The aim of this paper is to trace the development of cipher-writing from the very simple devices of the Ancients to the so-called Chiffre Indéchiffrable, generally called the Vigenère Cipher. The ...

In the Vigenere cipher, unlike in Ceasar cipher, the displacement involved for each character is different. The sequence of displacement is decided by a keyword, which is known to both the ...

Il metodo di Vigenere è il classico esempio di metodo di sostituzione polialfabetica. Fu inventato da Blaise de Vigénère nel 1586, anche se creò un codice ...