A Cluster Key Management Method for Wireless Sensor Networks

Abstract

The present invention is a cluster key management method that can be used in wireless sensor networks. The method does not consider the specific division method of clusters. The nodes are initialized by the key management center before deployment, including the relevant information for each sensor node. The setting of parameters and algorithms; after the whole wireless sensor network is clustered, it is divided into base station, cluster head and intra-cluster nodes; the base station and cluster head use a compound matrix key to ensure the security of communication and data transmission between the two, and the cluster The head and the nodes in the cluster form an internal secure communication area; the cluster head is responsible for the safe data transmission of the nodes in the cluster. When the remaining energy of the cluster head node is lower than the set threshold, it will give up the condition of becoming a cluster head and turn into a normal node. When the remaining energy of the node is lower than a certain threshold, the algorithm and parameters in the chip will be self-destructed. The invention does not need key authentication controlled by KMC, reduces calculation and communication costs, and adopts two-way authentication between clusters.

Description

technical field [0001] The invention relates to a cluster secret key management method based on the combination of a composite public key matrix and a threshold secret key in a cluster wireless sensor network, and belongs to the cross-technical application fields of information security, computer network and distributed computing. Background technique [0002] A wireless sensor network consists of a large number of self-organizing, battery-operated sensors scattered throughout the work area. These sensors are embedded with various models, including data processing models, energy models, storage models, communication models, etc. These sensors can be used to monitor physical or environmental conditions in the network coverage area, such as temperature, sound, vibration pressure, motion or pollutants, etc., and transmit the data through network cooperation. In recent years, wireless sensor networks have been widely used in various fields and environments, such as military app...

AI Technical Summary

Problems solved by technology

The disadvantage of the algorithm is that the time must be highly synchronized and the storage redundancy caused by the delay of key release is relatively large; another multi-μTESLA method introduces the concept of a multi-level key ring, but the algorithm cannot lose packets; the MMμTESLA algorithm uses The concept of threshold encryption decomposes the authentication key into key slices and distributes them to multiple base stations. Sensor nodes use key slices to reorganize the authentication keys and broadcast them, but the number of base stations has become a new security issue

Another improved key management method is to use a one-way function to reduce the number of affected sensors without affecting the connection between adjacent sensor nodes, but this method still cannot resist and solve DoS attacks against ordinary nodes, and Derived Key Collision Problem

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