Cryptography with C2

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Post » Thu Jun 22, 2017 5:49 pm

I made a small cryptography system.
* math explanation: it uses substitution cipher with a function of the form f(x)=ax+b and integer congruences module 31.

if you wanna play with it, just type your text (there is restriction on the characters/letters used), choose the example values of a and b, that is on the description of the "game", and send cipher messages to your friends (but you should tell them how to decipher it :lol: ).

try to decipher this message below (it was ciphered with a=23 and b=7):
WT!V_HKCMHKFT!SIBTCQH_GXKNGP.GSKI

here is the link to play with cryptography:
https://www.scirra.com/arcade/tutorial- ... aphy-19076
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