[논문 세미나] HotStuff: BFT Consensus with Linearity and Responsiveness
Authors:
Yin, M., Malkhi, D., Reiter, M. K., Gueta, G. G., & Abraham, I.
Journal/Conference:
In Proceedings of the 2019 ACM Symposium on Principles of Distributed Computing (pp. 347-356).
Source:
https://dl.acm.org/doi/10.1145/3293611.3331591
Presentation material:
저자인 Dahila Malkhi 가 HotStuff-2 를 새롭게 제안했다. paper 는 작성중인 draft 만 발견할 수 있다. 이번 세미나 자료에는 hotstuff-2 에 대한 간략한 개념도 포함했다.
Abstract
We present HotStuff, a leader-based Byzantine fault-tolerant replication protocol for the partially synchronous model. Once network communication becomes synchronous, HotStuff enables a correct leader to drive the protocol to consensus at the pace of actual (vs. maximum) network delay--a property called responsiveness---and with communication complexity that is linear in the number of replicas. To our knowledge, HotStuff is the first partially synchronous BFT replication protocol exhibiting these combined properties. Its simplicity enables it to be further pipelined and simplified into a practical, concise protocol for building large-scale replication services.
Contributions
Propose new approach to solve liveness issue of view-change in 2-phase BFT. Adopt additional phase while providing following features:
- Linear view-change
: using threshold signature. - Optimistic Responsiveness
: do not need to wait until Δ
Review: 2-phase BFT
Review: view-change
PBFT & Tendermint
HotStuff
