基于摩斯密码和元胞自动机的图像加密算法

In order to solve the problem of insufficient key space and lack of sensitivity to the plain image that led to easy vulnerability to attacks and low robustness of existing image encryption algorithms. A novel image encryption algorithm was designed by combining Morse code and cellular automata (CA). The algorithm obtained the initial key value that was highly associated with the plain image with the help of hash function and Morse code and employed the encryption structure of permutation-diffusion-CA conversion instead of the traditional permutation-diffusion encryption mechanism. The analysis of experimental results and related secure indicators showed that the key of the algorithm was highly correlated with the plain image, the key space reached 2528, and it could resist various statistical attack and differential attack, 60% shear attack and various noise attack, indicating that the algorithm displayed a high sensitivity, good security and robustness.