Internet of vehicles trust management method based on double-layer block chain

Abstract

The invention discloses an Internet of Vehicles trust management method based on a double-layer block chain, which constructs a new trust voucher and evaluation system, and reflects the behavior trend of a subject through the behavior frequency and trust value acceleration change of the Internet of Vehicles subject, thereby effectively improving the ability of a trust index set to evaluate the reliability of the subject. A double-layer block chain structure is adopted, trust evaluation data and trust voucher data are stored at the same time, and the two types of data are mutually independent logically. Therefore, the trust evaluation system has the capability of accommodating dual-granularity data, and auditing performance and traceability of trust evaluation results are guaranteed. For node characteristics of a trust management system, an accounting right distribution algorithm based on a pseudo-random number is provided, the consensus efficiency can be effectively improved, and calculation power consumption caused by consensus can be avoided. According to the method, the accounting node sequence can be unpredictable, so that a collusion attack is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of the Internet of Vehicles, in particular to a trust management method for the Internet of Vehicles based on a double-layer blockchain. Background technique [0002] Due to the intelligence and mobility of the subject in the Internet of Vehicles, the attack behavior and methods are more complex and changeable, which poses a huge threat to the traditional security protection mechanism. Because of its dynamic adaptability, the trust management mechanism is expected to become a key technology to ensure the safe operation of the Internet of Vehicles, and it is an important research direction in the field of Internet of Vehicles in recent years. Existing technologies are mainly divided into two categories: Central trust management: usually includes a central node, and the relevant data of trust evaluation are aggregated to the central node for calculation and storage. Distributed trust management: It is a multi...

AI Technical Summary

Problems solved by technology

[0003] The existing technology has the following problems: (1) The trust evaluation index is single, unable to reflect the historical behavior of the main body of the Internet of Vehicles, and cannot comprehensively evaluate the reliability of the main body of the Internet of Vehicles

(2) The lack of detailed data makes the trust assessment results lack of auditability

(3) The computing power consumption in the consensus stage is relatively serious, and the consensus efficiency is low

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