Clover: an anonymous transaction relay protocol for the bitcoin P2P network

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• dc.contributor.author Franzoni, Federico
• dc.contributor.author Daza, Vanesa
• dc.date.accessioned 2022-05-23T06:32:33Z
• dc.date.available 2022-05-23T06:32:33Z
• dc.date.issued 2022
• dc.description.abstract The Bitcoin P2P network currently represents a reference benchmark for modern cryptocurrencies. Its underlying protocol defnes how transactions and blocks are distributed through all participating nodes. To protect user privacy, the identity of the node originating a message is kept hidden. However, an adversary observing the whole network can analyze the spread pattern of a transaction to trace it back to its source. This is possible thanks to the so-called rumor centrality, which is caused by the symmetry in the spreading of gossip-like protocols. Recent works try to address this issue by breaking the symmetry of the Difusion protocol, currently used in Bitcoin, and leveraging proxied broadcast. Nonetheless, the complexity of their design can be a barrier to their adoption in real life. In this work, we propose Clover, a novel transaction relay protocol that protects the source of transaction messages with a simple, yet efective, design. Compared to previous solutions, our protocol does not require building propagation graphs, and reduces the ability of the adversary to gain precision by opening multiple connections towards the same node. Experimental results show that the deanonymization accuracy of an eavesdropper adversary against Clover is up to 10 times smaller compared to Difusion.
• dc.format.mimetype application/pdf
• dc.identifier.citation Franzoni F, Daza V. Clover: an anonymous transaction relay protocol for the bitcoin P2P network. Peer Peer Netw Appl. 2022;15:290-303. DOI: 10.1007/s12083-021-01241-z
• dc.identifier.doi http://doi.org/10.1007/s12083-021-01241-z
• dc.identifier.issn 1936-6442
• dc.identifier.uri http://hdl.handle.net/10230/53196
• dc.language.iso eng
• dc.publisher Springer
• dc.relation.ispartof Peer-to-Peer Networking and Applications. 2022;15:290-303.
• dc.rights © The Author(s) 2021 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.rights.uri http://creativecommons.org/licenses/by/4.0/
• dc.subject.keyword Blockchain
• dc.subject.keyword Bitcoin
• dc.subject.keyword Anonymity
• dc.subject.keyword Data propagation
• dc.title Clover: an anonymous transaction relay protocol for the bitcoin P2P network
• dc.type info:eu-repo/semantics/article
• dc.type.version info:eu-repo/semantics/publishedVersion