A Fast and Effective Image Encryption Scheme Based on DSVSM and (7, 4) Hamming Code

In this work, a fast and effective chaos-based image cryptosystem is proposed. Collaborated with a dynamical state variables selection mechanism (DSVSM) and (7, 4) Hamming code, discrete fractional-order system with high computation complexity is innovatively introduced in this paper. In our scheme, the chaotic system only needs to be pre-iterated once and different combinations of state variables produced by DSVSM are used to encrypt different images. What’s more, these combinations of state variables are extremely sensitive to pixel changes and can introduce differential pixels into the confusion and diffusion process. Therefore, with the help of the proposed pixel-selecting-exchanging based confusion strategy, an excellent differential spreading effect can be generated to accelerate our block diffusion efficiency. Finally, in order to further advance the performance of the proposed cryptosystem, the transmission of state variables will be hidden in the corresponding cipher image through (7, 4) Hamming coding. Simulation results and performance analysis substantiate that the proposed cryptosystem has superior security, high efficiency and more in line with the real-time secure image communication.