基于信息论安全的防窃听网络编码方案

为提高组播通信网络中信息传输的安全性，提出一种基于信息论安全的网络编码方案。利用大素数及其本原根产生不同的噪声符号，并将噪声符号与原始信息进行混合，达到隐藏信息的目的。分析结果表明，该方案通过舍弃少量带宽，使网络编码以很高的概率达到信息论安全的要求，当信源与信宿之间有一条专用的安全信道时，可在不增加通信开销的前提下使网络的信息论安全概率为1。

Network Coding Scheme Against Wiretapping Based on Information Theory Security

In order to improve the security of information transmitted in a multicast network, this paper proposes a network coding scheme based on information security. A large prime number and its primitive root produce different noise symbols, and the symbols are mixed with the original information to achieve the purpose in hiding information. Analysis results show that the scheme is able to make network coding a very high probability of information theory safety by swallowing a small amount of bandwidth. When a dedicated secure channel between the source and sink is usable, the secure channel algorithm can achieve the probability 1 of information theory security without increasing the overhead traffic.