Team for Research in
Ubiquitous Secure Technology

Citation
Kevin Walsh and Emin Gun Sirer. "Evaluation of a Deployed, Distributed Object Reputation System for Peer-to-Peer Filesharing". In Proceedings of Networked System Design and Implementation, San Jose, California, May, 2006.

Abstract
In this paper, we describe Credence, a decentralized object reputation and ranking system for large-scale peerto- peer lesharing networks. Credence counteracts pollution in these networks by allowing honest peers to assess the authenticity of online content through secure tabulation and management of endorsements from other peers. Our system enables peers to learn relationships even in the absence of direct observations or interactions through a novel, ow-based trust computation to discover trustworthy peers. We have deployed Credence as an overlay on top of the Gnutella lesharing network, with more than 10,000 downloads of our client software to date. We describe the system design, our experience with its deployment, and results from a long-term study of the trust network built by users. Data from the live deployment shows that Credence's ow-based trust computation enables users to avoid undesirable content. Honest Credence clients can identify three quarters of the decoys encountered when querying the Gnutella network.

Electronic downloads

• credence.pdf · application/pdf · 347 kbytes

• HTML

  Kevin Walsh and Emin Gun Sirer. <a
  href="http://www.truststc.org/pubs/37.html"
  >Evaluation of a Deployed, Distributed Object Reputation
  System for Peer-to-Peer Filesharing</a>, In
  Proceedings of Networked System Design and Implementation,
  San Jose, California, May, 2006.

• Plain text

  Kevin Walsh and Emin Gun Sirer. "Evaluation of a
  Deployed, Distributed Object Reputation System for
  Peer-to-Peer Filesharing". In Proceedings of Networked
  System Design and Implementation, San Jose, California, May,
  2006.

• BibTeX

  @inproceedings{WalshSirer06_EvaluationOfDeployedDistributedObjectReputationSystem,
      author = {Kevin Walsh and Emin Gun Sirer},
      title = {Evaluation of a Deployed, Distributed Object
                Reputation System for Peer-to-Peer Filesharing},
      booktitle = {In Proceedings of Networked System Design and
                Implementation, San Jose, California},
      month = {May},
      year = {2006},
      abstract = {In this paper, we describe Credence, a
                decentralized object reputation and ranking system
                for large-scale peerto- peer lesharing networks.
                Credence counteracts pollution in these networks
                by allowing honest peers to assess the
                authenticity of online content through secure
                tabulation and management of endorsements from
                other peers. Our system enables peers to learn
                relationships even in the absence of direct
                observations or interactions through a novel,
                ow-based trust computation to discover
                trustworthy peers. We have deployed Credence as an
                overlay on top of the Gnutella lesharing network,
                with more than 10,000 downloads of our client
                software to date. We describe the system design,
                our experience with its deployment, and results
                from a long-term study of the trust network built
                by users. Data from the live deployment shows that
                Credence's ow-based trust computation enables
                users to avoid undesirable content. Honest
                Credence clients can identify three quarters of
                the decoys encountered when querying the Gnutella
                network.},
      URL = {http://www.truststc.org/pubs/37.html}
  }
  

Posted by Bill Hogan on 4 Apr 2006.
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