Image Cryptography Based on Confusion and Diffusion Using 6D Hyper Chaotic System and Fibonacci Q-matrix
International journal of intelligent engineering and systems · 2024
The day-life calls for transferring millions of images between users, in the era of Information Technology.The security of these images essential using a well-known encryption techniques.The robust image cryptography relies on confusion and diffusion strategies.A new image cryptography algorithm is suggested multiple confusiondiffusion techniques based on 6D hyper chaotic system and Fibonacci Q-matrix.The plain image is confused employing random numbers produced using six-dimension hyper chaotic system across two different confusion phases.In diffusion phases, Fibonacci transformation, XOR operation and cyclic shift are applied.The security of the suggested algorithm is experimented via statistical attacks, differential attacks and brute force attacks.The proposed algorithm is succeeded in passing the security levels, where the key space was expanded to a relatively larger than 10 176 and having property of high key sensitivity.The resultant cipher image is free of statistical features by means of histogram and entropy since the histogram is completely equal in all instances even with monochrome colour images.The proposed technique accomplishes 7.99% of average entropy.Furthermore, it showed 99.61% and 31.21 of average NPCR and UACI, respectively.Moreover, the proposed technique records average correlation coefficient values in horizontal, vertical, and diagonal orientations equal to 0.0030, 0.0024, and 0.0026, respectively.