关键词： logistic混沌加密, 离散小波变换, 奇异值分解, 旋转攻击

Abstract: To enhance the ability of transform domain digital watermarking to resist rotation attacks,the article proposes a watermarking algorithm that fuses multiple domains to resist arbitrary rotation angle attacks.First,the host image is subjected to DWT transformation,then the low-frequency coefficients of the last level are subjected to SVD,and finally,based on the size of the watermark information an appropriate position in the singular value matrix is selected to embed the scrambled and encrypted watermark signal.The experimental results show that the algorithm has good watermark information hiding ability and can completely resist single rotation attacks ranging from 1°~360°.At the same time,it has strong robustness against combination attacks of image rotation attacks combined with cropping,JPEG compression and other attacks,and can effectively resist conventional signal processing.

Key words: logistic chaotic encryption, discrete wavelet transform, singular value decomposition, anti-rotation attack