2026-08-06T08:11:20Z https://drops.dagstuhl.de/oai

oai:drops-oai.dagstuhl.de:19169 2024-03-06T11:03:36Z ddc:004 open_access

Brief Announcement: Let It TEE: Asynchronous Byzantine Atomic Broadcast with n ≥ 2f+1 Leinweber, Marc Hartenstein, Hannes Byzantine Fault Tolerance Trusted Execution Environments Asynchrony Asynchronous Byzantine Atomic Broadcast (ABAB) promises simplicity in implementation as well as increased performance and robustness in comparison to partially synchronous approaches. We adapt the recently proposed DAG-Rider approach to achieve ABAB with n ≥ 2f+1 processes, of which f are faulty, with only a constant increase in message size. We leverage a small Trusted Execution Environment (TEE) that provides a unique sequential identifier generator (USIG) to implement Reliable Broadcast with n > f processes and show that the quorum-critical proofs still hold when adapting the quorum size to ⌊ n/2 ⌋ + 1. This first USIG-based ABAB preserves the simplicity of DAG-Rider and serves as starting point for further research on TEE-based ABAB. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Marc Leinweber and Hannes Hartenstein 2023 Is Part Of LIPIcs, Volume 281, 37th International Symposium on Distributed Computing (DISC 2023) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/LIPIcs.DISC.2023.43 urn:nbn:de:0030-drops-191694 https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.DISC.2023.43 eng https://creativecommons.org/licenses/by/4.0/legalcode