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Möbius: Trustless Tumbling for Transaction Privacy

Meiklejohn, S; Mercer, R; (2018) Möbius: Trustless Tumbling for Transaction Privacy. Proceedings on Privacy Enhancing Technologies (PoPETs) , 2018 (2) pp. 105-121. 10.1515/popets-2018-0015. Green open access

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Abstract

Cryptocurrencies allow users to securely transfer money without relying on a trusted intermediary, and the transparency of their underlying ledgers also enables public verifiability. This openness, however, comes at a cost to privacy, as even though the pseudonyms users go by are not linked to their real-world identities, all movement of money among these pseudonyms is traceable. In this paper, we present Möbius, an Ethereum-based tumbler or mixing service. Möbius achieves strong notions of anonymity, as even malicious senders cannot identify which pseudonyms belong to the recipients to whom they sent money, and is able to resist denial-of-service attacks. It also achieves a much lower off-chain communication complexity than all existing tumblers, with senders and recipients needing to send only two initial messages in order to engage in an arbitrary number of transactions.

Type: Article
Title: Möbius: Trustless Tumbling for Transaction Privacy
Open access status: An open access version is available from UCL Discovery
DOI: 10.1515/popets-2018-0015
Publisher version: https://doi.org/10.1515/popets-2018-0015
Language: English
Additional information: Copyright © 2018 Sarah Meiklejohn et al., published by De Gruyter Open. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License (CC BY-NC-ND 3.0 - https://creativecommons.org/licenses/by-nc-nd/3.0/)
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: https://discovery.ucl.ac.uk/id/eprint/10046841
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