Image encryption method based on memristor chaos and block Josephus scrambling

The invention relates to the technical field of chaotic image encryption, in particular to an image encryption method based on memristor chaos and block Josephus scrambling. According to the application, a plaintext image is converted into a pixel matrix, then four groups of pseudo-random integer sequences are generated through a memristor chaotic system, values of two groups are combined with an improved Josephus scrambling algorithm, row and column scrambling is carried out on the pixel matrix to obtain a first scrambling matrix, then the first scrambling matrix is divided into blocks, and the first scrambling matrix and the second scrambling matrix are combined to obtain a second scrambling matrix; and combining the other group of pseudo-random integer sequences with a Josephus scrambling algorithm to scramble each sub-block to obtain a second scrambling matrix, and finally performing pixel diffusion on the second scrambling matrix by using the remaining group of pseudo-random integer sequences and convert