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.
| Author: | Nuria Busom, Ronald Petrlic, Francesc Sebe, Christoph Sorge, Magda Valls |
|---|---|
| Parent Title (English): | Journal of Network and Computer Applications |
| Volume: | 80 |
| Publisher: | Academic Pr. |
| Place of publication: | London |
| Document Type: | Article |
| Language: | English |
| 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): |  Urheberrechtlich geschützt |
