Abstract
In the age of Internet, the commodity transaction is characterized by some new forms, such as e-transaction, e-auction, etc. The advanced internet technology can bring us several convenience and economic benefits, but it also poses a lot of risks and hidden danger in online transaction. In the process of e-transaction or e-auction, the theft of personal private data is also increasing. In order to protect the privacy of bidders in electronic auctions, this paper proposes a blind aggregation signature scheme that can be applied to the blockchain-enabled electronic auctions. Combining the characteristics of blind signatures and aggregated signatures, this scheme ensures the privacy of bidders and allows the electronic auction system to generate only one blind aggregated signature, which makes the system more optimized. The smart contract is invoked as a trusted third party to build an electronic auction system to prevent malicious internal members from attacking by combining the blind aggregation signature scheme. The security analysis shows that the proposed scheme can provide security protection for the electronic auction system, such as anonymity and non-forgery. Meanwhile, in the performance, the proposal enjoys a higher improvement in computing speed, which confirms the applicability of blockchain technology in the field of electronic auction.