Improved first-price sealed auction method with comparable encryption

The invention discloses an improved first-price sealed auction method with comparable encryption. Based on comparable encryption and multi-linear mapping, a high-efficiency first-price sealed auction scheme is proposed, the communication round number between vendors and bidders is optimized, the workload for the bidders brought by the communication round number is greatly reduced, only a round of communication is needed between the vendors and the bidders, and all the safety requirements of the first-price sealed auction can be satisfied.