Research On Secure Localization Algorithm For Wireless Sensor Networks

The localization technology in wireless sensor network is the necessary support for data exploration and integration.Based on the requirements,wireless sensor network would be deployed in unattended or even hostile environments sometimes.The attacker could make the detection data of sensor network meaningless through affecting the normal localization.Thus the localization security issue of wireless sensor network cannot be ignored.This paper mainly focuses on the security localization algorithm of wireless sensor network and is studied based on the security,localization accuracy,localization node ratio,energy consumption factors and so on.The main work of this paper is as follows:Firstly,the improved DV-Hop localization algorithm based on the quantization of the time difference of arrival(TDOA)is proposed.The core idea is that the node takes the use of the TDOA distance measuring module to measure the distance between the other nodes in the communication range and transform the measured distance into hopcount between two nodes according to a certain quantization relationship.And use the hop-count in DV-HOP localization,for improving the accuracy of the value of hops between nodes in the DV-HOP localization algorithm.This algorithm combines the advantages of TDOA and DV-HOP algorithms,and provides a new idea for the fusion and complement between distance-based and non-distance-based localization algorithms.Secondly,this paper summarizes the various malicious attacks that the localization algorithm may suffer,researches the attack principle and simulates the malicious attacks' influence on the localization algorithm performance.Eventually,this paper analyzes the advantages and disadvantages of the existing security localization algorithms.Thirdly,considering that the node replication attack and Sybil attack must pass the neighbor's node identification firstly,the method of using the batch of key,the number allocation and mutual monitoring among neighbor nodes is proposed to detect the replication node and the Sybil node,and prevent them from attacking network.Finally,through the theoretical analysis and simulation,the performance of the security localization algorithm to resist node replication attack and Sybil attack is verified.Finally,the wormhole attack is divided into single-hole wormhole attack and duplex wormhole attack according to the relative position of wormhole node.And the influence of wormhole attack on APIT localization algorithm is studied deeply.The RSSI value is calculated by using the virtual neighbor node instead of exchanging the RSSI value between the real neighbor nodes in the traditional APIT algorithm.Finally,through the theoretical analysis and simulation,the performance of the security localization algorithm to resist wormhole attacks is verified.