Research On Database Watermarking Based On Image And Chaotic Map

The database watermarking technique is an effective implement for the copyright protection of database. It embeds some identified information as watermark into original database imperceptibly, and verifies the property and integrity from detecting or abstracting watermark. It provides solutions to copyright protection and content verification. The key of database watermarking technique is how to choose work fields and embed strategy, which determines the performance of the whole watermarking system. On the basis of present database watermarking algorithm, a new database watermarking technology based on image and chaotic map is proposed in the paper.The main contribution of this paper is as follows:Firstly, on the basis of studying existing database watermarking technology, we discussed the superiority of database watermarking technology that based on image and chaotic map.Secondly, there are some defects of traditional algorithms, such as the redundancy of vector database is inadequate, the capacity of embedding watermark information is limited and cannot effective resistance the attack of property order change. In order to solve the above problem this paper has improved labeling method, using the method that tuple tags combined with property tags. At the same time, using the method that chaotic sequences and tags combined with the system parameters to select the position of watermark embedding, it can effective guarantee the security of watermark information.Thirdly, applied the algorithm of this paper to multiple databases watermarking technology, against the characteristics of the database to be updated frequently, this method can significantly improve the robustness and security of database watermarking.Finally, we give simulated experiments of these algorithms. It verifies the effectiveness of the algorithm.