Trust management and matchmaking system for multi-attribute reverse auctions

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Online auction frauds, representing the largest part of all Internet frauds, are on the rise because auctions are vulnerable to opportunistic behaviors. Thus, auctions are considered trust-critical systems. Trust is difficult to establish because transactions occur among complete strangers. Nowadays auctions are facing serious frauds including: bid shilling, sniping and shielding, auctioneer cheating, auctioneer-bidder cheating and lack of privacy of submitted bids especially the losing ones. Shilling and auctioneer cheating are the hardest types of frauds to detect. These problems, reported in existing auction houses, make auctions really unfair and unreliable. To increase trust in auctions and overcome the problems listed above, we want to develop a trustworthy online auction house for multi-attribute reverse auctions, i.e. in the context of competing sellers and multiple attributes to describe the products being auctioned. All existing work on trust management for auctions concerns forward auctions, i.e. with competing buyers, and price-only auctions which are simple and cannot be used in many real-world situations.