Running Key Cipher
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High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! In classical cryptography, the running key cipher is a type of polyalphabetic substitution cipher in which a text, typically from a book, is used to provide a very long keystream. Usually, the book to be used would be agreed ahead of time, while the passage to use would be chosen randomly for each message and secretly indicated somewhere in the message. Suppose we have agreed to use The C Programming Language (1978 edition) as our text, and we are using the ordinary tabula recta as our tableau. We need to send the message 'Flee at once'. First, we choose a starting point. Let us choose page 63, line 1: errors can occur in several places. A label has... We write out the running key under our plaintext: Plaintext: f l e e a t o n c e Running key: E R R O R S C A N O Ciphertext: J C V S R L Q N P S
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130350239
- Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
- Sprache Englisch
- Größe H220mm x B150mm x T5mm
- Jahr 2010
- EAN 9786130350239
- Format Kartonierter Einband
- ISBN 978-613-0-35023-9
- Titel Running Key Cipher
- Untertitel Cryptography, Polyalphabetic Cipher, Cipher, The C Programming Language, Tabula Recta, Vigenère Cipher, Exclusive or, One-Time Pad, Frequency Distribution, Almanac
- Gewicht 147g
- Herausgeber Betascript Publishers
- Anzahl Seiten 88
- Genre Informatik
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