Modeling Trust for Users and Agents in Ubiquitous Computing

Conference paper
Part of the Informatik aktuell book series (INFORMAT)


Finding reliable partners for interactions is one of the challenges in ubiquitous computing and P2P systems. We believe, that this problem can be solved by assigning trust values to entities and allowing them to state opinions about the trustworthiness of others. In this paper, we introduce our vision of trust-aided computing, and we present a trust model, called CertainTrust, which can easily be interpreted and adjusted by users and software agents. A key feature of CertainTrust is that it is capable of expressing the certainty of a trust opinion depending on the context of use. We show how trust can be expressed using different representations (one for users and one for software agents) and present an automatic mapping to change between the representations.


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  1. 1.
    B. Bhargava, L. Lilien, A. Rosenthal, and M. Winslet. Pervasive Trust. IEEE Intelligent Systems, 19(5):74–88, 2004.CrossRefGoogle Scholar
  2. 2.
    V. Cahill et al. Using Trust for Secure Collaboration in Uncertain Environments. IEEE Pervasive Computing, 2/3:52–61, July 2003.CrossRefGoogle Scholar
  3. 3.
    M. Carbone, M. Nielsen, and V. Sassone. A Formal Model for Trust in Dynamic Networks. In Proc. of IEEE Int. Conf. on Software Engineering and Formal Methods, Brisbane, Australia, September 2003. IEEE Computer Society.Google Scholar
  4. 4.
    J. Golbeck. Computing and Applying Trust in Web-Based Social Networks. PhD thesis, University of Maryland, College Park, 2005.Google Scholar
  5. 5.
    T. Grandison. Trust Management for Internet Applications. PhD thesis, Imperial College London, 2003.Google Scholar
  6. 6.
    A. Jøsang. A Logic for Uncertain Probabilities. International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, 9(3):279–212, 2001.zbMATHMathSciNetGoogle Scholar
  7. 7.
    A. Jøsang and R. Ismail. The Beta Reputation System. In Proceedings of the 15th Bled Conf. on Electronic Commerce, June 2002.Google Scholar
  8. 8.
    A. Jøsang, R. Ismail, and C. Boyd. A Survey of Trust and Reputation Systems for Online Service Provision. In Decision Support Systems, 2005.Google Scholar
  9. 9.
    S. D. Kamvar, M. T. Schlosser, and H. Garcia-Molina. The Eigentrust Algorithm for Reputation Management in P2P Networks. In Proc. of the 12th Int. Conf. on World Wide Web, pages 640–651, New York, USA, 2003. ACM Press.Google Scholar
  10. 10.
    L. Mui et al. A Computational Model of Trust and Reputation for e-Businesses. In Proceedings of the 35th HICSS, 2002. IEEE Computer Society.Google Scholar
  11. 11.
    S. Ries, J. Kangasharju, and M. Mühlhäuser. A Classification of Trust Systems. In On the Move to Meaningful Internet Systems 2006: OTM Workshops, pages 894–903, Montpellier, France, 2006.Google Scholar
  12. 12.
    J. Sabater and C. Sierra. Reputation and Social Network Analysis in Multi-Agent Systems. In Proceedings of the 1st Int. Joint Conf. on Autonomous Agents and Multiagent Systems, pages 475–482, New York, NY, USA, 2002. ACM Press.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  1. 1.Department of Computer ScienceDarmstadt University of TechnologyDarmstadtGermany

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