BFT问责机制综述

Survey on Byzantine Fault Tolerance Accountability Mechanisms

拜占庭容错(Byzantine Fault Tolerance,BFT)协议在保障区块链或分布式系统在面临节点故障和恶意行为时的一致性和可靠性方面发挥着关键作用。BFT问责机制通过记录和共享共识过程中的共识节点行为,旨在识别拜占庭节点,并能够有效解决在拜占庭节点数量超过1/3时,传统的BFT协议无法确保安全性和活性的问题。文章系统地总结了目前已有的BFT问责协议,包括服务端问责机制、客户端问责机制和BFT内嵌问责机制。文章还对这些机制进行比较和分析,探讨了存在的挑战,并展望了未来可能的发展方向。

The Byzantine Fault Tolerance(BFT)protocol plays a crucial role in ensuring the consistency and reliability of blockchain or distributed systems in the face of node failures and malicious behavior.The BFT accountability mechanism aims to identify Byzantine nodes by recording and sharing the behavior of consensus nodes during the consensus process.It is designed to effectively address the security and liveness issues that traditional BFT protocols cannot guarantee when the number of Byzantine nodes exceeds 1/3.This paper systematically summarized existing BFT accountability protocols,including server-side accountability mechanisms,client-side accountability mechanisms,and embedded BFT accountability mechanisms.Through a comprehensive comparison and analysis of these involved mechanisms,this paper delved into the challenges and anticipated possible future directions.