Encrypt given data using aes192 cipher algo. AES with 192-bit key, a middle-ground between AES-128 and AES-256. Defined in the AES standard as an option alongside AES-128 and AES-256. Secure but not widely used compared to AES-128 and AES-256. Our encryption process prepends the IV string used during the encryption process in the encrypted data so that it can be used during decryption.