防窃听的弱安全网络编码

网络编码可以达到网络的最大理论多播容量,它的提出是通信领域的一项重要突破。在网络编码实际应用中,安全问题不可忽视。文中提出了一种防窃听的弱安全VSWNC算法。首先VSWNC要求信源信宿共享一个随机数生成器；其次信源端可用随机种子r在随机数生成器上生成一个范德蒙行列式P,随后用P对信源信息进行预编码处理；最后信宿端可通过r得到P从而正确解码。把VSWNC算法应用于随机网络编码中,在牺牲少量带宽的情况下能保证以概率1达到弱安全要求。

A Weakly Secure Network Coding against Wiretap Attack

Network coding can achieve the theoretical multicast capacity of a network,and it is an important breakthrough in communica-tion field. The security is an important issue when network coding is used in practical network. In this paper,provide a VSWNC algo-rithm,which is weakly secure network coding algorithm against wiretap attack. Firstly,in VSWNC algorithm the source and the destina-tion share a random number generator. Secondly,in source node,a Vandermonde determinant P is generated using random number r in the random number generator and source message can be pre-coded using matrix P. Finally,user node can decode correctly using matrix P a-chieving from r. Using VSWNC in random network coding,can achieve the weakly secure condition at probability of one with sacrificing a small amount of capacity.