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With the fast growing of electronic market, fraud has become a top barrier to e-commerce. Subsequently, online escrow service, such as Paypal and Zhifubao, provided by trusted third party (TTP) is considered as an effective method to protect the business from the fraud. However, who will supervise the fraud of the TTP? TTP takes charge of more and more money from buyers. Moral hazards from TTP, such...
Fraud detection has become a common concern of the online auction Web sites. Fraudsters often manipulate reputation systems and commit nondelivery fraud. To deal with fraud in group behavior we consider network level features, such as users' beliefs of other users. In this paper we use the loopy belief propagation algorithm and apply it to network level fraud detection, classifying fraudsters, accomplices,...
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