| In existing key management schemes in wireless sensor networks,a large number of irrelevant keys will be stored,which waste the storage space of the nodes and affect the operating efficiency of the entire network.Secondly,in the recent key management schemes in wireless sensor networks only the initial deployment of the network is considered,or the update of the node is discussed.However,it is not noticed that,after a period of time,different weighted tasks are taken on by different nodes in the network The resources between nodes have lost their balance.The existing key management schemes only consider the same storage and computing capabilities among nodes,but cannot handle the key negotiation and identity authentication requirements between nodes of different resource levels.In addition,the existing dynamic network of key management and identity authentication schemes,especially in the clustered network architecture,consider that the network has the same cluster structure,and in the actual dynamic environment,the cluster structure is not the same size.Therefore,it is not practical to use the same threshold based on the intra-cluster group key generation mechanism of secret sharing.This paper mainly studies the above three aspects,and the specific contents are as follows:The mechanism of node matrix is used to improve and extend the key pre-distribution and management scheme.The node matrix is used for each node to directly store information that can directly communicate by single-hops,and is dynamically updated by network system status,node legality,and status.The node matrix also participates in identity authentication between nodes,reducing the storage and computational consumption of nodes,and ensuring the security of communication.The non-interactive zero-knowledge proof authentication mechanism and chebyshev polynomials of the first class are used to implement key management and identity authentication between nodes of different resource levels.The difficulty assumptions have improved the security of the entire network.In the clustered network,the network is dynamically divided by voronoi diagram,and key generation and identity authentication schemes of intra-cluster and inter-cluster node communication are proposed according to different cluster structures.The attribution of neighboring nodes and the selection strategy of cluster head nodes are also discussed. |
