Method for key management and node authentication of sensor network

Abstract

The invention relates to a method for key management and node authentication of a sensor network. The method comprises the following steps: 1) key pre-distribution, wherein a deployment server is used for establishing communication keys for the secure connection between nodes and distributing the communication keys to all the nodes before network deployment; 2) key establishment, wherein key pairs for the secure connection are established between nodes after the network deployment; and the step of key establishment further comprises the following steps: 2.1) the establishment of shared keys, wherein key pairs are established between adjacent nodes having the shared keys; and 2.2) the establishment of path keys, wherein key pairs are established between nodes having no shared keys but multi-hop secure connection; and 3) the authentication of node identities, wherein the identity authentication is carried out before the formal communication between nodes, so as to confirm the validity and effectiveness of the identity of the other party. The invention is capable of effectively resisting the attack on network communication, such as eavesdropping, tampering and resetting, achieving the secure communication between nodes, effectively saving the node resources of the sensor network and prolonging the service life of the sensor network.

Description

technical field [0001] The invention belongs to the technical field of network security, and in particular relates to a sensor network key management and node identification method. Background technique [0002] The sensor network is composed of a large number of small, cheap, battery-powered sensor nodes with wireless communication and monitoring capabilities. These nodes are densely deployed in the monitoring area to achieve the purpose of monitoring the physical world. Wireless sensor network is a new research direction in information technology, and has broad application prospects in environmental monitoring, military affairs, homeland security, traffic control, community security, forest fire prevention, and target positioning. [0003] Since sensor networks are usually deployed in unattended or even enemy areas, the communication between nodes is vulnerable to eavesdropping, tampering or replay, and the nodes themselves are vulnerable to attacks such as capture, repli...

AI Technical Summary

Problems solved by technology

When the network adopts the existing random key pre-distribution method, the generated key cannot provide end-to-end authentication services for network nodes. In this case, it can only verify the legitimacy of the other party, but cannot confirm the specific identity of the other party. , the sensor network cannot resist attacks against nodes such as capture, copy or forgery, resulting in a great security risk in the network

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