Reputation systems for content discovery

Building a reputation system for a decentralized network without a trusted third party is a challenging problem. A trusted third party adds additional cost and security risk.
Without one, collusion is a problem because reputation systems are based on feedback from peers, e.g. malicious peers can collude to give each other good ratings while giving negative ratings to other peers. This project deals with building a practical reputation system under some reasonable assumptions, e.g. the malicious nodes are in a minority.