Substitution Cipher The Substitution Cipher is a Cryptographic technique used for the encryption of a message The encryption is done based on a key agreed upon by the sender and receiver of the message The letter is encoded/mapped to a different letter/character Working The user is prompted to enter the message as well as the key according to which the message will be encrypted The key will be accepted as a CSV file Considering an example : This is the key as agreed upon both the parties On running the script, the user is prompted to enter a message
