Multi-factor-based dynamic trust evaluation system and method for wireless sensor network

Abstract

The invention discloses a multi-factor-based dynamic trust evaluation system and method for a wireless sensor network. The system is characterized by comprising a trust factor obtaining module (11), atrust measurement module (12), a trust calculation module (13) and a trust evaluation module (14). The method comprises the steps of: (1), obtaining various trust factors, which possibly influence anode trust value; (2), defining the measurement modes of the various trust factors; (3), realizing each trust calculation; and (4), judging whether a target node is trustable or not by comparing the comprehensive trust value of the target node obtained in a trust calculation process with a trust threshold value. Compared with the prior art, the multi-factor-based dynamic trust evaluation system and method for the wireless sensor network have the active advantages that: because a behaviour when a node transmits sensor data is comprehensively considered, the behaviour of the node can be monitored more comprehensively; the fact that an untrusted node in a network is effectively processed in time can be ensured; in addition, the trust value of the node is measured in a manner of integrating direct trust with indirect trust; and thus, the evaluation result deviation problem of the node is solved.

Description

technical field [0001] The invention belongs to the wireless communication network technology in the security field of the Internet of Things, and in particular relates to a multi-factor-based wireless sensor network dynamic trust evaluation system and method. Background technique [0002] With the popularization of Internet of Things applications, wireless sensor networks, as the most widely used underlying sensing devices of the Internet of Things, have been successfully applied to important fields such as environmental monitoring, space monitoring, space stations, military defense, smart homes, smart cities, and medical monitoring. At the same time, due to the limitation of the sensor node itself and the variability of the application environment, the security problems of wireless sensor networks are becoming more and more serious. [0003] The wireless sensor network is a dynamic network: network nodes can move anywhere; nodes may fail or even fail due to battery energy ...

AI Technical Summary

Problems solved by technology

Compared with external attacks, internal attacks are carried out by capturing the internal nodes of the network or cracking the key structure of the network. This attack method is more difficult to detect and poses a greater threat to the normal communication of the network.

[0004] The traditional encryption algorithm-based security mechanism can only solve the external attack whose identity has not been authenticated, but cannot solve the internal attack problem caused by the capture of the node.

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