基于网络编码的信息流重构匿名通信机制

摘要

The existing communication mechanism based on PKI is difficult to apply to a distributed environment with no trustworthy center. This paper proposed a new kind of the anonymous communication mechanism NCBACM which based on the network coding technology. NCBACM proposed that every piece was coded by the random coding coefficient and also chopping the path construction information and data messages into slices, and then coded by the random coding coefficient . Scattering the symbols on the different paths could also make sure the anonymity of the information transmitted between the nodes and also make the anonymous paths be set up without encryption and decryption. Theoretical analysis and simulation results show that compared with only depending on the source node encode mechanism, this mechanism has increased the difficulty of the data message analysis , and significantly improve the security of the anonymous system.%现有的以PKI为基础的匿名通信机制很难应用于无信任中心的分布式环境下.基于网络编码技术提出了一种新的匿名通信机制NCBACM.NCBACM利用每个编码节点都对转发信息进行随机编码的思想,将匿名路径信息以及数据消息进行分片、编码、混淆后分散在不同的传输路径上进行传输,在无须加/解密变换的情况下进行匿名路径的建立,同样可以有效地实现节点闻信息传输的匿名性.理论分析和仿真结果表明,与只依靠源节点进行编码的机制相比,新的机制通过增加中间节点的致乱混淆功能,使敌手对窃听到的信息进行数据包分析的难度增大,显著提高了匿名系统的安全性.