Wireless sensor network switching and pre-authenticating method based on evaluation

Abstract

The invention discloses a wireless sensor network switching and pre-authenticating method based on evaluation, comprising the steps of: 1, predicting a new subnet to be switched by a mobile node, evaluating and predicting the mobile node, and making a pre-authenticating request; 2, evaluating the mobile node by the original subnet cluster head node, if the evaluation is safe, sending pre-authenticating information to a new subnet cluster head node; 3, evaluating the new subnet by the new subnet cluster head node, and authenticating the identity of the mobile node, if the evaluation is qualified, passing the authentication, agreeing to access, and sending evaluation information to the original subnet cluster head node; 4, deciding whether agreeing to access or not by the original subnet cluster head node according to the request of the mobile node and the evaluation on the new subnet, giving an adjustment suggest; and 5, if agreeing to access, negotiating a private key between the mobile node and the new subnet cluster head node. The invention has the advantages of short time delay, high safety and long service life of a sensor network, and can be applied to the field of sensor networks with high requirements for time delay and safety.

Description

technical field [0001] The invention belongs to the technical field of network communication, and relates to a mobile node authentication technology under a clustering model of a wireless sensor network, specifically an evaluation-based handover pre-authentication method for a wireless sensor network, which is mainly applied to a method with relatively high requirements for time delay, energy consumption, and security. High field of wireless sensor networks. Background technique [0002] The wireless sensor network is composed of a large number of cheap micro sensor nodes deployed in the monitoring area. It is a multi-hop self-organizing network system formed by wireless communication. Its purpose is to cooperatively perceive and collect some specific The physical quantity, and the collected information is processed, and then sent to the observer. Due to the large number, sensor nodes are usually placed randomly in the monitoring area, and it is difficult to replace the pow...

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Problems solved by technology

[0003] In traditional wireless sensor network applications, nodes are generally static and randomly arranged, which may cause some problems: 1) Some nodes in the sensor network are randomly distributed and loose, which is difficult to network, and some isolated nodes collect 2) Some "bottleneck" nodes will also appear in the network, such as sensor networks distributed in a tree, the closer to the cluster head node, that is, the more sensor nodes of the sink node will forward, and the energy consumption will be lower. The more; there are also some "key" nodes distributed in the network, with more forwarding and higher energy consumption

[0007] 1) Since the new subnet is only authenticated after the mobile node is switched and accessed, there will be a large amount of authentication delay, w

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