无线传感器网络中检测女巫攻击的节点定位方法

Detection of Sybil Attack in Localization Mechanisms of Wireless Sensor Networks

为了有效抵制女巫攻击,在攻击存在的情况下提高无线传感器网络节点的定位精度,分析、总结了女巫攻击所固有的薄弱环节,提出了基于接收功率验证的检测女巫攻击的节点安全定位方法。检测机制分为两步,首先检测节点通过比较接收功率,从所接收的全部信标节点中选择出距其距离相同的信标节点,列为可疑Sybil节点,然后通过邻居节点间的信息交互和距离验证,最终检测出攻击节点,利用去除了Sybil节点的信标节点集合实现定位。仿真实验显示,当存在攻击时,检测成功概率能达到95%以上,定位精度提高了9～11.64 m,表明该方法能有效检测女巫攻击,实现节点安全定位。

In order to resist the Sybil Attacks effectively and improve the accuracy of location discovery for wireless sensor networks（WSNs） in hostile environments where Sybil attacking nodes exist, the vulnerability of Sybil Attacks is analysed and summarized. And effective secure location approach to detect such Sybil Attacks through verifying the received power is proposed. The detecting mechanism is divided into two steps. First, the detection node finds all suspicious Sybil beacon nodes with the same distance from detection node to itself by comparing the power. And then, the Sybil beacon nodes are removed out through mutual information exchanging with neighbors. Simulation results show that the successful detection probability can achieve 95% and the proposed algorithm can improve the location discovery accuracy by 9 m to 11.64 m. Experiment proves that the attacking nodes can be detected effectively by utilizing the proposed approach and the nodes＇ orecise locations can be obtained.