their origins in the military and were used for transporting secret messages among people on the same side....
Авторы: Jesse Russel
Издательство: Книга по Требованию
Год: 2012
Местонахождение: OZON.ru
ISBN: 978-5-5136-1964-2


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