IFIP International Conference on Trust Management

IFIPTM 2007: Trust Management pp 1-16

Private Distributed Scalar Product Protocol With Application To Privacy-Preserving Computation of Trust

  • Danfeng Yao
  • Roberto Tamassia
  • Seth Proctor
Conference paper

DOI: 10.1007/978-0-387-73655-6_1

Volume 238 of the book series IFIP International Federation for Information Processing (IFIPAICT)

Abstract

In this paper, we first present a private distributed scalar product protocol that can be used for obtaining trust values from private recommendations. Our protocol allows Alice to infer the trustworthiness of Bob based on what Alice’s friends think about Bob and Alice’s confidence in her friends. In addition, the private information of Alice and her friends are not revealed during the computation. We also propose a credential-based trust model where the trustworthiness of a user is computed based on his or her affiliations and role assignments. The trust model is simple to compute, yet it is scalable as it classifies large groups of users

Key words

Private multi-party computationtrust managementlocation privacy
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Copyright information

© International Federation for Information Processing 2007

Authors and Affiliations

  • Danfeng Yao
    • 1
  • Roberto Tamassia
    • 1
  • Seth Proctor
    • 2
  1. 1.Department of Computer ScienceBrown UniversityProvidenceUSA
  2. 2.Sun Microsystems LaboratoriesBurlington