A Color Image Encryption Algorithm Using the Fractional-order Hyperchaotic Systems

Abstract

This paper presents a new color image encryption algorithm based on the fractional-order hyper chaotic systems. First, two fractional-order hyper chaotic systems is applied to generate the chaotic sequences to scramble and diffuse the images. The system parameters, fractional order and initial conditions can be used as the secret keys. Second, we modify the RGB values of the plain-image pixels using six encryption matrices generating from two fractional-order hyper chaotic systems with a XOR operation two times. Third, the image pixel-position is further scrambled by a permutation matrix generating from a fractional-order hyper chaotic system. Finally, experimental results show the efficiency and high security of the proposed algorithm.