| With the development of Internet application, electronic auction is surging in many ways. Electronic bidding system is used in many fields, such as auction, bid, and so on. But along with the development of the Internet community, spontaneous auction activity among community members is becoming more and more frequent, and the activity has a more flexible, faster and more privacy features. The traditional electronic auction will be safety and fairness is based on the basic knowledge of the trusted third party. It’s easy to cause the user bid information leakage. This may result in the user’s privacy, sellers users malicious bounty, and auction seconds kill behavior of users.In this paper, based on confidential multi-party computation and bit commitment technology, this paper proposes a only need buyers and sellers to participate in, price bidding scheme without a third party. Using confidential multi-party computation technology in the system, ensure the bidding both sides by a third party, not directly send each other bidding information, without knowing each others bid than size, complete the transaction. Bid, as a result of the auction house did not know that the user may offer to leak problem, so as to ensure the privacy of users. Auctions are both don’t know the other bids, thus greatly affect the accuracy of a last minute bid, can effectively inhibit "seconds and kill" behavior. In addition, by setting a single wheel challenge limit, to prevent the seller through several rounds tries to analyze the bidder quotation, which greatly limits the seller malicious bounty behavior. The system USES SQL Server 2008 to establish a database on the Server used to store the registered users and items of information; Using lightweight SQLite database engine to create client database, storage for bid information; Using Visual Studio 2013 as function of client and server development tools for the bidding system of user information management, sales information management, bid management and results release, and other functions for implementation, and its main functions were tested. |
