Image encryption algorithm using multi-base diffusion and a new four-dimensional chaotic system

Information security is very important in the era of rapid development of science and technology. People often use multimedia to communicate in their daily life. Image plays an important role in multimedia communication, so it is urgent to protect image information. In order to improve the security of images in transmission, an image encryption algorithm using multi-base diffusion and a new four-dimensional chaotic system is designed in this paper. The algorithm decomposes each pixel value into multi-based. After decomposition, the coefficient matrix and base matrix are scrambled by FYTS using the sequence generated by the new four-dimensional chaotic system, and finally recombined to perform pixel-level and bit-level scrambling respectively. After simulation with MATLAB, it is obvious that the final encrypted image does not have the contour of the original image, which meets the requirements of encryption. Through histogram, entropy analysis, anti-differential attack analysis and other experimental results, it is proved that the proposed algorithm has high security.