Koinonia: verifiable e-voting with long-term privacy

dc.contributor.authorGe, Huangyi
dc.contributor.authorChau, Sze Yiu
dc.contributor.authorGonsalves, Victor E.
dc.contributor.authorLiu, Huian
dc.contributor.authorWang, Tianhao
dc.contributor.authorZou, Xukai
dc.contributor.authorLi, Ninghui
dc.contributor.departmentComputer and Information Science, School of Scienceen_US
dc.date.accessioned2020-11-06T16:08:07Z
dc.date.available2020-11-06T16:08:07Z
dc.date.issued2019
dc.description.abstractDespite years of research, many existing e-voting systems do not adequately protect voting privacy. In most cases, such systems only achieve "immediate privacy", that is, they only protect voting privacy against today's adversaries, but not against a future adversary, who may possess better attack technologies like new cryptanalysis algorithms and/or quantum computers. Previous attempts at providing long-term voting privacy (dubbed "everlasting privacy" in the literature) often require additional trusts in parties that do not need to be trusted for immediate privacy. In this paper, we present a framework of adversary models regarding e-voting systems, and analyze possible threats to voting privacy under each model. Based on our analysis, we argue that secret-sharing based voting protocols offer a more natural and elegant privacy-preserving solution than their encryption-based counterparts. We thus design and implement Koinonia, a voting system that provides long-term privacy against powerful adversaries and enables anyone to verify that each ballot is well-formed and the tallying is done correctly. Our experiments show that Koinonia protects voting privacy with a reasonable performance.en_US
dc.eprint.versionAuthor's manuscripten_US
dc.identifier.citationGe, H., Chau, S. Y., Gonsalves, V. E., Li, H., Wang, T., Zou, X., & Li, N. (2019). Koinonia: Verifiable e-voting with long-term privacy. Proceedings of the 35th Annual Computer Security Applications Conference, 270–285. https://doi.org/10.1145/3359789.3359804en_US
dc.identifier.urihttps://hdl.handle.net/1805/24283
dc.language.isoenen_US
dc.publisherACMen_US
dc.relation.isversionof10.1145/3359789.3359804en_US
dc.relation.journalProceedings of the 35th Annual Computer Security Applications Conferenceen_US
dc.rightsPublisher Policyen_US
dc.sourceAuthoren_US
dc.subjectprivacyen_US
dc.subjecte-votingen_US
dc.subjectvoting privacyen_US
dc.titleKoinonia: verifiable e-voting with long-term privacyen_US
dc.typeArticleen_US
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