An improved s-box based algorithm for efficient image encryption

Image encryption needs to be secure by resisting statistical attacks and other types of attacks. In this paper, we propose an algorithm, which applies nonlinear s-box byte substitution. Then, it performs a shuffling operation partially dependent on the input data and uses the given key. The proposed algorithm was implemented and tested with different data, mainly consisting of images. Results confirmed its security, shown through statistical analysis using histograms, correlation and covariance. It can be stated that the algorithm was suitable for encrypting images and other types of data.