/image%2F1246156%2F20180407%2Fob_8287bf_blinker.png)
In Spartans, Scytale or also knows as Plutarsh’s Staff ; was a wooden stick used to read or write an encrypted message. It dates back to the 5th century BC and is considered to be one of the oldest transposition ciphers used. The Spartans used it during...
Lire la suite
The greeks are at the origin of the square of Polybe. Polybe was a greek writer, he was at the origin of the first method of substitution cipher. The square of Polybe is a system based on a square of 25 squares. Each letter is represented by 2 figures....
Lire la suite
I. Qu’est-ce que le chiffre de césar Le chiffre de césar est une technique de chiffrement assez simple. Cependant cette simplicité ne rend pas chiffrement très sûr, en effet il n’y a que 26 façons de crypter un message. Il est donc facile de tester toutes...
Lire la suite
