TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Busom, Nuria
A1  - Petrlic, Ronald
A1  - Sebe, Francesc
A1  - Sorge, Christoph
A1  - Valls, Magda
T1  - A privacy-preserving reputation system with user rewards
JF  - Journal of Network and Computer Applications
N2  - 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.
Y1  - 2017
VL  - 80
SP  - 58
EP  - 66
PB  - Academic Pr.
CY  - London
ER  -