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Documents authored by Rivière, Etienne

Document
DOI: 10.4230/LIPIcs.OPODIS.2025.27
Where to Place Your TEE? In Search of a Censorship-Resilient Design for Rollup Sequencers

Authors: Andrei Arusoaie, Claudiu-Nicu Bărbieru, Oana-Otilia Captarencu, Pascal Felber, Corentin Libert, Emanuel Onica, Etienne Rivière, Valerio Schiavoni, and Peterson Yuhala

Published in: LIPIcs, Volume 361, 29th International Conference on Principles of Distributed Systems (OPODIS 2025)

Abstract
Ethereum is the dominant blockchain ecosystem capable of executing Turing-complete smart contracts. Rollups gained significant traction as the primary layer 2 (L2) solution meant to bring horizontal scalability to the main Ethereum network (L1). A core component of any rollup is the sequencer, which creates new L2 blocks to be submitted in rollup batches to L1. In most of the current rollup architectures, this component is centralised. As a result, these designs are prone to inconspicuous censorship practices by the sequencer. Trusted execution environments (TEEs) can guarantee the integrity of various sequencer components, which is instrumental in addressing censorship. However, the reaction of the system design to censorship attempts depends on where a TEE is integrated and which components it protects. In particular, this reaction is limited in the case of a monolithic TEE-protected sequencer design. Proposer-Builder Separation (PBS) is a non-monolithic paradigm adopted on L1, which separates the production of blocks from proposing them for inclusion in the blockchain. Recently, PBS has been considered for integration with L2 sequencers, with an impact on alleviating censorship. In this paper, we explore the design space of TEE-integrating PBS and non-PBS sequencer variants. First, we introduce a formal framework for the censorship actions that captures the specificity of the L2 sequencer. Then, we analyse to what extent the different designs address these censorship actions. Our main contribution is a novel design variation that allows for a precise observation of censored transactions. In the presence of TEEs, in a PBS setting, we demonstrate this precise observability, which is necessary to enable resilience to censorship.
Cite as

Andrei Arusoaie, Claudiu-Nicu Bărbieru, Oana-Otilia Captarencu, Pascal Felber, Corentin Libert, Emanuel Onica, Etienne Rivière, Valerio Schiavoni, and Peterson Yuhala. Where to Place Your TEE? In Search of a Censorship-Resilient Design for Rollup Sequencers. In 29th International Conference on Principles of Distributed Systems (OPODIS 2025). Leibniz International Proceedings in Informatics (LIPIcs), Volume 361, pp. 27:1-27:20, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{arusoaie_et_al:LIPIcs.OPODIS.2025.27,
  author =	{Arusoaie, Andrei and B\u{a}rbieru, Claudiu-Nicu and Captarencu, Oana-Otilia and Felber, Pascal and Libert, Corentin and Onica, Emanuel and Rivi\`{e}re, Etienne and Schiavoni, Valerio and Yuhala, Peterson},
  title =	{{Where to Place Your TEE? In Search of a Censorship-Resilient Design for Rollup Sequencers}},
  booktitle =	{29th International Conference on Principles of Distributed Systems (OPODIS 2025)},
  pages =	{27:1--27:20},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-409-3},
  ISSN =	{1868-8969},
  year =	{2026},
  volume =	{361},
  editor =	{Arusoaie, Andrei and Onica, Emanuel and Spear, Michael and Tucci-Piergiovanni, Sara},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2025.27},
  URN =		{urn:nbn:de:0030-drops-252000},
  doi =		{10.4230/LIPIcs.OPODIS.2025.27},
  annote =	{Keywords: Rollups, Trusted Execution Environments, Censorship}
}
Document
Complete Volume
DOI: 10.4230/LIPIcs.OPODIS.2024
LIPIcs, Volume 324, OPODIS 2024, Complete Volume

Authors: Silvia Bonomi, Letterio Galletta, Etienne Rivière, and Valerio Schiavoni

Published in: LIPIcs, Volume 324, 28th International Conference on Principles of Distributed Systems (OPODIS 2024)

Abstract
LIPIcs, Volume 324, OPODIS 2024, Complete Volume
Cite as

28th International Conference on Principles of Distributed Systems (OPODIS 2024). Leibniz International Proceedings in Informatics (LIPIcs), Volume 324, pp. 1-772, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@Proceedings{bonomi_et_al:LIPIcs.OPODIS.2024,
  title =	{{LIPIcs, Volume 324, OPODIS 2024, Complete Volume}},
  booktitle =	{28th International Conference on Principles of Distributed Systems (OPODIS 2024)},
  pages =	{1--772},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-360-7},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{324},
  editor =	{Bonomi, Silvia and Galletta, Letterio and Rivi\`{e}re, Etienne and Schiavoni, Valerio},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2024},
  URN =		{urn:nbn:de:0030-drops-227373},
  doi =		{10.4230/LIPIcs.OPODIS.2024},
  annote =	{Keywords: LIPIcs, Volume 324, OPODIS 2024, Complete Volume}
}
Document
Front Matter
DOI: 10.4230/LIPIcs.OPODIS.2024.0
Front Matter, Table of Contents, Preface, Conference Organization

Authors: Silvia Bonomi, Letterio Galletta, Etienne Rivière, and Valerio Schiavoni

Published in: LIPIcs, Volume 324, 28th International Conference on Principles of Distributed Systems (OPODIS 2024)

Abstract
Front Matter, Table of Contents, Preface, Conference Organization
Cite as

28th International Conference on Principles of Distributed Systems (OPODIS 2024). Leibniz International Proceedings in Informatics (LIPIcs), Volume 324, pp. 0:i-0:xvi, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024)

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@InProceedings{bonomi_et_al:LIPIcs.OPODIS.2024.0,
  author =	{Bonomi, Silvia and Galletta, Letterio and Rivi\`{e}re, Etienne and Schiavoni, Valerio},
  title =	{{Front Matter, Table of Contents, Preface, Conference Organization}},
  booktitle =	{28th International Conference on Principles of Distributed Systems (OPODIS 2024)},
  pages =	{0:i--0:xvi},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-360-7},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{324},
  editor =	{Bonomi, Silvia and Galletta, Letterio and Rivi\`{e}re, Etienne and Schiavoni, Valerio},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2024.0},
  URN =		{urn:nbn:de:0030-drops-227360},
  doi =		{10.4230/LIPIcs.OPODIS.2024.0},
  annote =	{Keywords: Front Matter, Table of Contents, Preface, Conference Organization}
}
Document
Complete Volume
DOI: 10.4230/LIPIcs.OPODIS.2022
LIPIcs, Volume 253, OPODIS 2022, Complete Volume

Authors: Eshcar Hillel, Roberto Palmieri, and Etienne Rivière

Published in: LIPIcs, Volume 253, 26th International Conference on Principles of Distributed Systems (OPODIS 2022)

Abstract
LIPIcs, Volume 253, OPODIS 2022, Complete Volume
Cite as

26th International Conference on Principles of Distributed Systems (OPODIS 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 253, pp. 1-536, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@Proceedings{hillel_et_al:LIPIcs.OPODIS.2022,
  title =	{{LIPIcs, Volume 253, OPODIS 2022, Complete Volume}},
  booktitle =	{26th International Conference on Principles of Distributed Systems (OPODIS 2022)},
  pages =	{1--536},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-265-5},
  ISSN =	{1868-8969},
  year =	{2023},
  volume =	{253},
  editor =	{Hillel, Eshcar and Palmieri, Roberto and Rivi\`{e}re, Etienne},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2022},
  URN =		{urn:nbn:de:0030-drops-176190},
  doi =		{10.4230/LIPIcs.OPODIS.2022},
  annote =	{Keywords: LIPIcs, Volume 253, OPODIS 2022, Complete Volume}
}
Document
Front Matter
DOI: 10.4230/LIPIcs.OPODIS.2022.0
Front Matter, Table of Contents, Preface, Conference Organization

Authors: Eshcar Hillel, Roberto Palmieri, and Etienne Rivière

Published in: LIPIcs, Volume 253, 26th International Conference on Principles of Distributed Systems (OPODIS 2022)

Abstract
Front Matter, Table of Contents, Preface, Conference Organization
Cite as

26th International Conference on Principles of Distributed Systems (OPODIS 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 253, pp. 0:i-0:xiv, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{hillel_et_al:LIPIcs.OPODIS.2022.0,
  author =	{Hillel, Eshcar and Palmieri, Roberto and Rivi\`{e}re, Etienne},
  title =	{{Front Matter, Table of Contents, Preface, Conference Organization}},
  booktitle =	{26th International Conference on Principles of Distributed Systems (OPODIS 2022)},
  pages =	{0:i--0:xiv},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-265-5},
  ISSN =	{1868-8969},
  year =	{2023},
  volume =	{253},
  editor =	{Hillel, Eshcar and Palmieri, Roberto and Rivi\`{e}re, Etienne},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2022.0},
  URN =		{urn:nbn:de:0030-drops-176203},
  doi =		{10.4230/LIPIcs.OPODIS.2022.0},
  annote =	{Keywords: Front Matter, Table of Contents, Preface, Conference Organization}
}
Document
DOI: 10.4230/LIPIcs.OPODIS.2019.9
Split and Migrate: Resource-Driven Placement and Discovery of Microservices at the Edge

Authors: Genc Tato, Marin Bertier, Etienne Rivière, and Cédric Tedeschi

Published in: LIPIcs, Volume 153, 23rd International Conference on Principles of Distributed Systems (OPODIS 2019)

Abstract
Microservices architectures combine the use of fine-grained and independently-scalable services with lightweight communication protocols, such as REST calls over HTTP. Microservices bring flexibility to the development and deployment of application back-ends in the cloud. Applications such as collaborative editing tools require frequent interactions between the front-end running on users' machines and a back-end formed of multiple microservices. User-perceived latencies depend on their connection to microservices, but also on the interaction patterns between these services and their databases. Placing services at the edge of the network, closer to the users, is necessary to reduce user-perceived latencies. It is however difficult to decide on the placement of complete stateful microservices at one specific core or edge location without trading between a latency reduction for some users and a latency increase for the others. We present how to dynamically deploy microservices on a combination of core and edge resources to systematically reduce user-perceived latencies. Our approach enables the split of stateful microservices, and the placement of the resulting splits on appropriate core and edge sites. Koala, a decentralized and resource-driven service discovery middleware, enables REST calls to reach and use the appropriate split, with only minimal changes to a legacy microservices application. Locality awareness using network coordinates further enables to automatically migrate services split and follow the location of the users. We confirm the effectiveness of our approach with a full prototype and an application to ShareLatex, a microservices-based collaborative editing application.
Cite as

Genc Tato, Marin Bertier, Etienne Rivière, and Cédric Tedeschi. Split and Migrate: Resource-Driven Placement and Discovery of Microservices at the Edge. In 23rd International Conference on Principles of Distributed Systems (OPODIS 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 153, pp. 9:1-9:16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)

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@InProceedings{tato_et_al:LIPIcs.OPODIS.2019.9,
  author =	{Tato, Genc and Bertier, Marin and Rivi\`{e}re, Etienne and Tedeschi, C\'{e}dric},
  title =	{{Split and Migrate: Resource-Driven Placement and Discovery of Microservices at the Edge}},
  booktitle =	{23rd International Conference on Principles of Distributed Systems (OPODIS 2019)},
  pages =	{9:1--9:16},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-133-7},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{153},
  editor =	{Felber, Pascal and Friedman, Roy and Gilbert, Seth and Miller, Avery},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2019.9},
  URN =		{urn:nbn:de:0030-drops-117954},
  doi =		{10.4230/LIPIcs.OPODIS.2019.9},
  annote =	{Keywords: Distributed applications, Microservices, State management, Edge computing}
}
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