基于二项分布的无线传感器网络信任管理系统

由于无线传感器网络不同于传统网络的特点，导致其很容易受到来自妥协节点的内部攻击。信任管理系统是防御无线传感器网络内部攻击的最有效方法。针对无线传感器网络节点信誉和信任的评估，我们改进了用于无线传感器网络的基于贝塔的信誉系统BRSN( Beta Reputation System for Sensor Networks)，提出了基于二项分布的无线传感器网络信任评估系统BTMS( Binomial-based Trust Management System)。 BTMS基于对节点行为的监控，利用二项分布来描述节点信誉的分布，并进一步得到节点信任值，从而指导中继节点的选择，降低内部攻击的危害。实验结果表明，利用BTMS可以有效的防御来自妥协节点的内部攻击，提高网络安全性。

Binomial-based Trust Management System in Wireless Sensor Networks

Since the wireless sensor networks ( WSNs ) are different from the traditional networks, it is very susceptible to the internal attacks from the compromised nodes. The trust management system is the most effective method to defense the internal attacks of WSNs. Aiming at the reputation and trust evaluation of WSNs,the beta rep-utation system for sensor networks is improved,and the binomial-based trust management system( BTMS) is proposed in this paper. Based on the monitoring of node behavior,the binomial distribution is used to describe the node repu-tation distribution and calculates the node trust value in order to optimize relay nodes selection and mitigate the risks of internal attacks. Simulation results show that the proposed BTMS can effectively defense the internal attacks from the compromised nodes and improve the network security.