A Trustless Privacy-Preserving Reputation System

Abstract : Reputation systems are crucial for distributed applications in which users have to be made accountable for their actions, such as e-commerce websites. However, existing systems often disclose the identity of the raters, which might deter honest users from submitting reviews out of fear of retaliation from the ratees. While many privacy-preserving reputation systems have been proposed, we observe that none of them is simultaneously truly decentralized, trustless, and suitable for real world usage in, for example, e-commerce applications. In this paper, we present a blockchain based decentralized privacy-preserving reputation system. We demonstrate that our system provides correctness and security while eliminating the need for users to trust any third parties or even fellow users.
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Communication dans un congrès
Jaap-Henk Hoepman; Stefan Katzenbeisser. 31st IFIP International Information Security and Privacy Conference (SEC), May 2016, Ghent, Belgium. IFIP Advances in Information and Communication Technology, AICT-471, pp.398-411, 2016, ICT Systems Security and Privacy Protection. 〈10.1007/978-3-319-33630-5_27〉
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Alexander Schaub, Rémi Bazin, Omar Hasan, Lionel Brunie. A Trustless Privacy-Preserving Reputation System. Jaap-Henk Hoepman; Stefan Katzenbeisser. 31st IFIP International Information Security and Privacy Conference (SEC), May 2016, Ghent, Belgium. IFIP Advances in Information and Communication Technology, AICT-471, pp.398-411, 2016, ICT Systems Security and Privacy Protection. 〈10.1007/978-3-319-33630-5_27〉. 〈hal-01369572〉

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