Research On Privacy Preserving Technology Of Routing Protocol In Wireless Sensor Networks

After years of development and application,wireless sensor networks has been widely used.In recent years,people pay more and more attention to privacy,and with the more and more use of sensor devices in people's lives,privacy preserving has become an indispensable part.Because of the particularity of wireless sensor network,the complex calculation or encryption scheme is not suitable for the network itself.Therefore,how to achieve energy-eifficient routing protocol with good privacy performance is an urgent issue.In the face of the demand of high comprehensive performance,through the analysis of data aggregation mode and privacy scheme of wireless sensor network,this thesis puts forward a series of improvement methods for data aggregation privacy protection scheme of wireless sensor network.The main work of this thesis is as follows:First of all,aiming at the problem of too much computation in the privacy protection scheme of data aggregation based on cluster structure,this thesis proposes to use the data sensed by the nodes,combined with the fuzzy rating to divide the nodes in the region,so that the nodes with high data importance remain active while the rest nodes temporarily sleep.In addition,a simplified calculation method is used.At the same time,a new scheme is proposed in clustering method and routing selection between clusters.The simulation results show that our scheme has lower computation and communication and good privacy preserving performance.Secondly,in the privacy scheme based on TAG aggregation tree,because TAG is based on the directed diffusion,the route may not be the best,to solve this problem,a routing scheme based on inter cluster planning is proposed.By using the hierarchical network structure and tree routing,and combining with the relevant properties of the node itself and the candidate nodes,the path selection can be comprehensively evaluated so as to achieve the global optimal route.At the same time,a new clustering method is proposed,and the privacy preserving scheme within the cluster is improved.The simulation results show that the scheme proposed in this chapter can keep better privacy performance while reducing the communication and computation.Finally,in the privacy protection scheme of hop by hop or homomorphic encryption,the computation is complex and the communication efficiency is low.To solve this,a privacy scheme based on task transformation is proposed.At the same time,new clustering method and routing scheme are adopted for nodes in the region.In this way,the members in the hierarchical network can hide the data through task transformation and transmit it step by step according to the tree route.Then,The simulation results show that the scheme has lower computation and communication cost,and better privacy performance.