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A Blockchain-enabled Anonymous-yet-Traceable Distributed Key Generation

Dehez-Clementi, Marina and Lacan, Jérôme and Deneuville, Jean-Christophe and Asghar, Hassan and Kaafar, Mohamed Ali A Blockchain-enabled Anonymous-yet-Traceable Distributed Key Generation. (2021) In: 2021 IEEE International Conference on Blockchain (Blockchain), 6 December 2021 - 8 December 2021 (Melbourne, Australia).

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Official URL: https://doi.org/10.1109/Blockchain53845.2021.00042

Abstract

Many threshold systems require some kind of secret sharing during their set-up phase. There has been several recent work in doing secret sharing in a distributed manner through the use of Blockchain so that one does not have to rely on trusted third parties nor strong assumptions about the communication medium. This paper continues this line of work and presents a new protocol for distributed key generation (DKG). We develop a new technique that leverages the mainchain of a popular blockchain platform like Bitcoin, together with a mixing service and a group signature scheme, to provide anonymity and traceability; we connect this to a sidechain, pegged to the mainchain, that brings a better scalability. We implemented the technique on the joint platform Bitcoin/RootStock and use CoinJoin/CoinShuffle as the mixing service. The evaluation section shows a decrease by 99% in the execution cost of our protocol compared to the same implementation on a smart- contract-friendly blockchain such as Ethereum.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to the IEEE (Institute of Electrical and Electronics Engineers). This paper is available at : https://ieeexplore.ieee.org/document/9680537 “© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Université de Toulouse > Ecole Nationale de l'Aviation Civile - ENAC (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Macquarie University (AUSTRALIA)
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Deposited On:17 Jan 2023 09:41

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