Evaluating transaction trust and risk levels in peer-to-peer e-commerce environments

  • Yan WangEmail author
  • Duncan S. Wong
  • Kwei-Jay Lin
  • Vijay Varadharajan
Original Article


Trust evaluation is critical to peer-to-peer (P2P) e-commerce environments. Traditionally the evaluation process is based on other peers' recommendations neglecting transaction amounts. This may lead to the bias in transaction trust evaluation and risk the new transaction. The weakness may be exploited by dishonest sellers to obtain good transaction reputation by selling cheap goods and then cheat buyers by selling expensive goods. In this paper we present a novel model for transaction trust evaluation, which differentiates transaction amounts when computing trust values. The trust evaluation is dependent on transaction history, the amounts of old transactions, and the amount of the new transaction. Therefore, the trust value can be taken as the risk indication of the forthcoming transaction and is valuable for the decision-making of buyers.


Trust evaluation E-commerce Risk level Peer-to-peer networks 



We thank the anonymous reviewers very much for their valuable suggestions.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Yan Wang
    • 1
    Email author
  • Duncan S. Wong
    • 2
  • Kwei-Jay Lin
    • 3
  • Vijay Varadharajan
    • 1
  1. 1.Department of ComputingMacquarie UniversitySydneyAustralia
  2. 2.Department of Computer ScienceCity University of Hong KongHong KongChina
  3. 3.Department of Electrical Engineering and Computer ScienceUniversity of California-IrvineIrvineUSA

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