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Paper 2020/184

Fair and Decentralized Exchange of Digital Goods

Ariel Futoransky, Carlos Sarraute, Daniel Fernandez, Matias Travizano, and Ariel Waissbein


We construct a privacy-preserving, distributed and decentralized marketplace where parties can exchange data for tokens. In this market, buyers and sellers make transactions in a blockchain and interact with a third party, called notary, who has the ability to vouch for the authenticity and integrity of the data. We introduce a protocol for the data-token exchange where neither party gains more information than what it is paying for, and the exchange is fair: either both parties gets the other's item or neither does. No third party involvement is required after setup, and no dispute resolution is needed.

Available format(s)
Cryptographic protocols
Publication info
Preprint. MINOR revision.
blockchainsmart contractsdecentralized marketplacefair exchange
Contact author(s)
csarraute @ gmail com
2020-02-18: received
Short URL
Creative Commons Attribution


      author = {Ariel Futoransky and Carlos Sarraute and Daniel Fernandez and Matias Travizano and Ariel Waissbein},
      title = {Fair and Decentralized Exchange of Digital Goods},
      howpublished = {Cryptology ePrint Archive, Paper 2020/184},
      year = {2020},
      note = {\url{https://eprint.iacr.org/2020/184}},
      url = {https://eprint.iacr.org/2020/184}
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