Wireless sensor network key management method

Abstract

The invention discloses a wireless sensor network key management method. The method comprises the steps that a base station distributes public and private key pairs to all sensor nodes according to set parameters, cluster head nodes are elected from all the sensor nodes, the elected cluster head nodes send information to the surrounding sensor nodes, the surrounding sensor nodes select the cluster head nodes of their own according to the information so that clusters can be formed, the base station generates a self-balancing binary search tree (AVL tree) of the in-cluster sensor nodes for all the clusters to generate the in-cluster sensor nodes, and the in-cluster sensor nodes inquire the information of the other sensor nodes according to the AVL tree, exchange information, mutually authenticate the legality of the public keys, and share the session keys after the authenticating is successful. According to the method, the AVL tree mode is utilized for storing the public keys and the identity information, the searching time is shortened, and the consumption is reduced; an elliptical curve password system is utilized for achieving key distribution and management, the higher safety of the network can be ensured, and the calculation expenditure can be reduced to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of network security, in particular to a wireless sensor network key management method. Background technique [0002] A wireless sensor network is composed of a large number of sensor nodes deployed in a certain area. It forms a multi-hop self-organizing network system through wireless communication. It is generally deployed in an unattended environment, or even an enemy area. Due to the openness of wireless sensor networks, the communication between nodes is vulnerable to eavesdropping, tampering or replay, and the nodes themselves are vulnerable to attacks such as capture, copying or forgery, so ensuring network security has become one of the research focuses of wireless sensor networks. Key management is the basis of wireless sensor network security. Due to the limited computing power and storage capacity of each sensor node, dynamic changes in network topology, and insufficient communication bandwidth, s...

AI Technical Summary

Problems solved by technology

Due to the limited computing power and storage capacity of each sensor node, dynamic changes in network topology, and insufficient communication bandwidth, some existing standardized key management schemes, such as the Diffie-Hellman key exchange protocol, based on the key distribution center KDC solutions, public key infrastructure PKI, etc. cannot be directly applied to wireless sensor networks

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