一种规避传感器网络选择性转发攻击的方法

摘要

在以数据为中心的无线传感器网络中，当恶意节点出现并发起选择性转发攻击时，出现的问题是恶意节点未能转发来到的信息，而丢掉部分和全部的关键信息，会严重破坏数据的收集，降低网络的可用性。提出PDMCS（Polynomial—based Defense Mechanism Countering the Selective Forwarding Atracks），一个轻量级的防止选择性转发攻击的安全方案。方案中，事件数据包被划分成多个数据子包，通过多项式将这些子包转换成不同的数据片，结合动态多路径路由算法把数据发送到基站。使用这样的技术，可以减轻这种攻击的破坏，提高系统的鲁棒性。用理论分析扣仿真探究了方案能够权衡通信负载和安全可靠性。仿真实验结果证明方案在面临大量恶意节点时能够获得高的成功接收率，同时通信量也在合理的范围内。%In data-centric wireless sensor networks （WSN）, the malicious nodes may drop some crucial data packets, which seriously destroy the network＇s data collection and decrease the availability of sensor services. PDMCS （Polynomial-based Defense Mechanism Countering the Selective Forwarding Attacks） which is a lightweight security scheme for preventing selective forwarding attacks is proposed. Employ the polynomial-based method to generate x distinct shares to send these datas to the base station so that any combination of at least t＋1 shares suffices to reconstruct the original data. Using this technique, the impact of this type of attack can be alleviated and the robustness of the network can be improved. Explore PDMCS that enables the tradeoff between the security reliability and the communication overhead using both theoretical analysis and simulations. The simulation results show that the scheme can achieve a high success ratio in face of a large number of malicious nodes, while the communication overhead can be controlled within reasonable bounds.