Research On Identity Authentication Of WSN Node Based On Geographic Location

WSN(Wireless sensor network)nodes have the function of perception,computing and communications.Because WSN without prior deployment node,typically by node location to real-time monitor,perceive and collect the various environments within the network or test object information,so the node authentication plays an important role in WSN applications.Existing identity authentication algorithm is limited by a variety of conditions in real applications,it is an important direction of WSN research to design the node identification improvement algorithm based on low computational complexity,low communication load and low node location information detection rate.The WSN nodes authentication based on the geographic location are mainly DNA(Distributed Node Authentication),DBNA(Distributed Bulletin board-system Node Authentication)and IDNAS(Improved Distributed Node Authentication Scheme)and other three algorithms.The DNA algorithm authenticates the identity of the node by authenticating the geographic information of the node stored by the neighbor node;this algorithm has the problem of large computational complexity,large network consumption and large network communication load.The DBNA algorithm improves the DNA algorithm,but the number of invalid authentication will increase,and the authentication efficiency is low when the network node is large,the scale is large,the communication overhead is large.The IDNAS algorithm solves the complexity of Euclidean distance multiple calculation,when the number of sensor nodes is huge,the time and energy consumed by the regional division will reduce the efficiency of the authentication.Different factors that lead to the decrease of the efficiency of node identification,in combination with DNA,DBNA and IDNAS main ideas,this paper proposes an efficient WSN node authentication algorithm based on geographical location,and improves the WSN node authentication algorithm based on the geographical location mainly from the regional partition model and node location information is detected rate two aspects.In terms of improving zoning model,first using the storage information of the initialization node to add some authorization information,second using of the these add information contained in the node,only requires area division of authentication node,obtains the corresponding authentication information by using of adjacent nodes,reduces duplication of operation;In terms of node location information is detected rate,the number of regions and nodes are basically unchanged,reduces the information exposure rate by reducing the number of neighbor nodes method,further reduces repeated verification of invalid node number and the computational complexity,reduces the communication load,reduces the rate of node location information is detected.Using MATLAB simulation experiment in the same verification environment show that the comparison and the analysis between the traffic load and node location information is detected rate in two aspects,this article puts forward the improved algorithm node communication load has a slope ratio of 75%,and the communication load is reduced.Improved algorithm can update the node information in real-time through the change of the node location information,the location of the node information detection rate is low and remains at around 5%,certification effect is improved.