Encryption is a way to rewrite something in a code which can then be decoded later with the right key. The encryption we use employs a mathematical process for the key which is made up of a certain number of bits (hence, 128-bit encryption). The higher the number of bits, the better the encryption. While using our Online Banking System, all communication from you to the system and from the system to you is encrypted using a maximum of 128 bits. In other words, when you send information to the system, your browser encrypts it using a 128-bit key, then sends it to the system. The system then decodes the information you sent it using the key (which is predetermined when your Online Banking session is started) and processes it.