Research On The Key Aware Of Security Management Scheme For Clustering In Wireless Sensor Network

As a new technique of collecting data,wireless sensor networks(WSN) has been caused more and more attentions in many fields.Because of opening of deployment area and broadcasting of wireless sensor networks, the network is prone to be suffered monitoring and various kinds of malicious attacks,network security has become extremely important.Key management is the primary problem for establish a security network,which has been occupied an important position in network security.By its own resource constraints of sensor nodes,key management scheme used in traditional networks are not fit for WSN,key management becomes a hot research field in WSN.Based on system learning and summarizing of current key management in WSN,a new security method of key aware for clustering has been proposed in this thesis,and researches mainly include:First,to prolong the lifetime of the network and enhance the efficiency of energy utilization,a clustering hierarchical structure is used in network.In order to more effectively balances the network energy consumption to each node,considering the defects of the typical LEACH protocol,this thesis proposed an improved algorithm.The improved algorithm selects cluster heads according to their residual energy and coordinate,and cluster nodes communicate with each other through multi-hop with shortest neighborhood distance.Compared to LEACH algorithm,the simulation results prove that the improved algorithm effectively prolongs the network's lifetime and reduces energy consumption.Second,based on the clustering structure,randomly key model is adopted in key distribution which cluster head get sub-key pool from base station and cluster nodes get keys from cluster head.On the one hand,this manner saves storage space,on the other hand,it also ensure that the safety of other clusters will not affected by one cluster's key betray.Third, between the nodes communication in the cluster,it transforms partial keys stored in the sensors and session key into special information through hash operation.Because of each node have a different session key in the cluster,there is any influence to other nodes even if the attackers intercepted special information which between the connect of communicate nodes.Through the simulation to compare with other algorithms,the results show that this scheme have a better security performance while remaining network connectivity unchanged.