基于改进网络编码的匿名通信机制研究

Anonymous communication mechanism based on improved network coding

针对现有基于网络编码的匿名系统,由于转发节点的不稳定性以及匿名消息的多路径转发,使得数据发送的成功率较低的问题,提出了一种基于网络编码与数据冗余方法的新匿名通信机制ACSNC(anonymous communication system based on network coding)。首先采用数据冗余机制对要发送的数据进行冗余分片,并沿多条路径发送;然后中间转发节点对信息进行随机编码后转发,使信息通过节点前后的统计特性发生变化;最后,目的节点根据收到的数据片与编码系数恢复匿名信息。仿真结果表明,该机制在显著提高数据发送成功率的基础上,能够有效地保障通信的匿名性与安全性。

In the existing anonymous system based on network coding,the success rate of data transmission is low due to the instability of forwarding nodes and the multipath forwarding of anonymous messages.Aiming at this problem,this paper proposed a new anonymous communication mechanism ACSNC based on network coding and data redundancy method.This mechanism first adopted a data redundancy mechanism to redundantly fragment the data and sent it along multiple paths.Then,the intermediate forwarding node randomly encoded the information and old forward the information to change the statistical characteristics while information was passing through the node.Finally,the destination node recovered the anonymous information based on the received data slice and coding coefficients.Simulation results show that the mechanism can effectively guarantee the anonymity and security of communication on the basis of significantly improving the success rate of data transmission.