Node trust management system in wireless sensor network

Abstract

The invention discloses a node trust management system in a wireless sensor network, in which a monitor dog module is connected with an environmental detection module and a state evaluation module, the environmental detection module is sequentially connected with the state evaluation module, a trust setup module and a malicious node judgment module, and a node operation monitor subsystem initiates the monitor dog module at the monitor stage during system operation in order to monitor and judge whether a variety of behaviors of adjacent nodes are malicious or normal. At the stage of trust evaluation, a trust evaluation subsystem is initiated, an operation monitor subsystem is suspended, and a new trustable node list and a new non-trustable node list are generated. Compared with the currenttrust management of wireless network for predicating node state based on node working ability, the sensor network node trust system having the framework and implementation mechanism based on node state evaluation can effectively identify malicious nodes and be free from the interference and influence from deployment environment.

Description

technical field [0001] The invention relates to a wireless sensor network, in particular to a node trust management system in a wireless sensor network. Background technique [0002] Wireless sensor network is a special Ad-hoc network composed of a large number of cheap and unreliable sensor nodes. It has a wide range of applications in military and civilian fields, such as battlefield surveillance, environmental monitoring and disaster relief. It is currently a very active Research areas. Sensor networks are often deployed in battlefield environments or environments where physical protection cannot be implemented, and nodes are easily captured. If the captured nodes are not identified in time, such nodes injected with malicious code will intentionally generate discarding, replaying, modifying and Malicious behavior such as forging data packets to achieve the purpose of disrupting the normal operation of the network and impairing the quality of service of the network. Trad...

AI Technical Summary

Problems solved by technology

However, when the network deployment environment is poor, most of the normal nodes have low trust value due to frequent packet loss, data packet forwarding failure and other reasons, and are excluded from the nodes participating in the task.

3) Short-lived noise interference attacks will cause network paralysis

Noise interference attacks will cause network nodes to fail to transmit and forward data packets. The direct impact is that the trust value of all nodes in the noise-affected area will drop. After the noise is eliminated, normal nodes will not be able to perform tasks for a long time, causing the network in the noise-affected area paralyzed state

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