Abstract:

Generally encryption process is the overall processing image pixel so that it is weak to resist plaintext attack. In view of the problem of poor ability to prevent plaintext attack of pixel integral encryption, this article designs a chaotic single-pixel encryption algorithm of color image based on the discrete Hopfield network. This encryption method changes the pixel position of each component of image R,G,B by using one dimension chaotic sequence. Set each pixel bit weights and thresholds with the other two dimensional sequence in order to achieve effective encryption result. Theoretical analysis and experimental results show that the single pixel encryption algorithm can effectively resist differential attack. The feedback ciphertext can improve the pixel scrambling effect as well as good encryption effect and confidentiality of the encryption algorithm.

Key words: three-dimensional chaotic system, feedback neural network, image scrambling, encryption