Paper 2019/563

ShareLock: Mixing for Cryptocurrencies from Multiparty ECDSA

Omer Shlomovits and István András Seres


Many cryptocurrencies, such as Bitcoin and Ethereum, do not provide any financial privacy to their users. These systems cannot be used as a medium of exchange as long as they are transparent. Therefore the lack of privacy is the largest hurdle for cryptocurrency mass adoption next to scalability issues. Although many privacy-enhancing schemes had been already proposed in the literature, most of them did not get traction due to either their complexity or their adoption would rely on severe changes to the base protocol. To close this gap, in this work we propose ShareLock, a practical privacy-enhancing tool for cryptocurrencies which is deployable on today's cryptocurrency networks.

Available format(s)
Cryptographic protocols
Publication info
Preprint. MINOR revision.
CryptocurrencyCryptographic protocolPrivacyAnonymityThreshold CryptographyBitcoinEthereumDistributed Key Generation
Contact author(s)
omer @ kzencorp com
istvanseres @ caesar elte hu
2019-05-27: received
Short URL
Creative Commons Attribution


      author = {Omer Shlomovits and István András Seres},
      title = {ShareLock: Mixing for Cryptocurrencies from Multiparty ECDSA},
      howpublished = {Cryptology ePrint Archive, Paper 2019/563},
      year = {2019},
      note = {\url{}},
      url = {}
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