Study On WSN Secure Communication Model Based On Secret Sharing

The wireless sensor networks(WSNs)are composed of a large amount of low-price sensor nodes.Because of the characteristics of sensor network such as multiple hops communication,large-scale distribution in unprotected area,limited energy,and node easily captured,security issues are becoming much more and more important.In these applications,the information may suffer from eavesdropping even malicious tampering,sensor node may be captured even pretended to be jactitator,whether Internet security will significantly impact on wireless sensor network's applications.In order to realize the network security,it need establish the security system.So the key management is the basis of safety system establishment,whose purpose is to ensure the security of key,which covers the whole life cycle of the keys.Once the key leakage will directly cause expressly content of leakage,so the key management scheme is directly related to the sensor network's security.In hierarchical wireless sensor network the master key protects all the keys.If the master key is managed by the cluster head,there will be the following drawbacks:the cluster head is needed to get the master key every time;Once the cluster head loses efficacy due to the energy consumption,the system's operation will be affected;the cluster head captured will reveal the master key,which would threaten the entire system security.In the planar structures of wireless sensor network model,there is no central management node,the network is formed by the self-organization coordination algorithm,which is quite complex.In this paper we propose a security model of wireless sensor network based on the secret sharing. On the basis of clustering protocol, the sensor network is divided into some domains respectively. All domains cover the entire network. Therefore, the network system is divided into a series of domains which are close to each other and equal. Through replacing the cluster head with the council, it is helpful in balancing communication load in domain and weakening the effect and influence of the single node. We are using the method of dynamic gateway, which shields the domain key nodes. After sufficient research and analysis, the performance analysis of the network model is given further with simulation software Matlab. From the simulation results, due to the introduction of the council of structure, the model we design is much higher performance than the plane structure model in safety, and also much higher in error-correction. But in delay aspects it is much poorer than the plane structure of network model.