An enhanced modulo-based image encryption using chaotic and fractal keys

In this paper, we propose an enhanced version of modulo-based image encryption suggested by Rozouvan. Rozouvan et al. employed a fractal image to generate strong keys for image pixels encryption. The proposed enhanced version conflates the merits of chaos theory along with the use of fractal keys thereby inherit the features of original algorithm. The security enhancements are proposed to provide better robustness and security to realize trustworthy image encryption. To achieve the purpose, chaotic map is incorporated to create image information dependency so as to thwart the attacks launched by Yoon et al. on Rozouzan algorithm. Arnold cat map is used to perform pixels shuffling before pixels encryption to complicate the attack complexity. The simulation results on standard analyses demonstrate its effectiveness in providing better security and robustness to digital media.