Research On Multilevel And Multi-frame Digital Watermarking Protocol Based On Second-hand Market

Digital watermarking is one of the hot issues in the field of information security.With the rapid development of multimedia technology and network technology,the protection of multimedia contents such as image,audio,video and software has become one of the urgent problems to be solved.In digital watermarking theory,watermarking algorithm and protocol are the hot and effective methods to study digital watermarking technology,which can also protect digital media content security.This paper focuses on the watermarking protocol of the secondary market based on iris recognition technology,which is developed on the basis of the watermarking algorithm.A new video watermarking algorithm based on DCT and DWT transform is proposed.Combining the transformation characteristics of traditional DCT and DWT transform,the hybrid algorithm is created using the sub-blocks with large information quantity and the specific matrix transformation method.The robustness and invisibility of the watermark signal are enhanced by the strong robustness of the DC coefficients and LL subset.The simulation results show that the DCT-DWT hybrid algorithm the robust performance and anti-attack capability are greatly improved compared with the traditional single algorithm,which shows that the algorithm has certain practical value.A multiple images watermarking algorithm based on DWT and SVD transform and its' protocol are proposed.Multiple watermarking is an important research content of digital watermarking for second-hand market.Digital watermarking protocol for the secondary market is a theoretical analysis to solve the multiple watermarking using environment.Multiple watermarking has a high demand for robustness,invisibility and anti-attack performance.Compared with traditional single watermark algorithm,multiply watermark signals and batch signal processing problems are solved.SVD transform is used with DWT transform,which is used to replace the traditional single transformation and improves the invisibility and encryption performance of the watermark signal.DWT-SVD hybrid algorithm greatly improves the robust performance of the multiple watermarking result.The simulation results show that the proposed algorithm has a good practical value in the process of multiple watermarks' embedding and extraction,which has slight visual damage with better robustness performance and anti-attack ability.A second-hand market watermarking protocol based on iris recognition technology is proposed.Against the limitation of the traditional digital watermarking protocol,the iris recognition technology is put into the watermarking protocol to form an anonymous identity for the first time.Compared to the traditional seller-buyer watermarking protocol,this protocol solves the multi-level,multi-frame,second-hand market and other issues.DRM is the information exchanging medium.Using the iris management center successfully separates users' registration information and transaction information.This protocol solves the conspiracy attack and anonymous identity problems effectively.The simulation results show that the iris recognition algorithm can effectively identify the iris in the experimental environment.The watermarking signal of the secondary market can be effectively embeddedand extracted,which indicates that the watermarking protocol has good practical value.