Improved PBFT consensus method suitable for Internet of Vehicles environment

Abstract

The invention relates to an improved PBFT consensus method suitable for an Internet of Vehicles environment, and the method comprises the steps: dividing node identities into four types, and processing the node identities in combination with a node identity verification and change mechanism; adopting a node credit reward and punishment mechanism and selecting GMM clustering to divide the nodes into different levels, and giving node rights according to the levels; determining regional representative candidate nodes in combination with the number of different types of nodes in each region and the credit rating, performing voting of different weights according to node types to determine regional representative nodes, and selecting unselected nodes to form standby regional representative nodes; determining a multi-region or region internal consensus mechanism according to a transaction related range, wherein the region internal consensus mechanism randomly selects a main node from nodes with the highest credit rating in the region; according to the multi-region consensus mechanism, a plurality of region representative nodes form a main node group competition construction block, and a simplified consistency protocol is executed to achieve consensus. The method can tolerate a certain number of malicious node intrusion attacks, effectively reject malicious nodes and reduce transactiondelay.

Description

Technical field: [0001] The invention relates to the field of block chains, in particular to an improved PBFT consensus method suitable for the environment of the Internet of Vehicles. Background technique: [0002] At present, a new round of technological revolution and industrial transformation has flourished in the automotive industry, and vehicles with Internet of Vehicles (Intelligent Connected Vehicles, etc.) have become the strategic direction and inevitable trend of development. According to Boston Consulting Group estimates, from 2018, ICVs will usher in a rapid development period of about 20 years. By 2035, ICVs will account for about 25% of the global new car market, with annual sales exceeding 30 million. Vehicles, the industry scale is expected to be 294 billion to 539 billion yuan. [0003] Information security is one of the core technologies of the Internet of Vehicles, which plays a fundamental role in protecting intelligent networked vehicles, ensuring inte...

AI Technical Summary

Problems solved by technology

Although the above method uses methods such as partitioning and sharding to improve the scalability of the original mechanism to a certain extent, it does not take into account the problems of unreasonable setting of regional representatives or theft of node identities caused by a large number of mobile nodes in the network.

[0006] In order to solve the problem of poor flexibility of PBFT’s checkpoint protocol and view switching protocol, some scholars improved PBFT by modifying operating conditions and other methods: such as Huang Qiubo et al. improved the checkpoint protocol and view switching protocol, to a certain extent The ability of the original mechanism in terms of node storage and error handling has been improved, but it does not consider scalability issues, so it cannot be directly applied to the Internet of Vehicles environment with many nodes

[0007] In short, the current PBFT methods are too simple to divide the credit level, and the designated master node will become a new intrusion target, and the movement of the node is not considered, and some even ignore the checkpoint protocol and view. The problem of poor scalability in the switching protocol, the existing methods are difficult to directly apply to the Internet of Vehicles environment

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