MixEth: Efficient, Trustless Coin Mixing Service for Ethereum

Authors István András Seres , Dániel A. Nagy, Chris Buckland, Péter Burcsi

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István András Seres
  • Eötvös Loránd University, Hungary
Dániel A. Nagy
  • Eötvös Loránd University, Hungary
Chris Buckland
  • King’s College London, United Kingdom
Péter Burcsi
  • Eötvös Loránd University, Hungary


We would like to thank Liam Horne for helping with the state channel implementation, Barry Whitehat, Dmitry Khovratovich and Sina Mahmoodi for the insightful comments and discussions.

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István András Seres, Dániel A. Nagy, Chris Buckland, and Péter Burcsi. MixEth: Efficient, Trustless Coin Mixing Service for Ethereum. In International Conference on Blockchain Economics, Security and Protocols (Tokenomics 2019). Open Access Series in Informatics (OASIcs), Volume 71, pp. 13:1-13:20, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)


Coin mixing is a prevalent privacy-enhancing technology for cryptocurrency users. In this paper, we present MixEth, which is a trustless coin mixing service for Turing-complete blockchains. MixEth does not rely on a trusted setup and is more efficient than any proposed trustless coin tumbler. It requires only 3 on-chain transactions at most per user and 1 off-chain message. It achieves strong notions of anonymity and is able to resist denial-of-service attacks. Furthermore the underlying protocol can also be used to efficiently shuffle ballots, ciphertexts in a trustless and decentralized manner.

Subject Classification

ACM Subject Classification
  • Theory of computation → Cryptographic protocols
  • Cryptography
  • Verifiable shuffle
  • Anonymity
  • Cryptocurrency
  • Ethereum
  • Coin mixer
  • State Channel


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