Lightweight Image Encryption: Cellular Automata and the Lorenz System

The ever-increasing transmissions of multimedia over the Internet is requiring more advanced security schemes. This paper proposes a lightweight image encryption scheme that is based on 2 stages. The first stage incorporates the use of Rule 30 cellular automaton, while the second stage incorporates the use of a Lorenz system. Performance of the proposed encryption scheme is evaluated using a number of metrics. The computed values of the metrics indicate a comparable performance to counterpart schemes from the literature, at a very low cost of processing time. Such a trait indicates that the proposed image encryption scheme possesses potential for real-time image security applications.