Drm Copyright Protection System Of Electronic Document-based Design And Realization

Guaranteeing the security and the integrity of information plays an important role in the research of information content security , which is also a key element in the research and development of information security both at home and abroad. Currently more and more documents and files, especially those with sensitive information, are being distributed, transmitted and stored in the form of electronic files in almost all kinds of internal netoworks such as E-Government and enterprise netoworks. The problem is , however, electronic files are easily copied even without any trace at all, which brings about the severe problem of information leak. Therefore, it is urgent to solve the problem of how to prevent illegal access, copy and transmission in the field of information content security.Data Right Management (DRM) technique proves to be an efficient technique in ensuring the security and controllablity of electronic documents when being distributed and used. Not only can DRM prevent unauthorized user from illegal access to electronic documents, but also it can prevent authorized user from modifying, copying, transmitting and printing the electronic documents without authorization.Through analyzing and studying the rights protection of electronic documents based on DRM technique, a protective system for the rights of electronic documents is also being designed and realized, which is composed of electronic documents packed implement, a server for authorization and client browser. This thesis mainly contains the following subjects:1. A systematic analysis and research of DRM including its basic function and crucial technique mainly concerned in realizing rights managment system.2. A detailed discussion of the rights managment technique based on DRM and its realization mechanism. We propose EDRP system, which includes a systematic structure and workflow.3. A detailed discussion of the workflow and modular design of the two sub-systems of EDRP, electronic documents packed implement and server for authorization.4. A functional test for these two sub-systems, through which we proved its efficiency and feasibility of the entire system.