Cryptology ePrint Archive: Report 2017/1018

A Fair Protocol for Data Trading Based on Bitcoin Transactions

Sergi Delgado-Segura and Cristina Pérez-Solà and Guillermo Navarro-Arribas and Jordi Herrera-Joancomartí

Abstract: On-line commercial transactions involve an inherent mistrust between participant parties since, sometimes, no previous relation exists between them. Such mistrust may be a deadlock point in a trade transaction where the buyer does not want to perform the payment until the seller sends the good and the seller does not want to do so until the buyer pays for the purchase. In this paper we present a fair protocol for data trading where the commercial deal, in terms of delivering the data and performing the payment, is atomic since the seller cannot redeem the payment unless the buyer obtains the data and the buyer cannot obtain the data without performing the payment. The protocol is based on Bitcoin scripting language and the fairness of the protocol can be probabilistically enforced.

Category / Keywords: applications / electronic commerce and payment, fair exchange, blockchain, Bitcoin

Original Publication (with minor differences): Future Generation Computer Systems

Date: received 13 Oct 2017, last revised 25 Oct 2017

Contact author: guillermo navarro at uab cat

Available format(s): PDF | BibTeX Citation

Note: Preprint of: Sergi Delgado-Segura, Cristina Pérez-Solà, Guillermo Navarro-Arribas, Jordi Herrera-Joancomartí, A fair protocol for data trading based on Bitcoin transactions, In Future Generation Computer Systems, 2017, In Press, ISSN 0167-739X, (

Version: 20171025:140858 (All versions of this report)

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