5 Search Results for "Pignolet, Yvonne Anne"


Document
Permissionless and Asynchronous Asset Transfer

Authors: Petr Kuznetsov, Yvonne-Anne Pignolet, Pavel Ponomarev, and Andrei Tonkikh

Published in: LIPIcs, Volume 209, 35th International Symposium on Distributed Computing (DISC 2021)


Abstract
Most modern asset transfer systems use consensus to maintain a totally ordered chain of transactions. It was recently shown that consensus is not always necessary for implementing asset transfer. More efficient, asynchronous solutions can be built using reliable broadcast instead of consensus. This approach has been originally used in the closed (permissioned) setting. In this paper, we extend it to the open (permissionless) environment. We present {Pastro}, a permissionless and asynchronous asset-transfer implementation, in which quorum systems, traditionally used in reliable broadcast, are replaced with a weighted Proof-of-Stake mechanism. {Pastro} tolerates a dynamic adversary that is able to adaptively corrupt participants based on the assets owned by them.

Cite as

Petr Kuznetsov, Yvonne-Anne Pignolet, Pavel Ponomarev, and Andrei Tonkikh. Permissionless and Asynchronous Asset Transfer. In 35th International Symposium on Distributed Computing (DISC 2021). Leibniz International Proceedings in Informatics (LIPIcs), Volume 209, pp. 28:1-28:19, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)


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@InProceedings{kuznetsov_et_al:LIPIcs.DISC.2021.28,
  author =	{Kuznetsov, Petr and Pignolet, Yvonne-Anne and Ponomarev, Pavel and Tonkikh, Andrei},
  title =	{{Permissionless and Asynchronous Asset Transfer}},
  booktitle =	{35th International Symposium on Distributed Computing (DISC 2021)},
  pages =	{28:1--28:19},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-210-5},
  ISSN =	{1868-8969},
  year =	{2021},
  volume =	{209},
  editor =	{Gilbert, Seth},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.DISC.2021.28},
  URN =		{urn:nbn:de:0030-drops-148307},
  doi =		{10.4230/LIPIcs.DISC.2021.28},
  annote =	{Keywords: Asset transfer, permissionless, asynchronous, dynamic adversary}
}
Document
Dynamic Byzantine Reliable Broadcast

Authors: Rachid Guerraoui, Jovan Komatovic, Petr Kuznetsov, Yvonne-Anne Pignolet, Dragos-Adrian Seredinschi, and Andrei Tonkikh

Published in: LIPIcs, Volume 184, 24th International Conference on Principles of Distributed Systems (OPODIS 2020)


Abstract
Reliable broadcast is a communication primitive guaranteeing, intuitively, that all processes in a distributed system deliver the same set of messages. The reason why this primitive is appealing is twofold: (i) we can implement it deterministically in a completely asynchronous environment, unlike stronger primitives like consensus and total-order broadcast, and yet (ii) reliable broadcast is powerful enough to implement important applications like payment systems. The problem we tackle in this paper is that of dynamic reliable broadcast, i.e., enabling processes to join or leave the system. This property is desirable for long-lived applications (aiming to be highly available), yet has been precluded in previous asynchronous reliable broadcast protocols. We study this property in a general adversarial (i.e., Byzantine) environment. We introduce the first specification of a dynamic Byzantine reliable broadcast (dbrb) primitive that is amenable to an asynchronous implementation. We then present an algorithm implementing this specification in an asynchronous network. Our dbrb algorithm ensures that if any correct process in the system broadcasts a message, then every correct process delivers that message unless it leaves the system. Moreover, if a correct process delivers a message, then every correct process that has not expressed its will to leave the system delivers that message. We assume that more than 2/3 of processes in the system are correct at all times, which is tight in our context. We also show that if only one process in the system can fail - and it can fail only by crashing - then it is impossible to implement a stronger primitive, ensuring that if any correct process in the system broadcasts or delivers a message, then every correct process in the system delivers that message - including those that leave.

Cite as

Rachid Guerraoui, Jovan Komatovic, Petr Kuznetsov, Yvonne-Anne Pignolet, Dragos-Adrian Seredinschi, and Andrei Tonkikh. Dynamic Byzantine Reliable Broadcast. In 24th International Conference on Principles of Distributed Systems (OPODIS 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 184, pp. 23:1-23:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)


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@InProceedings{guerraoui_et_al:LIPIcs.OPODIS.2020.23,
  author =	{Guerraoui, Rachid and Komatovic, Jovan and Kuznetsov, Petr and Pignolet, Yvonne-Anne and Seredinschi, Dragos-Adrian and Tonkikh, Andrei},
  title =	{{Dynamic Byzantine Reliable Broadcast}},
  booktitle =	{24th International Conference on Principles of Distributed Systems (OPODIS 2020)},
  pages =	{23:1--23:18},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-176-4},
  ISSN =	{1868-8969},
  year =	{2021},
  volume =	{184},
  editor =	{Bramas, Quentin and Oshman, Rotem and Romano, Paolo},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2020.23},
  URN =		{urn:nbn:de:0030-drops-135087},
  doi =		{10.4230/LIPIcs.OPODIS.2020.23},
  annote =	{Keywords: Byzantine reliable broadcast, deterministic distributed algorithms, dynamic distributed systems}
}
Document
Brief Announcement
Brief Announcement: What Can(Not) Be Perfectly Rerouted Locally

Authors: Klaus-Tycho Foerster, Juho Hirvonen, Yvonne-Anne Pignolet, Stefan Schmid, and Gilles Tredan

Published in: LIPIcs, Volume 179, 34th International Symposium on Distributed Computing (DISC 2020)


Abstract
In order to provide a high resilience and to react quickly to link failures, modern computer networks support fully decentralized flow rerouting, also known as local fast failover. In a nutshell, the task of a local fast failover algorithm is to pre-define fast failover rules for each node using locally available information only. Ideally, such a local fast failover algorithm provides a perfect resilience deterministically: a packet emitted from any source can reach any target, as long as the underlying network remains connected. Feigenbaum et al. showed [Feigenbaum and others, 2012] that it is not always possible to provide perfect resilience; on the positive side, the authors also presented an efficient algorithm which achieves at least 1-resilience, tolerating a single failure in any network. Interestingly, not much more is known currently about the feasibility of perfect resilience. This brief announcement revisits perfect resilience with local fast failover, both in a model where the source can and cannot be used for forwarding decisions. By establishing a connection between graph minors and resilience, we prove that it is impossible to achieve perfect resilience on any non-planar graph; On the positive side, we can derive perfect resilience for outerplanar and some planar graphs.

Cite as

Klaus-Tycho Foerster, Juho Hirvonen, Yvonne-Anne Pignolet, Stefan Schmid, and Gilles Tredan. Brief Announcement: What Can(Not) Be Perfectly Rerouted Locally. In 34th International Symposium on Distributed Computing (DISC 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 179, pp. 46:1-46:3, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)


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@InProceedings{foerster_et_al:LIPIcs.DISC.2020.46,
  author =	{Foerster, Klaus-Tycho and Hirvonen, Juho and Pignolet, Yvonne-Anne and Schmid, Stefan and Tredan, Gilles},
  title =	{{Brief Announcement: What Can(Not) Be Perfectly Rerouted Locally}},
  booktitle =	{34th International Symposium on Distributed Computing (DISC 2020)},
  pages =	{46:1--46:3},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-168-9},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{179},
  editor =	{Attiya, Hagit},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.DISC.2020.46},
  URN =		{urn:nbn:de:0030-drops-131244},
  doi =		{10.4230/LIPIcs.DISC.2020.46},
  annote =	{Keywords: Resilience, Local Failover}
}
Document
You Only Live Multiple Times: A Blackbox Solution for Reusing Crash-Stop Algorithms In Realistic Crash-Recovery Settings

Authors: David Kozhaya, Ognjen Maric, and Yvonne-Anne Pignolet

Published in: LIPIcs, Volume 125, 22nd International Conference on Principles of Distributed Systems (OPODIS 2018)


Abstract
Distributed agreement-based algorithms are often specified in a crash-stop asynchronous model augmented by Chandra and Toueg's unreliable failure detectors. In such models, correct nodes stay up forever, incorrect nodes eventually crash and remain down forever, and failure detectors behave correctly forever eventually, However, in reality, nodes as well as communication links both crash and recover without deterministic guarantees to remain in some state forever. In this paper, we capture this realistic temporary and probabilitic behaviour in a simple new system model. Moreover, we identify a large algorithm class for which we devise a property-preserving transformation. Using this transformation, many algorithms written for the asynchronous crash-stop model run correctly and unchanged in real systems.

Cite as

David Kozhaya, Ognjen Maric, and Yvonne-Anne Pignolet. You Only Live Multiple Times: A Blackbox Solution for Reusing Crash-Stop Algorithms In Realistic Crash-Recovery Settings. In 22nd International Conference on Principles of Distributed Systems (OPODIS 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 125, pp. 19:1-19:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)


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@InProceedings{kozhaya_et_al:LIPIcs.OPODIS.2018.19,
  author =	{Kozhaya, David and Maric, Ognjen and Pignolet, Yvonne-Anne},
  title =	{{You Only Live Multiple Times: A Blackbox Solution for Reusing Crash-Stop Algorithms In Realistic Crash-Recovery Settings}},
  booktitle =	{22nd International Conference on Principles of Distributed Systems (OPODIS 2018)},
  pages =	{19:1--19:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-098-9},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{125},
  editor =	{Cao, Jiannong and Ellen, Faith and Rodrigues, Luis and Ferreira, Bernardo},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2018.19},
  URN =		{urn:nbn:de:0030-drops-100792},
  doi =		{10.4230/LIPIcs.OPODIS.2018.19},
  annote =	{Keywords: Crash recovery, consensus, asynchrony}
}
Document
Algorithms for Wireless Communication (Dagstuhl Seminar 14051)

Authors: Guy Even, Magnus Halldorson, Yvonne Anne Pignolet, and Christian Scheideler

Published in: Dagstuhl Reports, Volume 4, Issue 1 (2014)


Abstract
This report documents the talks and discussions of Dagstuhl Seminar 14051 "Algorithms for Wireless Communication". The presented talks represent a wide spectrum of work on wireless networks. The topic of wireless communication continues to grow in many domains, new applications and deployments of wireless networks in a variety of contexts are being reported. A key focus of the talks and discussions presented here is to discuss models for wireless networks as well as algorithmic results and real world deployments.

Cite as

Guy Even, Magnus Halldorson, Yvonne Anne Pignolet, and Christian Scheideler. Algorithms for Wireless Communication (Dagstuhl Seminar 14051). In Dagstuhl Reports, Volume 4, Issue 1, pp. 152-169, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2014)


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@Article{even_et_al:DagRep.4.1.152,
  author =	{Even, Guy and Halldorson, Magnus and Pignolet, Yvonne Anne and Scheideler, Christian},
  title =	{{Algorithms for Wireless Communication (Dagstuhl Seminar 14051)}},
  pages =	{152--169},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2014},
  volume =	{4},
  number =	{1},
  editor =	{Even, Guy and Halldorson, Magnus and Pignolet, Yvonne Anne and Scheideler, Christian},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagRep.4.1.152},
  URN =		{urn:nbn:de:0030-drops-45397},
  doi =		{10.4230/DagRep.4.1.152},
  annote =	{Keywords: wireless, algorithms, model, complexity}
}
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