Research Of Anonymity Communication Based On Secure Network Coding In NDN

With the rapid development of Internet in recent years, the Internet becomes a content sharing platform, and demand of the network increasing, even if the original simple level of IP address has been amended many times, but still can't meet the needs of the addressing. For content distribution service is the main service in future of the Internet, named data network(NDN) because of its design centered on information, become one of the most competitive architecture.NDN design introduces security mechanism, such as signature, etc. However,due to the NDN network allows the use of caching mechanism in network and allow names to publish and subscribe to content, makes the NDN privacy(such as name privacy, content privacy, signature privacy, user privacy) become more prominent.That commonly used in traditional network the way of solve the problem of user privacy is anonymous communication technology, anonymous communication mainly by forwarding agent, encryption, confusion, broadcast and information segmentation method. The goal of this thesis is to design applicable to the NDN anonymous communication protocol.In view of the user privacy NDN, NDN anonymous communication protocol based on network coding is proposed. The anonymous technology based on network code in the agreement, well solves shortcomings of NDN anonymous communication system ANDa NA, such as the need to deploy a large number of repeaters and the problem of encryption overhead. In addition, the NDN network due to allow intermediate nodes cache content, cause cache privacy problems.Researcher often uses for data itself encryption to protect the cache privacy and network code can be regard as a way of encryption. In this thesis, during the content return stage of agreement use network coding to encrypt content to protect the content. In this paper, the anonymous communication protocol optimizes the network load and improve the transmission rate and anonymity degree.In view of the network-interested flood that common attacks in NDN. SANC strategy is presented in this thesis, to embed the authentication key in network coding, to validation source of interest packet. To improve security enhancements of network coding used in protocol, coding coefficient is encrypt usinghomomorphic encryption operation, homomorphic scheme use the many-to-one homomorphic encryption, achieve only the destination node can decrypt data,improve the ability of against eavesdropping.Finally, this thesis has conducted the analysis of the degree of anonymity, with information entropy method to calculate probability of unidentified of the identity of the users and the recipient, and we focus on the four common anonymous web attacks, analysis security of the proposed protocol, further comparing performance with relevant solutions.