Cryptology ePrint Archive: Report 2020/184

Fair and Decentralized Exchange of Digital Goods

Ariel Futoransky and Carlos Sarraute and Daniel Fernandez and Matias Travizano and 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.

Category / Keywords: cryptographic protocols / blockchain, smart contracts, decentralized marketplace, fair exchange

Date: received 14 Feb 2020

Contact author: csarraute at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20200218:090336 (All versions of this report)

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