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Reputation-Based Resource Allocation in P2P Systems of Rational Users

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Executive Summary

In this paper, the authors study p2p systems, where peers have to share their available resources between their own and other peers' needs. One such example is a system of peers who use their capacity-limited access links both for their upstream and downstream connections. In the selfish approach, each peer would like to exploit the full capacity of his access link only for his downloads. However, if all peers acted selfishly, the system would collapse. In order to motivate peers to cooperate, they propose a distributed reputation-based system according to which peers earn reputation analogous to their contributions.

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