Cooperative peer groups in NICE

TitleCooperative peer groups in NICE
Publication TypeJournal Articles
Year of Publication2006
AuthorsSherwood R, Lee S, Bhattacharjee B
JournalComputer Networks
Pagination523 - 544
Date Published2006/03/15/
ISBN Number1389-1286
Keywordsdistributed algorithms, P2P, Reputation base trust

We present a distributed scheme for trust inference in peer-to-peer networks. Our work is in the context of the NICE system, which is a platform for implementing cooperative applications over the Internet. We describe a technique for efficiently storing user reputation information in a completely decentralized manner, and show how this information can be used to efficiently identify non-cooperative users in NICE. We present a simulation-based study of our algorithms, in which we show our scheme scales to thousands of users using modest amounts of storage, processing, and bandwidth at any individual node. Lastly we show that our scheme is robust and can form cooperative groups in systems where the vast majority of users are malicious.