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DOI: 10.4230/LIPIcs.DISC.2025.5

DAG It Off: Latency Prefers No Common Coins

Authors: Ignacio Amores-Sesar, Viktor Grøndal, Adam Holmgård, and Mads Ottendal

Published in: LIPIcs, Volume 356, 39th International Symposium on Distributed Computing (DISC 2025)

Abstract

We introduce Black Marlin, the first Directed Acyclic Graph (DAG)-based Byzantine atomic broadcast protocol in a partially synchronous setting that successfully forgoes the reliable broadcast and common coin primitives. Black Marlin achieves the optimal latency of 3 rounds of communication (4.25 with Byzantine faults) while maintaining optimal communication and amortized communication complexities. We present a formal security analysis of the protocol, accompanied by empirical evidence that Black Marlin outperforms state-of-the-art DAG-based protocols in both throughput and latency.

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Ignacio Amores-Sesar, Viktor Grøndal, Adam Holmgård, and Mads Ottendal. DAG It Off: Latency Prefers No Common Coins. In 39th International Symposium on Distributed Computing (DISC 2025). Leibniz International Proceedings in Informatics (LIPIcs), Volume 356, pp. 5:1-5:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{amoressesar_et_al:LIPIcs.DISC.2025.5,
  author =	{Amores-Sesar, Ignacio and Gr{\o}ndal, Viktor and Holmg\r{a}rd, Adam and Ottendal, Mads},
  title =	{{DAG It Off: Latency Prefers No Common Coins}},
  booktitle =	{39th International Symposium on Distributed Computing (DISC 2025)},
  pages =	{5:1--5:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-402-4},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{356},
  editor =	{Kowalski, Dariusz R.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.DISC.2025.5},
  URN =		{urn:nbn:de:0030-drops-248221},
  doi =		{10.4230/LIPIcs.DISC.2025.5},
  annote =	{Keywords: Atomic broadcast, DAG-based, Partial synchrony}
}

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DAG It Off: Latency Prefers No Common Coins

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