Caesar Cipher
Caesar Cipher is an encryption algorithm originally made by Caesar. It's one of the simplest and widely used encryption algorithm.
It works by "shifting" the characters in a string with some 'key' value.
The key shifts the ASCII value of the characters so it gets decoded.
Playfair Cipher
Playfair Cipher is an encryption algorithm originally made by Charles Wheatstone. It's one of the first literal diagram subsitution cipher.
The technique encrypts pairs of letters, instead of single letters.
Hill Cipher
Playfair Cipher is an encryption algorithm originally made by Lester S. Hill. It's one of the first polygraphic subsitution cipher.
The technique works on the basis of linear algebra.
