Electronic commerce fairness information processing method and system

The invention belongs to the technical field of digital commerce and information security, and discloses an electronic commerce fairness information processing method and system. According to the method and the system, four protocols of Order, Fulfill, Attest and Verify are included, and a newly designed password accumulator and a public display board based on Ethereum are used. According to Order and Fulfill protocols, a client, a supplier, a display board administrator and a gateway bank system interact in a safe and reliable mode to complete order generation, signature, verification and storage, so that price fairness authentication can be carried out in the future; according to Attest and Verify protocols, a customer and a display board administrator interact to complete membership certification and accurate cardinal number certification of a transaction, and price fairness is ensured. The invention ensures that the price is transparent, helps any customer or trusted third party to discover and prevent pr