Toward Fairness of Cryptocurrency Payments

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Liu, Jian Li, Wenting Karame, Ghassan O. Asokan, N. 2018-12-10T10:16:05Z 2018-12-10T10:16:05Z 2018-05-01
dc.identifier.citation Liu , J , Li , W , Karame , G O & Asokan , N 2018 , ' Toward Fairness of Cryptocurrency Payments ' , IEEE Security and Privacy , vol. 16 , no. 3 , pp. 81-89 . en
dc.identifier.issn 1540-7993
dc.identifier.other PURE UUID: 46a8eba8-0326-44fc-b237-e2bd4fcc9e22
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract Motivated by the great success and adoption of Bitcoin, a number of cryptocurrencies such as Litecoin, Dogecoin, and Ethereum are becoming increasingly popular. Although existing blockchain-based cryptocurrency schemes can ensure reasonable security for transactions, they do not consider any notion of fairness. Fair exchange allows two players to exchange digital 'items,' such as digital signatures, over insecure networks fairly, so that either each player gets the other's item, or neither player does. Given that blockchain participants typically do not trust each other, enabling fairness in existing cryptocurrencies is an essential but insufficiently explored problem. In this article, we explore the solution space for enabling the fair exchange of a cryptocurrency payment for a receipt. We identify the timeliness of an exchange as an important property especially when one of the parties involved in the exchange is resource-constrained. We introduce the notion of strong timeliness for a fair exchange protocoland propose two fair payment-for-receipt protocol instantiations that leverage functionality of the blockchain to achieve strong timeliness. We implement both and compare their security and efficiency. en
dc.format.extent 9
dc.format.extent 81-89
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries IEEE Security and Privacy en
dc.relation.ispartofseries Volume 16, issue 3 en
dc.rights openAccess en
dc.subject.other Computer Networks and Communications en
dc.subject.other Electrical and Electronic Engineering en
dc.subject.other Law en
dc.subject.other 113 Computer and information sciences en
dc.title Toward Fairness of Cryptocurrency Payments en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Computer Science
dc.contributor.department NEC Corporation
dc.subject.keyword bitcoin
dc.subject.keyword cryptocurrency
dc.subject.keyword ethereum
dc.subject.keyword fair exchange
dc.subject.keyword security
dc.subject.keyword Computer Networks and Communications
dc.subject.keyword Electrical and Electronic Engineering
dc.subject.keyword Law
dc.subject.keyword 113 Computer and information sciences
dc.identifier.urn URN:NBN:fi:aalto-201812106039
dc.identifier.doi 10.1109/MSP.2018.2701163
dc.type.version acceptedVersion

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