Team for Research in
Ubiquitous Secure Technology

Experience with an Object Reputation System for Peer-to-Peer Filesharing
Kevin Walsh, Emin Gun Sirer

Citation
Kevin Walsh, Emin Gun Sirer. "Experience with an Object Reputation System for Peer-to-Peer Filesharing". Proceedings of Networked System Design and Implementation (NSDI), Networked System Design and Implementation (NSDI), 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

Citation formats  
  • HTML
    Kevin Walsh, Emin Gun Sirer. <a
    href="http://www.truststc.org/pubs/173.html"
    >Experience with an Object Reputation System for
    Peer-to-Peer Filesharing</a>, Proceedings of Networked
    System Design and Implementation (NSDI), Networked System
    Design and Implementation (NSDI), May, 2006.
  • Plain text
    Kevin Walsh, Emin Gun Sirer. "Experience with an Object
    Reputation System for Peer-to-Peer Filesharing".
    Proceedings of Networked System Design and Implementation
    (NSDI), Networked System Design and Implementation (NSDI),
    May, 2006.
  • BibTeX
    @inproceedings{WalshSirer06_ExperienceWithObjectReputationSystemForPeertoPeerFilesharing,
        author = {Kevin Walsh and Emin Gun Sirer},
        title = {Experience with an Object Reputation System for
                  Peer-to-Peer Filesharing},
        booktitle = {Proceedings of Networked System Design and
                  Implementation (NSDI)},
        organization = {Networked System Design and Implementation (NSDI)},
        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/173.html}
    }
    

Posted by Kelly Patwell on 13 Feb 2007.
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