Three dimensional image encryption algorithm based on quantum random walk and multidimensional chaos

With the development of computer network technology, people’s requirements for information security is increasing day by day. However, classical encryption technology has defects small key space and easy crack. The problems image in protecting private content need solving urgently. As a new type quantum generator, random walk large space. Compared with walk, computing speed are significantly improved. This paper presents three-dimensional algorithm that based on involves Lorenz Rossler multidimensional chaos. Firstly, Gaussian pyramid used to segment image. Secondly, Hamming distances several sub images calculated using sequence generated chaotic system multi-dimensional chaos, then synthesized, Euclidean between three RGB channels calculated. Finally, value obtained from remainder distance distance, as an initial input into chaos generate which XOR channel so create encrypted corresponding decryption scheme inverse process process. In addition, terms transmission security, this uses blind watermark embedding DCT SVD embed image, receiver can extract judge whether damaged attack according integrity information. If it not attacked maliciously, will be decrypted. operation further improves protection security.The experimental results show peak signal-to-noise ratio stable 7 9 effect good, GVD score close 1, correlation uniformly distributed, coefficient 0, 2<sup>128</sup> size histogram evenly showing high ability resist statistical analysis attacks.