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dc.contributor.authorGonzález Vasco, Maria Isabel
dc.contributor.authorHeidarvand, Somayed
dc.contributor.authorVillar Santos, Jorge Luis
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Matemàtica Aplicada IV
dc.identifier.citationGonzález, M.I.; Heidarvand, S.; Villar, J. Anonymous subscription schemes : a flexible fonstruction for on-line services access. A: International Conference on Security and Cryptography. "SECRYPT 2010 Proceedings of the International Conference on Security and Cryptography". Athens: IEEE Press. Institute of Electrical and Electronics Engineers, 2010, p. 120-131.
dc.description.abstractIn traditional e-cash systems, the tradeoff between anonymity and fraud-detection is solved by hiding the identity of the user into the e-coin, and providing an additional triggering mechanism that opens this identity in case of double spending. Hence, fraud detection implies loss of anonymity. This seems to be a somewhat natural solution when universality of the e-coin is required (i.e., the use of the coin is not determined at the time the coin is generated). However, much simpler protocols may suffice if we only want to prevent that payments for accessing certain services are over-used, even when users' anonymity is perfectly preserved. In this paper we propose a simple and efficient Subscription Scheme, allowing a set of users to anonymously pay for and request access to different services offered by a number of service providers. In our approach, the use of the token is completely determined at issuing time, yet this final aim remains hidden to the issuing authority. Moreover, fraud detection here implies no loss of anonymity; as we make access tokens independent of the owner in a quite simple and efficient way. On the other hand, if different usages of the same token are allowed, these are fully traceable by the service providers.
dc.format.extent12 p.
dc.publisherIEEE Press. Institute of Electrical and Electronics Engineers
dc.subjectÀrees temàtiques de la UPC::Informàtica::Seguretat informàtica::Criptografia
dc.subject.lcshElectronic funds transfers
dc.subject.lcshE-cash systems
dc.titleAnonymous subscription schemes : a flexible fonstruction for on-line services access
dc.typeConference report
dc.subject.lemacComerç electrònic -- Aspectes econòmics
dc.contributor.groupUniversitat Politècnica de Catalunya. MAK - Matemàtica Aplicada a la Criptografia
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
upcommons.citation.authorGonzález, M.I.; Heidarvand, S.; Villar, J.
upcommons.citation.contributorInternational Conference on Security and Cryptography
upcommons.citation.publicationNameSECRYPT 2010 Proceedings of the International Conference on Security and Cryptography

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