Damysus: streamlined BFT consensus leveraging trusted components

Jérémie Decouchant, David Kozhaya, Vincent Rahli, Jiangshan Yu

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

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Recently, streamlined Byzantine Fault Tolerant (BFT) consensus protocols, such as HotStuff, have been proposed as a means to circumvent the inefficient view-changes of traditional BFT protocols, such as PBFT. Several works have detailed trusted components, and BFT protocols that leverage them to tolerate a minority of faulty nodes and use a reduced number of communication rounds. Inspired by these works we identify two basic trusted services, respectively called the Checker and Accumulator services, which can be leveraged by streamlined protocols. Based on these services, we design Damysus, a streamlined protocol that improves upon HotStuff's resilience and uses less communication rounds. In addition, we show how the Checker and Accumulator services can be adapted to develop Chained-Damysus, a chained version of Damysus where operations are pipelined for efficiency. We prove the correctness of Damysus and Chained-Damysus, and evaluate their performance showcasing their superiority compared to previous protocols.
Original languageEnglish
Title of host publicationEuroSys 2022 - Proceedings of the 17th European Conference on Computer Systems
Subtitle of host publicationProceedings of the Seventeenth European Conference on Computer Systems
PublisherAssociation for Computing Machinery (ACM)
Number of pages16
ISBN (Print)9781459391627
Publication statusPublished - 28 Mar 2022
EventEuroSys '22: Seventeenth European Conference on Computer Systems - Rennes, France
Duration: 5 Apr 20228 Apr 2022


ConferenceEuroSys '22

Bibliographical note

Funding Information:
Jiangshan Yu was partially supported by the Australian Research Council (ARC) under project DE210100019.

Publisher Copyright:
© 2022 Owner/Author.


  • Consensus
  • Fault tolerance
  • Trusted component

ASJC Scopus subject areas

  • Hardware and Architecture
  • Control and Systems Engineering


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