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arXiv 2102.07932cs.DCcs.CR
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简要说明:快速验证拜占庭共识

Brief Note: Fast Authenticated Byzantine Consensus

Ittai Abraham, Kartik Nayak, Ling Ren, Zhuolun Xiang

摘要:

拜占庭容错(BFT)状态机复制(SMR)已经研究了30多年。最近,由于其在许可区块链系统中的应用,它受到了更多的关注。一系列研究工作集中于在常见良好情况下改进SMR协议的提交等待时间,包括具有$3$ -轮等待时间和$n\geq 3f+1$的PBFT以及具有$2$ -轮等待时间和$n\geq 5f+1$的Fab。在本文中,我们提出了一个认证协议,解决了$2$轮BFT SMR只有$n\geq 5f-1$副本,这驳斥了最佳弹性要求在Fab中的$2$轮PBFT风格的BFT协议需要$n \geq 5f+1$。对于$f=1$的特殊情况,我们的协议只需要$4$副本,并严格提高PBFT减少一轮的延迟(即使一个备份是错误的)。

英文摘要:

Byzantine fault-tolerant (BFT) state machine replication (SMR) has been studied for over 30 years. Recently it has received more attention due to its application in permissioned blockchain systems. A sequence of research efforts focuses on improving the commit latency of the SMR protocol in the common good case, including PBFT with $3$-round latency and $n\geq 3f+1$ and FaB with $2$-round latency and $n\geq 5f+1$. In this paper, we propose an authenticated protocol that solves $2$-round BFT SMR with only $n\geq 5f-1$ replicas, which refutes the optimal resiliency claim made in FaB for needing $n \geq 5f+1$ for $2$-round PBFT-style BFT protocols. For the special case when $f=1$, our protocol needs only $4$ replicas, and strictly improves PBFT by reducing the latency by one round (even when one backup is faulty).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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