基于IMS的数字版权保护技术研究

发布时间：2018-11-24 12:49

【摘要】：随着数字媒体技术以及网络通信技术的快速逐步发展,某些用户利用互联网通过某些手段能够无偿的获取某些需要付费的数字内容服务,这侵害了这些提供内容服务提供商的权利。数字版权管理(Digital Rights Management, DRM)指的是采用信息安全技术手段,在保证具有特定权限的用户对数字媒体内容能够正常使用及对保护数字媒体的创作者和拥有者的权利。当前的数字版权保护的解决方案是在用户体验服务过程中利用DRM对媒体内容方面进行管理,实现的思想是提高对数字内容复制的技术和成本门槛来提高对数字内容的非法复制的难度。IMS是3GPP提出的标准化的基于IP的开放的架构来实现多媒体业务管理,实现会话控层与承载层相分离,业务层与控制层的分离,使用SIP协议实现对用户会话进行管控。本文通过将能够对内容进行管控的DRM与能够对信令过程进行管控的IMS相结合来有效解决数字版权保护问题。基于IMS的数字版权保护技术重点解决问题包括：域用户,实现实时记帐／计费,实时DRM,标准化会话管理。在研究和分析了DRM和IMS相关理论和技术的基础上,设计一个模型,该模型利用DRM管理和控制会话内容,利用IMS管理媒体会话。在IMS中设计符合IMS标准的支持DRM的SIP信令过程,扩展SIP信令消息的消息体SDP来支持DRM内容相关的表达;计费过程涉及到的媒体内容;修改ROAP(版权获取协议)支持模型用下载版权对象。最后,本文通过设计原型系统来进行验证：使用开源项目OpenIPMP来实现DRM的相关流程及相关的数字加密技术,实现支持DRM的IMS应用服务器和媒体服务器,实现DRM授权对象服务器和支持DRM的IMS用户终端,使用开源项目SIPp来实现符合IMS标准的SIP信令流程。基于IMS的数字版权保护技术不但能继承现有的DRM技术对数字内容保护的安全性,而且能利用IMS体系架构提供标准的SIP信令过程实现对信令会话的管控,最后通过模型验证了将DRM与IMS相结合来实现数字版权保护的合理性和有效性。
[Abstract]:With the rapid development of digital media technology and network communication technology, some users can obtain some digital content services that need to be paid for free by some means through the Internet. This infringes on the rights of these content providers. Digital rights management (Digital Rights Management, DRM) refers to the use of information security technology to ensure that users with specific rights can use digital media content normally and protect the rights of creators and owners of digital media. The current solution of digital copyright protection is to use DRM to manage media content in the process of user experience service. The idea is to improve the technology and cost threshold of digital content replication to increase the difficulty of illegal reproduction of digital content. IMS is a standardized open framework based on IP proposed by 3GPP to realize multimedia service management. The session control layer is separated from the bearer layer, and the service layer is separated from the control layer. The SIP protocol is used to control the user session. In this paper, the problem of digital copyright protection is solved by combining the DRM which can control the content and the IMS which can control the signaling process. The key problems of digital copyright protection based on IMS include: domain users, real-time accounting / billing, real-time DRM, standardized session management. Based on the research and analysis of the theories and technologies related to DRM and IMS, a model is designed, which uses DRM to manage and control session content and IMS to manage media sessions. In IMS, we design the SIP signaling process that conforms to the IMS standard, extend the message body SDP of the SIP signaling message to support the expression of DRM content, and the media content involved in the charging process. Modify ROAP (copyright acquisition Protocol) support model for downloading copyright objects. Finally, this paper designs a prototype system to verify: the use of open source project OpenIPMP to achieve the DRM related processes and related digital encryption technology, the implementation of DRM support IMS application server and media server, The DRM authorization object server and the IMS user terminal supporting DRM are implemented. The open source project SIPp is used to implement the SIP signaling process which conforms to the IMS standard. The digital copyright protection technology based on IMS can not only inherit the security of the existing DRM technology for digital content protection, but also use the IMS architecture to provide the standard SIP signaling process to realize the control of signaling session. Finally, the rationality and effectiveness of the combination of DRM and IMS are verified by the model.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.8

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