中文摘要：

线性网络编码作为一种新型的数据编码方式,它可以提高无线传感器网络的数据吞吐率、降低节点能耗、减少数据的传播延迟.由于无线传感器网络自身的特点,直接使用已有的线性网络编码协议将面临许多严重的安全攻击.指出了线性网络编码应用于无线传感器网络所面临的安全问题;并提出了一种安全的线性网络编码协议SEC.SEC既能够实现线性网络编码的优点,还解决了其在无线传感器网络中所面临的安全问题.

英文摘要：

As a new data coding method,the linear network coding can improve the data throughput of the wireless sensor networks（WSN）;decrease the energy consumption of the node and reduce the data delay.But for the limitation of WSN,if we directly applying the existing linear network coding protocols to WSN,there will be some security threats.How to ensure the linear network coding protocols against danger in WSN has become the hot issue.Two parts of our research are described.Firstly we present the security problems that come forth when the linear network coding is applied to WSN.Secondly SEC,a security broadcast based on linear network coding in WSN,is presented.SEC can achieve the merit of the linear network coding and solve the security problems that are previously presented.