Abstract
Content pollution and free-riders are increasingly threatening the utility and dependability of modern peer-to-peer systems. One common defense against these threats is to maintain a reputation for each peer in the network based on its prior behavior and contributions, which can help other users make informed decisions about future transactions. However, most current reputation schemes for unstructured P2P systems are prone to attack and therefore not very reliable. In response, we propose a trustable, distributed, reputation-management scheme called Alliatrust to combat content pollution and free-riders. Alliatrust demonstrates resilience against collusion by malicious peers by elegantly managing distributed copies of reputation data on a few homologous peers. Simulations show that Alliatrust is able to reduce undesirable transfers of polluted resources to good peers by up to 70%, while decreasing the success of queries issued by malicious peers and free-riders.
This work is supported in part by the US National Science Foundation under grants CNS-0509480 and CCF-0429995, the US Department of Energy Early Career Principal Investigator Award DE-FG02-05ER25687, and a University of Nebraska-Lincoln Undergraduate Creative Activities & Research Experiences grant.
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Gerard, J., Cai, H., Wang, J. (2006). Alliatrust: A Trustable Reputation Management Scheme for Unstructured P2P Systems. In: Chung, YC., Moreira, J.E. (eds) Advances in Grid and Pervasive Computing. GPC 2006. Lecture Notes in Computer Science, vol 3947. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11745693_12
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DOI: https://doi.org/10.1007/11745693_12
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