The Optimal Scrambling Algorithm Based on Zigzag and Affine Transformation
Hui Wang, Yukun Hu, Lijun Yu, Qiang Wang · 2018
With the rapid development of information technology, increase attention has been given to network security. Digital watermarking technology has been widely used in the in the protection of formation copyright. As an important method to preprocess and encrypt images in digital watermarking technology, image scrambling is attracting more and more attention of scholars. In this paper a new method combined with zigzag transform affine transformation is proposed. And four algorithms are proposed during the process according to the different order and the different way it circulates. Through the results of a series of simulation experiments and the considerations of practical applications, the optimal scrambling algorithm combining zigzag and affine transformation is produced finally. The algorithm overcomes the drawback of traditional fixed algorithm algorithm easy to crack. It also has the advantages of low time complexity and it easy to realize. This algorithm has a good scrambling effect and is hard to crack.