Privacy-Preserving and Co-utile Distributed Social Credit
Reputation is a powerful incentive for agents to abide by the prescribed rules of an interaction. In computer science, reputation can be phrased as being an artificial incentive that can turn into self-enforcing protocols that would not be such otherwise. Quite recently, China has announced a national reputation system that will be launched in the future under the name of social credit system. However, to be generalizable without damaging the privacy of citizens/agents, a reputation system must be decentralized and privacy-preserving. We present a peer-to-peer fully distributed reputation protocol in which the anonymity of both the scoring and the scored agents is maintained. At the same time, the reputation protocol itself is co-utile, that is, the rational option for all agents is to honestly fulfill their part in the protocol.
KeywordsProtocols Reputation P2P Self-enforcement Co-utility Privacy
Acknowledgments and Disclaimer
Partial support to this work has been received from the Templeton World Charity Foundation (grant TWCF0095/AB60 “CO-UTILITY”), ARC (grant DP160100913), the European Commission (projects H2020-644024 “CLARUS” and H2020-700540 “CANVAS”), the Government of Catalonia (ICREA Acadèmia Prize) and the Spanish Government (projects TIN2014-57364-C2-1-R “SmartGlacis” and TIN 2015-70054-REDC). The author holds the UNESCO Chair in Data Privacy, but the views in this paper are the author’s own and are not necessarily shared by UNESCO.
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