IES: Hyper-chaotic plain image encryption scheme using improved shuffled confusion-diffusion

Abstract Achieving a secured encrypted image is challenging in sensitive data communications. An accurate and secure encryption scheme for colour images requires the generation of intricate secret keys. To attain this goal, we proposed an improved shuffled confusion-diffusion based colour Image Encryption Scheme (IES) using hyper-chaotic plain images. First, five different sequences of random numbers were generated. Two of these sequences were used to mix image pixels and bits, while the remaining three were used to XOR the values of image pixels. The performance of the developed IES was evaluated in terms of various measures such as key space size, correlation coefficient, entropy, mean squared deviation (MSD), Peak Signal-to-Noise Ratio (PSNR) and differential analysis. The values of the correlation coefficient (0.000732), entropy (7.9997), PSNR (7.61), and MSE (11,258) were determined to be better compared to with the art of technologies that exist. The proposed IES outperformed the other methods in terms of computational efficiency and other performance metrics when compared. The proposed may be beneficial for encrypting big data sets on parallel machines.