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H-Trust: A Robust and Lightweight Group Reputation System for Peer-to-Peer Desktop Grid

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2 Author(s)
Huanyu Zhao ; Dept. of Comput. Sci., Oklahoma State Univ., Stillwater, OK ; Xiaolin Li

We propose a robust and lightweight group reputation system, called H-Trust, inspired by the h-index aggregation technique. Leveraging the robustness of the h-index algorithm under incomplete and uncertain circumstances, H-Trust offers a robust reputation evaluation mechanism for both individual and group trusts with minimal communication and computation overheads. The five phases of H-Trust scheme are presented in detail, including trust recording, local trust evaluation, trust query phase, spatial-temporal update phase, and group reputation evaluation phases. The rationale for its design, the analysis of the algorithm complexity and security level are further elaborated. To validate the performance of H-Trust scheme, we conduct multi-agent based simulations. Simulation results demonstrate that H-Trust is robust and can aggregate cooperative groups in systems even when the majority of users are malicious.

Published in:

Distributed Computing Systems Workshops, 2008. ICDCS '08. 28th International Conference on

Date of Conference:

17-20 June 2008