In this program we had use 3 method of cryptography 1- Shift Cipher: By using alphabet and add a key value to replace the alphabet we can generate this technique. 2- Affine Cipher: is a generalization of the shift cipher where each letter in an alphabet is mapped to its numerical values. 3- One Time Pad: powerful encryption that cannot be break if it used in a correct way. Use random private key to do this technique using modular addition.