针对无线传感器网络中距离无关的定位技术,提出了DV-Hop定位中普通节点被俘获的欺骗攻击模型,分析了这种欺骗攻击模型对DV-Hop定位过程的影响,进而提出了一种抵御欺骗攻击的DV-Hop安全定位算法.首先,在普通节点端提出了基于发送-转发信息一致性的检测机制来检测恶意节点;其次,在汇聚节点端提出了基于消息转发链举证的检测机制来确定恶意节点;最后,当汇聚节点检测出存在恶意节点进行篡改攻击后,汇聚节点通报全网弃用恶意节点转发的数据分组并重启定位.仿真结果表明,本文提出的安全定位算法可以有效滤除恶意节点,且安全定位算法的定位性能与无攻击下的DV-Hop定位性能基本相当,可以有效解决欺骗攻击对DV-Hop定位过程造成的影响.%Aiming at range-free based positioning technology in wireless sensor network,we propose a spoofing attack model with normal nodes compromised in the DV-Hop localization procedure and analyze the effects of the spoofing attack.Then,a DV-Hop secure localization scheme against the spoofing attack is proposed.Firstly,for the normal nodes,we put forward a detection mechanism,based on transmitting-forwarding information consistency,to detect malicious nodes.Secondly,for the Sink node,we put forward a detection mechanism,based on message forwarding chain,to identify the malicious nodes.Finally,when the Sink node detects that there has spoofing attacks in the networks,it broadcasts malicious nodes and then restarts the position process.The simulation results illustrate that the proposed secure localization scheme can efficiently filter the malicious nodes and the positioning performance of secure localization algorithm is similar to the normal DV-Hop positioning.Thus,the proposed algorithm can effectively solves the impact of the spoofing attack on the DV-Hop positioning process.
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