Composable Privacy-Preserving Framework for Stakes-Based Online Peer-to-Peer Applications

dc.contributor.authorHristov-Kalamov, Nikola
dc.contributor.authorFernández-Ruiz, Raúl
dc.contributor.authorÁlvarez-Marquina, Agustín
dc.contributor.authorGuillén-García, Julio
dc.contributor.authorGallardo-Cava, Roberto
dc.contributor.authorPalacios-Alonso, Daniel
dc.date.accessioned2025-07-30T11:05:49Z
dc.date.available2025-07-30T11:05:49Z
dc.date.issued2025-07-01
dc.description.abstractAs the demand for expansive back-end systems in online applications continues to grow, novel frameworks are necessitated to address the escalating operational demands, energy consumption, and associated costs. Traditional Client–Server models, while offering centralized security and reliability, are characterized by their high deployment and maintenance expenses. Conversely, Peer-to-Peer (P2P) models, despite being cost-effective and scalable, are hindered by inherent security and data integrity challenges. Moreover, the lack of a central authority in P2P systems complicates a definitive resolution of scenarios involving stakes, where users cannot withdraw without incurring a tangible loss. In this research work, a hybrid back-end framework is introduced, combining the advantages of both models through the utilization of cryptographic algorithms and Secure Multi-Party Computation (MPC) protocols. The baseline solution is lightweight and fully composable, making it capable of utilizing different more complex slot-in MPC techniques. The proposed framework’s effectiveness is demonstrated through a simplified two-player Spades game, although it is fully generalizable to any application. Evaluations across multiple case studies reveal substantial performance enhancements compared to conventional approaches, particularly post-initialization, highlighting the scheme’s potential as a cost-effective, energy-efficient, and secure solution for modern online applications.
dc.identifier.citationHristov-Kalamov, N.; Fernández-Ruiz, R.; Álvarez-Marquina, A.; Guillén-García, J.; Gallardo-Cava, R.; Palacios-Alonso, D. Composable Privacy-Preserving Framework for Stakes-Based Online Peer-to-Peer Applications. Cryptography 2025, 9, 48. https://doi.org/10.3390/cryptography9030048
dc.identifier.doi10.3390/cryptography9030048
dc.identifier.issn2410-387X
dc.identifier.urihttps://hdl.handle.net/10115/96597
dc.language.isoen_US
dc.publisherMDPI
dc.relation.ispartofCryptography
dc.rightsAttribution 4.0 Internationalen
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectcryptography
dc.subjectsecure multi-party computation
dc.subjectgarbled circuits
dc.subjectoblivious pseudo-random function
dc.subjectfunction secret sharing
dc.subjectpeer-to-peer
dc.titleComposable Privacy-Preserving Framework for Stakes-Based Online Peer-to-Peer Applications
dc.typeArticle
oaire.citation.issue3
oaire.citation.volume9

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