Cooperative peer groups in NICE

  • Authors:
  • Rob Sherwood;Seungjoon Lee;Bobby Bhattacharjee

  • Affiliations:
  • Computer Science Department, University of Maryland, College Park, MD 20742, United States;Computer Science Department, University of Maryland, College Park, MD 20742, United States;Computer Science Department, University of Maryland, College Park, MD 20742, United States

  • Venue:
  • Computer Networks: The International Journal of Computer and Telecommunications Networking - Management in peer-to-peer systems
  • Year:
  • 2006

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Abstract

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.