LIPIcs.DISC.2023.43.pdf
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Brief Announcement: Let It TEE: Asynchronous Byzantine Atomic Broadcast with n ≥ 2f+1
Authors
Marc Leinweber 
,
Hannes Hartenstein
-
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Volume:
37th International Symposium on Distributed Computing (DISC 2023)
Series: Leibniz International Proceedings in Informatics (LIPIcs)
Conference: International Symposium on Distributed Computing (DISC) - License:
Creative Commons Attribution 4.0 International license
- Publication Date: 2023-10-05
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Author Details
- Institute of Information Security and Dependability (KASTEL), Karlsruhe Institute of Technology (KIT), Germany
Cite As Get BibTex
Marc Leinweber and Hannes Hartenstein. Brief Announcement: Let It TEE: Asynchronous Byzantine Atomic Broadcast with n ≥ 2f+1. In 37th International Symposium on Distributed Computing (DISC 2023). Leibniz International Proceedings in Informatics (LIPIcs), Volume 281, pp. 43:1-43:7, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)
https://doi.org/10.4230/LIPIcs.DISC.2023.43
Abstract
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.
Subject Classification
ACM Subject Classification
- Security and privacy → Distributed systems security
Keywords
- Byzantine Fault Tolerance
- Trusted Execution Environments
- Asynchrony
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References
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