Research On Hybrid Key Management Mechanism Of Wireless Sensor Networks

Wireless sensor network is a kind of large scale,non partition and multi hop communication network.Wireless sensor networks consist of a.large number of wireless sensor nodes.The sensor node is mainly used for the perception of data and the collection of information,processing the collected data information,and sending the information to the legitimate users through the Internet or the traditional network.Wireless sensor nodes have the characteristics of low cost,low power consumption,data acquisition,data processing and wireless communication.A large number of nodes form a network through the self-organization,usually deployed to no one area or the environment is harsh,and other complex environment.With the rapid development of wireless sensor networks,the security of wireless sensor networks has become an important issue.The key management is the most basic and most important problem in the security mechanism,so it is very necessary to introduce the key management mechanism.Aiming at the problem that the connectivity of wireless sensor networks is not high,the security is low,the storage and communication overhead is relatively large,this paper proposes a location based random key pre distribution scheme.The scheme uses the location information of nodes in wireless sensor networks,and establishes the corresponding relationship between the location and the key pool.By using the key deletion strategy based on node location distribution,the probability of the same key between adjacent nodes is increased,and the network connectivity is achieved with the conventional key storage.Theoretical analysis and simulation data show that the proposed scheme improves the performance of wireless sensor networks based on improved security,such as the communication overhead,the ability to resist node capture and so on.According to the anti acquisition performance is not strong at this stage the node key pre distribution scheme of the network connectivity rate is not high,storage overhead,communication load and other problems,this paper proposed a key pre distribution scheme based on the location of the improved(LKC+ scheme).The scheme is based on the LKC scheme,which has improved the key deletion strategy,increase a key update operations,improve the overall use of the scheme of the key rate,more rational management of the key pre distribution,and with less keys to achieve connectivity rate.The simulation results show that the proposed scheme has higher connectivity and better anti node capture ability.