The effect of collusion in congestion games
Proceedings of the thirty-eighth annual ACM symposium on Theory of computing
EquiCast: scalable multicast with selfish users
Proceedings of the twenty-fifth annual ACM symposium on Principles of distributed computing
OSDI '06 Proceedings of the 7th USENIX Symposium on Operating Systems Design and Implementation - Volume 7
FlightPath: obedience vs. choice in cooperative services
OSDI'08 Proceedings of the 8th USENIX conference on Operating systems design and implementation
Collusion-resilient credit-based reputations for peer-to-peer content distribution
Proceedings of the 2010 Workshop on Economics of Networks, Systems, and Computation
Sybil defenses via social networks: a tutorial and survey
ACM SIGACT News
DCast: sustaining collaboration in overlay multicast despite rational collusion
Proceedings of the 2012 ACM conference on Computer and communications security
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This paper focuses on designing incentive mechanisms for overlay multicast systems. Existing proposals on the problem are no longer able to provide proper incentives when rational users collude or launch sybil attacks. To overcome this key limitation, we propose a novel decentralized DCast multicast protocol and prove that it offers a novel concept of safety-net guarantee: A user running the protocol will always obtain at least a reasonably good utility despite the deviation of any number of rational users that potentially collude or launch sybil attacks.