Research on relationship of multi-sorts digital watermarking & ODRM

To the question of D²RM, tracing, security validation and copyright protection for transmitting digital files, firstly, the system and relationship of multi-sorts watermark is deeply studied, and the technological principles of multi-sorts watermark is defined. Then, digital copyright management technology is studied, meanwhile, ODRM is put forward and its testing project during the implementing is analyzed. Finally after detection and analysis to texts and images, proved the solution is feasibility, which will better achieve the digital copyright protection and transmitting trace.