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A privacy-preserving reputation system with user rewards

  • Reputation systems are useful to assess the trustworthiness of potential transaction partners, but also a potential threat to privacy since rating profiles reveal users’ preferences. Anonymous reputation systems resolve this issue, but make it difficult to assess the trustworthiness of a rating. We introduce a privacy-preserving reputation system that enables anonymous ratings while making sure that only authorized users can issue ratings. In addition, ratings can be endorsed by other users. A user who has received a pre-defined number of endorsements can prove this fact, and be rewarded e.g. by receiving a “Premium member” status. The system is based on advanced cryptographic primitives such as Chaum-Pedersen blind signatures, verifiable secret sharing and oblivious transfer.

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Author:Nuria Busom, Ronald Petrlic, Francesc Sebe, Christoph Sorge, Magda Valls
Parent Title (English):Journal of Network and Computer Applications
Publisher:Academic Pr.
Place of publication:London
Document Type:Article
Date of Publication (online):2018/03/16
Year of first Publication:2017
Publishing Institution:Deutsches Forschungsinstitut für öffentliche Verwaltung
Release Date:2018/03/16
First Page:58
Last Page:66
Documents of the German Research Institute for Public Administration (FÖV):Sonstige Schriften
Licence (German):License LogoUrheberrechtlich geschützt