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Title:
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A privacy-preserving reputation system with user rewards
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Author:
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Busom Figueres, Núria; Petrlic, R.; Sebé Feixas, Francesc; Sorge, C.; Valls Marsal, Magda
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Notes:
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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.
The authors acknowledge partial support by Spanish-German Integrated Actions under the project 57049770, the Spanish Government under project MTM2013-46949-P, and by the Government of Catalonia under grant 2014FI_B2 00036. |
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Subject(s):
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-Reputation system
-Reputation management
-Anonymity
-Privacy |
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Rights:
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(c) Elsevier Ltd, 2016
info:eu-repo/semantics/restrictedAccess |
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Document type:
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article
publishedVersion |
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Published by:
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Elsevier
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