A Digital Cash Paradigm with Valued and No-Valued e-Coins

dc.contributor.authorBorges Llorens, Ricard
dc.contributor.authorSebé Feixas, Francesc
dc.date.accessioned2021-11-18T08:36:42Z
dc.date.available2021-11-18T08:36:42Z
dc.date.issued2021
dc.description.abstractDigital cash is a form of money that is stored digitally. Its main advantage when compared to traditional credit or debit cards is the possibility of carrying out anonymous transactions. Diverse digital cash paradigms have been proposed during the last decades, providing different approaches to avoid the double-spending fraud, or features like divisibility or transferability. This paper presents a new digital cash paradigm that includes the so-called no-valued e-coins, which are e-coins that can be generated free of charge by customers. A vendor receiving a payment cannot distinguish whether the received e-coin is valued or not, but the customer will receive the requested digital item only in the former case. A straightforward application of bogus transactions involving no-valued e-coins is the masking of consumption patterns. This new paradigm has also proven its validity in the scope of privacy-preserving pay-by-phone parking systems, and we believe it can become a very versatile building block in the design of privacy-preserving protocols in other areas of research. This paper provides a formal description of the new paradigm, including the features required for each of its components together with a formal analysis of its security.ca_ES
dc.description.sponsorshipThis research was funded by the Spanish Ministry of Science, Innovation and Universities grant number MTM2017-83271-R.ca_ES
dc.identifier.doihttps://doi.org/10.3390/app11219892
dc.identifier.idgrec031978
dc.identifier.issn2076-3417
dc.identifier.urihttp://hdl.handle.net/10459.1/72348
dc.language.isoengca_ES
dc.publisherMDPIca_ES
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de InvestigaciĂłn CientĂ­fica y TĂ©cnica y de InnovaciĂłn 2013-2016/MTM2017-83271-R/ES/CRIPTOGRAFIA Y CODIGOS PARA APLICACIONES SEGURAS Y FIABLES/ca_ES
dc.relation.isformatofReproducciĂł del document publicat a https://doi.org/10.3390/app11219892ca_ES
dc.relation.ispartofApplied Sciences, 2021, vol. 11, nĂşm. 21, 9892ca_ES
dc.rightscc-by (c) Ricard Borges, Francesc Sebé, 2021ca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectCryptographyca_ES
dc.subjectDigital cashca_ES
dc.subjectPrivacyca_ES
dc.titleA Digital Cash Paradigm with Valued and No-Valued e-Coinsca_ES
dc.typeinfo:eu-repo/semantics/articleca_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_ES
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