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.
@article{arxiv.2002.09689,
title = {Fair and Decentralized Exchange of Digital Goods},
author = {Ariel Futoransky and Carlos Sarraute and Daniel Fernandez and Matias Travizano and Ariel Waissbein},
journal= {arXiv preprint arXiv:2002.09689},
year = {2020}
}