Scrooge: Reducing the costs of fast Byzantine replication in presence of unresponsive replicas

Marco Serafini, Péter Bokor, Dan Dobre, Matthias Majuntke, Neeraj Suri

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

Byzantine-Fault-Tolerant (BFT) state machine replication is an appealing technique to tolerate arbitrary failures. However, Byzantine agreement incurs a fundamental trade-off between being fast (i.e. optimal latency) and achieving optimal resilience (i.e. 2f + b+ 1 replicas, where f is the bound on failures and b the bound on Byzantine failures [9]). Achieving fast Byzantine replication despite f failures requires at least f + b - 2 additional replicas [10, 6, 8]. In this paper we show, perhaps surprisingly, that fast Byzantine agreement despite f failures is practically attainable using only b - 1 additional replicas, which is independent of the number of crashes tolerated. This makes our approach particularly appealing for systems that must tolerate many crashes (large f) and few Byzantine faults (small b). The core principle of our approach is to have replicas agree on a quorum of responsive replicas before agreeing on requests. This is key to circumventing the resilience lower bound of fast Byzantine agreement [6].

Original languageEnglish
Title of host publicationProceedings of the International Conference on Dependable Systems and Networks
Pages353-362
Number of pages10
DOIs
Publication statusPublished - 20 Sep 2010
Externally publishedYes
Event2010 IEEE/IFIP International Conference on Dependable Systems and Networks, DSN 2010 - Chicago, IL, United States
Duration: 28 Jun 20101 Jul 2010

Other

Other2010 IEEE/IFIP International Conference on Dependable Systems and Networks, DSN 2010
CountryUnited States
CityChicago, IL
Period28/6/101/7/10

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Software

Cite this

Serafini, M., Bokor, P., Dobre, D., Majuntke, M., & Suri, N. (2010). Scrooge: Reducing the costs of fast Byzantine replication in presence of unresponsive replicas. In Proceedings of the International Conference on Dependable Systems and Networks (pp. 353-362). [5544295] https://doi.org/10.1109/DSN.2010.5544295