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在无线传感器网络源位置隐私保护问题中,针对具有局部流量分析行为的逐跳反向攻击者,提出了基于随机角度和概率转发的源位置隐私保护路由协议RAPFPR。该协议主要分为两个阶段:真实源节点根据随机角度和距离的有向路由阶段,幻影节点到基站的概率转发路由阶段。协议产生的幻影节点能够很好地均匀分布在真实源节点周围,且采取概率转发路由大大减少了重合路径的产生,增加了逐跳反向攻击的难度。仿真结果表明,与现有的隐私保护方案相比,该路由协议能够在不显著增加通信开销的前提下,有效延长网络的平均安全时间,具有很好的隐私保护性能。
In the privacy protection of WSN source location, this paper proposes a source-location privacy-preserving routing protocol RAPFPR based on stochastic perspective and probabilistic forwarding for hop-by-hop reverse attackers with local traffic analysis. The protocol is mainly divided into two stages: the real source node according to the random angle and distance of the directional routing phase, phantom node to the base station of the probability of forwarding routing phase. The phantom nodes generated by the protocol can be evenly distributed around the real source nodes, and adopting probabilistic forwarding routes greatly reduces the generation of overlapping paths and increases the difficulty of reverse hop-by-hop attacks. The simulation results show that compared with the existing privacy protection schemes, the routing protocol can effectively prolong the average security time of the network without any significant increase in communication overhead, and has good privacy protection performance.