Abstract

blockchain technology is one of the strategic emerging information technologies. It integrates a variety of technologies such as cryptography, peer-to-peer network, consensus algorithm and smart contract, and has been gradually applied in various fields. The contradiction between the rapid development of blockchain industry and the incompleteness of evaluation system and technical means has become increasingly prominent. The vulnerability of blockchain system is an important part of blockchain evaluation system. It is of great significance for the development of blockchain technology and large-scale application to fully study the vulnerability of blockchain system and conduct quantitative evaluation or real-time monitoring. This paper systematically analyzes the vulnerability of blockchain, and puts forward the technical indicators to evaluate the vulnerability of blockchain. Based on the vulnerability technical index of blockchain consensus algorithm and industrial blockchain consensus algorithm PBFT, a consensus algorithm confrontation deduction model is designed, and the vulnerability index of blockchain system using PBFT is experimentally simulated and evaluated.

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