The Research On Mobile Digital Right Management And Digital Watermark Technology

Electronic commerce has become a huge business and a driving factor in the development of the Internet. Online delivery services are well established and will, with the advent of evolved 2G and 3G mobile networks, soon be complemented by their wireless counterparts. Furthermore, online delivery of digital media, such as MP3 audio or video, is very popular and will become an increasingly important part of e-commerce and mobile e-commerce (m-commerce). However, a major obstacle for digital media distribution is the possibility of unlimited consecutive copying in the digital domain, which threatens intellectual property rights. Digital rights management systems are required to protect rights and business'profit. Digital watermarking makes possible to embed a watermark (such as identification data, serials number, text or image etc.) to multimedia documents allowing copyright protection, secret communication, document authentication and tracing mechanisms. To solve digital media's piracy problem, thinking of the chacter of mobile value service, a watermark based mobile digital right management (W-MDRM) system model is proposed in this paper. This model employ digital watermark technology and mobile handset's speciality, to protect the owner and the publisher's profit. And then the digital media can be distributed using mobile network. In the W-MDRM model, digital watermark, which is the part of the basis support subsystem of the model, are very important. It is not only the basis of the whole model's using control and transmission control, but also is the effective way to protect the author's right and the publisher's profit. At present, the research on DRM is mainly focus in the wired netwrok, and there is some work is relaton to mobile DRM. But along with the development of wireless network, the mobile DRM will become more and more important. In this paper, we consider the popular problem of piracy on digital media, a mobile digital rights management and security technology model based on watermark technology is presented, the components of the system and the mechanism of each module are also discussed. In this system, the information of the credible mobile terminal, would be embedded into the digital media twice by two different methods, symmetric and asymmetric digital watermark technology. And then the digital media will be sent to the legal customer by mobile communication network. The asymmetry watermark is used for copyright protection and symmetric watermark is used for usage control. The system is used for mobile terminal presented in this paper overcome the drawback of watermark on the fixed internet. This protects the rights of the digital media owner and publisher, and corresponds with the development of the mobile communication.