Hierarchical trust model for Internet of Vehicles, and trust value calculation method thereof

Abstract

The invention discloses a hierarchical trust model for an Internet of Vehicles, and a trust value calculation method of the hierarchical trust model. The hierarchical trust model for the Internet of Vehicles comprises a first-layer trust model, a second-layer trust model, a third-layer trust model and a fourth-layer trust model, wherein RSUs do not exist in the first-layer trust model and exchanged information is delay-sensitive; RSUs exist in the second-layer trust model and exchanged information is partially delay-tolerant; and RSU exists in the third-layer trust model and the exchanged information is delay-tolerant. The trust value calculation method of the hierarchical trust model comprises that: the trust value calculation method of the first-layer trust model comprises direct trust value calculation and inter-vehicle recommended trust value calculation; the trust value calculation method of the second-layer trust model comprises direct trust value calculation and RSU recommendedtrust value calculation; and the trust value calculation method of the third-layer trust model comprises authoritative institution recommended trust value calculation. According to the hierarchical trust model for the Internet of Vehicles and the trust value calculation method of the hierarchical trust model, the problems in different application scenes are solved according to different communication scenes, and wrong relay decisions are reduced.

Description

technical field [0001] The invention relates to the technical field of Internet of Vehicles security, in particular to a hierarchical trust model for Internet of Vehicles and a trust value calculation method thereof. Background technique [0002] As the number of cars continues to increase, traffic accidents become more frequent. Intelligent Transportation System (ITS), as a key technology to improve traffic infrastructure utilization, relieve traffic pressure, and reduce traffic accident rates, has become a key technology in urban traffic. inevitable trend of development. The Internet of Vehicles (IoV), as the next technology highlight of ITS, has attracted the attention of many researchers. Its goal is to improve the security and information service level of data transmission between vehicles. [0003] The Internet of Vehicles realizes traffic intelligent management, decision-making and control through people-vehicle-road, and its trust management is a hot and difficult i...

AI Technical Summary

Problems solved by technology

Generally, the trust value is given by direct trust and recommended trust. The larger the recommendation set, the more accurate the trust value and the higher the quality of service, but it adds extra overhead and cannot meet certain security requirements.

[0004] In the multi-hop communication process of the Internet of Vehicles, vehicles are vulnerable to malicious node attacks, and it is difficult to achieve a balance between security requirements and service quality. The current trust model does not deal with different security levels in different application scenarios according to different communication scenarios. This makes the network There are more attackers in , resulting in many wrong relay decisions

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