数字媒体内容的版权保护研究

发布时间：2018-07-06 07:36

本文选题：数字资产管理 + 多媒体技术　；参考：《武汉大学》2014年博士论文

【摘要】：数字媒体是指以二进制数的形式记录、处理、传播、获取过程的信息载体,对数字媒体内容版权的保护是数字媒体传播的全过程中不可或缺的重要部分。数字媒体内容的版权保护方案需要保证一个文件的拥有者能够保持对文件的控制权,甚至当文件不在本地也能做到,其中包含了对数字信息操作权限的定义、管理和追踪等。数字媒体版权保护系统主要用于对数字媒体内容版权的保护,同时也能够保护企业的私密文件。本文通过研究数字媒体版权保护相关关键技术,分别就权限管理、加密算法以及扩散控制等技术方法进行了研究和改进。论文结合系统需求以及相关关键技术,形成了一套保护数字媒体版权保护的方案并加以实现,以阻止数字媒体内容被非法传播和使用,使之能够保护机密数字信息和数字媒体的知识产权。本论文首先对于本系统相关的一些理论和技术进行了简要分析,包括权限管理、密码技术以及扩散控制等,然后分别针对权限管理模型、AES加密算法、RC4加密算法、文件捆绑、进程隐藏、文件过滤驱动等技术进行了分析和改进,设计了一种扩展权利对象权限管理模型；提出了RC4加密算法的改进方法；提出了一套数字内容扩散控制的关键方法以及一套基于文件过滤驱动技术的文件透明加解密方法,并结合以上方法提出了一套数字媒体内容的版权保护方案和系统架构,最后实现了原理系统。系统主要用于保护媒体文件在传输过程中不被非法获取,在使用中不被非法扩散。其中服务器端由WEB服务器和授权服务器组成,前者用以管理用户账户,后者对媒体文件权限进行管控,自适应地选取特定的加密方式保证不同大小文件的安全性和传输的实时性；下载到客户端的是包含媒体内容在内的包文件,该文件自解包后激活其中的监控程序对用户的操作进行管控。本方案可以实现对数字媒体的通用保护,即与文件格式、文件内容无关。对于企业内部媒体内容防护这一应用场合,对本地的明文文件的加密是在Windows文件系统驱动层进行,通过对文件操作请求进行过滤、对文件头进行加密标记以及创建双缓冲处理文件缓冲内容等措施,可有效防止本地数字媒体文件被非法使用和明文的泄露。最后对论文进行了总结,阐述了论文的研究价值和创新,并对今后的工作进行了展望。
[Abstract]:Digital media refers to the information carrier which records, processes, disseminates and acquires the information in the form of binary numbers. The protection of copyright in digital media content is an indispensable part of the whole process of digital media communication. The copyright protection scheme of digital media content needs to ensure that the owner of a file can keep the control of the file, even when the file is not local, which includes the definition, management and tracing of the rights of digital information operation. Digital media copyright protection system is mainly used to protect digital media content copyright, but also to protect private files of enterprises. In this paper, the key technologies of digital media copyright protection are studied and improved, such as privilege management, encryption algorithm and diffusion control. Combining with the system requirements and related key technologies, this paper forms a plan to protect the copyright of digital media, which can prevent the illegal dissemination and use of digital media content. Enable it to protect the intellectual property rights of confidential digital information and digital media. In this paper, some theories and techniques related to the system are briefly analyzed, including privilege management, cryptography and diffusion control, etc. Then, the RC4 encryption algorithm, file binding, and so on, are respectively applied to the privilege management model, such as AES encryption algorithm, file binding, and so on. Process hiding, file filtering driver and other technologies are analyzed and improved, an extended right object privilege management model is designed, and an improved RC4 encryption algorithm is proposed. This paper puts forward a set of key methods of digital content diffusion control and a set of transparent encryption and decryption methods based on file filter driver technology, and puts forward a set of copyright protection scheme and system architecture of digital media content based on the above methods. Finally, the principle system is realized. The system is mainly used to protect media files from being illegally obtained during transmission and not to be spread illegally in use. The server is composed of Web server, which is used to manage user accounts, and authorized server, which controls the rights of media files. Adaptively select specific encryption methods to ensure the security and real-time transmission of files of different sizes; download the package files including media content to the client. The file self-unpack activation of the monitoring program to control the user's operations. This scheme can realize the universal protection of digital media, that is, file format, file content independent. For the application of internal media content protection, the encryption of local plaintext files is carried out in the Windows file system driver layer, and the file operation request is filtered. It can effectively prevent the illegal use of local digital media files and the disclosure of clear text by encrypting the file header and creating a double buffer processing file buffer content. Finally, the thesis is summarized, the research value and innovation are expounded, and the future work is prospected.
【学位授予单位】：武汉大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：G206

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