【作者】 陈声扬；

【导师】 陈俊亮；

【作者基本信息】 北京邮电大学 ， 计算机科学与技术， 2010， 硕士

【摘要】 随着互联网的不断发展,网络极大的改变了人们的生活。网络上传递的信息种类越来越多,对计算机网络的数据传输技术也提出了新的要求,网络媒体分发技术也随之不断发展。P2P (Peer to Peer)是架构在互联网之上的一种覆盖网,它不同于传统客户端/服务器模式,P2P网络中的节点(Peer)可从多点获取资源,并共享自身已有资源。P2P技术在媒体数据分发上的优势也越来越得到展现。基于P2P的媒体分发系统逐渐成为研究热点。按照现有的P2P通信方式,在目前IPv4 (Internet Protocol version 4)与IPv6 (Internet Protocol version 6)共存环境下,一个IPv6的Peer是无法与网络中众多的IPv4的Peer进行通信以获取资源的。只有做好IPv4和IPv6网络下P2P通信的研究工作,才能深入研究基于P2P的媒体分发系统。伴随着P2P媒体分发技术的发展,盗版问题日益严重。基于P2P的媒体分发系统只有在DRM (Digital Rights Management)系统的支持下,才能阻止盗版侵权行为的发生,才能推进互联网的健康发展。本文首先调研了IPv4向IPv6过渡技术,结合P2P通信机制,提出IPv4与IPv6共存网络中基于请求转发机制的P2P通信方法,将双协议栈技术和P2P系统结合起来,利用双栈节点作为中转节点来实现资源在整个P2P网络中的分布扩散。本文使用OMNET++仿真平台模拟实现了该P2P通信方法,并对其进行了性能评估。通过仿真实验,证明本方法在IPv6网络演进的不同时期能维持整体P2P系统性能稳定。本文分析了DRM系统和P2P媒体分发系统的特点,研究了两者的融合方案。通过实验研究提出了可用于DRM系统的选择加密机制和信息隐藏技术。根据上述研究设计了P2P媒体分发系统中基于选择加密机制的DRM系统。最后本文实现了客户端版权管理子系统并进行了功能测试,验证了这些技术应用的正确性。更多还原

【Abstract】 With the development of Internet, network has greatly changed people’s life. There are numerous types of data transmitting on the network, which demands new data transmitting technology and promotes the development of media distribution system. P2P (Peer to Peer) is an overlay network built on Internet. It differs from traditional C/S mode. A peer in P2P can receive resource from other peers and share its resource with others. P2P technology has shown great advantage on media data distribution. The media distribution system based on P2P gradually becomes research hotspot.In existing P2P mode, an IPv6 peer cannot communicate with IPv4 peers which are majority in P2P system. Only we do a solid study on’P2P communication in IPv4 and IPv6 coexistence network, we can promote media distribution system based on P2P. With the development of P2P media distribution technology, the piracy is becoming a big problem. Only the media distribution system is supported by the DRM (Digital Rights Management) system, we can prevent the copyright pirate, so as to promote the healthy development of Internet.In this paper, we firstly investigate the IPv6 transition mechanisms. Combining the IPv6 transition mechanisms and P2P communication mechanism, we propose a P2P communication mechanism based on request forwarding in IPv4 and IPv6 coexistence network. In this method we use Dual-Stack technology on P2P system, which using a Dual-stack node as a forwarding node to spread the resource in the whole P2P network. This paper implements this P2P communication mechanism with the OMNET++ simulation platform and evaluates the performance of the proposed mechanism. The research shows the proposed mechanism can effectively solve the communication between IPv4 peer and IPv6 peer in P2P network and keep the system performance stable.In this paper, we analyse the P2P media distribution system and DRM system, and then research the combine method of the two systems above mentioned. With the related experiments, we propose the selective encryption mechanism and the information hiding technology which can be used in the DRM system. With the research above mentioned, we design DRM system based on selective encryption mechanism in P2P media distribution system. Finally, this paper implements the copyright management subsystem within the P2P media distribution system. And then we do the functional tests to verify the validity of the application of these technologies.更多还原