Fair and Decentralized Exchange of Digital Goods

Ariel Futoransky; Carlos Sarraute; Daniel Fernandez; Matias Travizano; Ariel Waissbein

Paper 2020/184 Original: eprint.iacr.org/2020/184 ↗

Fair and Decentralized Exchange of Digital Goods

Ariel Futoransky

Carlos Sarraute

Daniel Fernandez

Matias Travizano

Ariel Waissbein

Abstract

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.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Preprint.
History: 2020-02-18: last updated; 2020-02-18: published
Short URL: https://ia.cr/2020/184
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2020/184,
      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},
      url = {https://eprint.iacr.org/2020/184}
}