2 Search Results for "Papadimitratos, Panagiotis"

Document
DOI: 10.4230/LIPIcs.AFT.2025.3
Fast, Private and Regulated Payments in Asynchronous Networks

Authors: Maxence Brugeres, Victor Languille, Petr Kuznetsov, and Hamza Zarfaoui

Published in: LIPIcs, Volume 354, 7th Conference on Advances in Financial Technologies (AFT 2025)

Abstract
We propose a decentralized asset-transfer system that enjoys full privacy: no party can learn the details of a transaction, except for its issuer and its recipient. Furthermore, the recipient is not aware of the sender’s identity. Our system does not rely on consensus or synchrony assumptions, and therefore, it is responsive, since it runs at the actual network speed. Under the hood, every transaction creates a consumable coin equipped with a non-interactive zero-knowledge proof (NIZK) that confirms that the issuer has sufficient funds without revealing any information about her identity, the recipient’s identity, or the payment amount. Moreover, we equip our system with a regulatory enforcement mechanism that can be used to regulate transfer limits or restrict specific addresses from sending or receiving funds, while preserving the system’s privacy guarantees. Finally, we report on PaxPay, our implementation of Fully Private Asset Transfer (FPAT) that uses the Gnark library for the NIZKs. In our benchmark, PaxPay exhibits better performance than earlier proposals that either ensure only partial privacy, require some kind of network synchrony or do not implement regulation features. Our system thus reconciles privacy, responsiveness, regulation enforcement and performance.
Cite as

Maxence Brugeres, Victor Languille, Petr Kuznetsov, and Hamza Zarfaoui. Fast, Private and Regulated Payments in Asynchronous Networks. In 7th Conference on Advances in Financial Technologies (AFT 2025). Leibniz International Proceedings in Informatics (LIPIcs), Volume 354, pp. 3:1-3:24, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{brugeres_et_al:LIPIcs.AFT.2025.3,
  author =	{Brugeres, Maxence and Languille, Victor and Kuznetsov, Petr and Zarfaoui, Hamza},
  title =	{{Fast, Private and Regulated Payments in Asynchronous Networks}},
  booktitle =	{7th Conference on Advances in Financial Technologies (AFT 2025)},
  pages =	{3:1--3:24},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-400-0},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{354},
  editor =	{Avarikioti, Zeta and Christin, Nicolas},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.AFT.2025.3},
  URN =		{urn:nbn:de:0030-drops-247227},
  doi =		{10.4230/LIPIcs.AFT.2025.3},
  annote =	{Keywords: Anonymous, Asset Transfer, Asynchronous System, BFT, CBDC, NIZK, Payment System, Privacy, Regulation, Scalability, zk-SNARK}
}
Document
DOI: 10.4230/DagSemProc.10402.4
10402 Report – Working Group on Security and Privacy

Authors: Frank Kargl, Levente Buttyan, David Eckhoff, Panagiotis Papadimitratos, and Elmar Schoch

Published in: Dagstuhl Seminar Proceedings, Volume 10402, Inter-Vehicular Communication (2011)

Abstract
In the security working group, participants created an overview map of current topics in IVC security and privacy research that also includes an estimate of maturity of certain topics.
Cite as

Frank Kargl, Levente Buttyan, David Eckhoff, Panagiotis Papadimitratos, and Elmar Schoch. 10402 Report – Working Group on Security and Privacy. In Inter-Vehicular Communication. Dagstuhl Seminar Proceedings, Volume 10402, pp. 1-4, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)

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@InProceedings{kargl_et_al:DagSemProc.10402.4,
  author =	{Kargl, Frank and Buttyan, Levente and Eckhoff, David and Papadimitratos, Panagiotis and Schoch, Elmar},
  title =	{{10402 Report – Working Group on Security and Privacy}},
  booktitle =	{Inter-Vehicular Communication},
  pages =	{1--4},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10402},
  editor =	{Falko Dressler and Frank Kargl and J\"{o}rg Ott and Ozan K. Tonguz and Lars Wischhof},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.10402.4},
  URN =		{urn:nbn:de:0030-drops-29275},
  doi =		{10.4230/DagSemProc.10402.4},
  annote =	{Keywords: IVC, C2X, VANET, security, privacy}
}
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