Practical privacy-preserving mixing protocol for Bitcoin

Qianqian Chang, Lin Xu*, Lei Zhang*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The privacy of Cryptocurrencies are of great concern in various fields. Researches has shown that pseudonyms, which are used in Bitcoin, only provide weak privacy. The privacy of users may be put at risk under deanonymization attacks. The exisiting schemes typically require a trusted-third party to achieve anonymity, however this usually faces a single-point fault. In addition, existing schemes suffer from high communication complexity and impracticality. This paper proposes a practical privacy-preserving mixing protocol for Bitcoin to achieve unlink-ability of input and output address of transactions. Compared to existing schemes, our protocol improves practicality. The communication complexity of our protocol is linearly related to the number of peers. Moreover, our protocol is scalable as it works not only for Bitcoin, but also for other cryptocurrencies.

Original languageEnglish
Title of host publicationProceedings of the 2023 26th International Conference on Computer Supported Cooperative Work in Design, CSCWD 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages17-22
Number of pages6
ISBN (Electronic)9798350331684
DOIs
StatePublished - 2023
Event26th International Conference on Computer Supported Cooperative Work in Design, CSCWD 2023 - Rio de Janeiro, Brazil
Duration: 24 May 202326 May 2023

Publication series

NameProceedings of the 2023 26th International Conference on Computer Supported Cooperative Work in Design, CSCWD 2023

Conference

Conference26th International Conference on Computer Supported Cooperative Work in Design, CSCWD 2023
Country/TerritoryBrazil
CityRio de Janeiro
Period24/05/2326/05/23

Keywords

  • Bitcoin
  • anonymity
  • cryptocurrencies
  • privacy
  • unlinkability

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