Auction system with privacy protection

摘要

Fairness is one of the most important parts in all kinds of auctions. The basic of the fairness is the confidentiality of the bids. Anyone except the bidder should not know the real value of his/her bid in the auction process. In this paper, an efficient scheme for the construction of first-price sealed-bid auction based on comparable encryption is proposed. In our scheme, the confidentiality of each bid is protected, and the winning bid cannot be faked. In addition, we reduce the communication round between the bidders and the auctioneer, only one round is needed. And we show that our scheme achieves the desired security requirements.