Chaotic Image Encryption Algorithm Based on Discrete Hopfield Network

For most of chaotic image encryption algorithms,pixel overall treatment method(such as XOR operation) is used in the image pixel value scrambling.It was very weak to resist known cleartext attack.So a high dimension chaotic encryption based on discrete Hopfield network is proposed in this paper.Image pixel value scrambling is realized through dynamic adjustment of each bit's scrambling weight and threshold depending on any two dimensions of Rssler 3D chaotic sequences.Image pixel position scrambling is realized depending on the third dimension of Rssler 3D chaotic sequences.Each pixel value scrambling is a composite treatment,it increases decryption difficulty.Experimental results show that the algorithm has strong ability to resist attacks,and is a security image encryption algorithm.