Polyalphabetic

Some articles on polyalphabetic:

Polyalphabetic Cipher
... A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets ... The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case ... is more complex but still fundamentally a polyalphabetic substitution cipher ...
Substitution Cipher - Polyalphabetic Substitution
... Polyalphabetic substitution ciphers were first described in 1467 by Leone Battista Alberti in the form of disks ... In a polyalphabetic cipher, multiple cipher alphabets are used ... and of choosing which alphabet to use next, defines the particular polyalphabetic cipher ...
Polyalphabetic Cipher - History
... The Alberti cipher by Leon Battista Alberti around 1467 was believed to be the first polyalphabetic cipher ... device, his cipher disk, which implemented a polyalphabetic substitution with mixed alphabets ... Although Alberti is usually considered the father of polyalphabetic cipher, it has been claimed that polyalphabetic ciphers may have been developed by the Arab ...
Tabula Recta
... Trithemius used the tabula recta to define a polyalphabetic cipher which was equivalent to Leon Battista Alberti's cipher disk except that the alphabets are not mixed ... All polyalphabetic ciphers based on Caesar ciphers can be described in terms of the tabula recta ... One-time pad Permutation Pigpen Playfair Polyalphabetic Polybius Rail Fence Rasterschl√ľssel 44 Reihenschieber Reservehandverfahren ROT13 Running key Scytale Smithy code Solitaire Straddling checkerboard Substitution ...
History Of Cryptography - Medieval Cryptography
... Messages), in which he described the first cryptanalysis techniques, including some for polyalphabetic ciphers, cipher classification, Arabic phonetics and syntax, and, most importantly, gave the ... vulnerable to the cryptanalytic technique of frequency analysis until the development of the polyalphabetic cipher, and many remained so thereafter ... The polyalphabetic cipher was most clearly explained by Leon Battista Alberti around the year 1467, for which he was called the "father of Western cryptology" ...