A Verifiable Sealed-Bid Multi-Qualitative-Attribute Based Auction Scheme in the Semi-Honest Model

Recently, several privacy-preserving auction schemes are proposed for protecting the bid privacy and securing the auction. In this paper, a sealed-bid auction scheme focusing on multi-attribute is presented. And it mainly concentrates on the security issues of multi-qualitative-attribute auction and utilizes the Pedersen commitment scheme to bind the bid information into commitment for strong bid privacy. In order to accomplish the public verifiable correctness, the buyers and sellers construct the zero-knowledge signatures of knowledge and publish them to the bulletin board. In accordance with the security analysis, major properties, strong bid privacy and public verifiability, are provided under the semi-honest model. According to a comparison of computation, the proposal's computation cost is reasonable.