IMAGE ENCRYPTION FOR SECURE DATA TRANSMISSION BY APPLYING BIT-PLANE MATRIX ROTATION

Abstract

In this study, we are proposing a new algorithm for image encryption based on bit-plane matrix rotation and two hyper chaotic systems. First, the algorithm decomposes the plain image into eight-bit planes and builds a matrix of three dimensions (3D). The sub-matrix of the 3D bit-plane matrix is then rotated in various directions regulated by a hyper-chaotic system-generated PRNS. Finally, by using another main stream, the pixel values of the intermediate image are changed. In addition, the MD5 hash function of the plain-image, which improves the connection between the encryption method and the plain-image, provides the initial diffusion values and parameters relevant to generating chaotic sequences. In terms of key space, histogram, information entropy, key sensitivity and adjacent pixel correlation index, simulation experiments are presented to analyze the image encryption scheme. Theoretical research and experimental results show that the algorithm proposed has outstanding performance and a sufficient level of protection.