基于网络编码的传感器网络防窃听技术

Network coding anti-eavesdropping system for wireless sensor networks

对基于网络编码的无线传感器网络防窃听技术,该文采用线性网络编码技术,建立了多条不相交多路径,通过源节点和中间节点对原始数据包和接收到的数据包进行编码,窃听节点只有在接收到处于不同链路上的足够数据包数才能够成功解码获得有价值的数据。通过理论分析研究了节点通信能力和网络覆盖率的关系。结果表明:窃听者通常只有大幅增加单个节点通信半径,或者采用多节点协同窃听方式,才能提高成功窃听的概率。

A network coding based anti-eavesdropping method was developed for wireless sensor networks.Linear network coding is used with multiple disjointed paths to the sink nodes with encoding of the original packets and re-encoding of received packets at the source node and intermediate nodes.The eavesdropper can recover the original packets only if it obtains enough encoded packets.Thus,the network privacy is enhanced.An analysis of the rate of coverage and the node transmission ability shows that the eavesdropper needs to enlarge its communication radius or cooperate with other eavesdroppers to increase its probability of successfully eavesdropping.