| 摘要 |
PURPOSE: A mobile coupon open market service method based on near field communication (NFC) is provided to enable a purchaser and a seller to confirm a use state of a coupon through real-time coupon transaction. CONSTITUTION: A seller terminal (30) registers a coupon which product information is set in a server (10). When provisional settlement for the coupon is performed in a purchaser terminal (20), the server transmits the coupon for a product and a first authentication key to the purchaser terminal. The seller terminal authenticates the coupon by comparing the first authentication key with a second authentication key (S180). When the coupon is authenticated, the seller terminal records use of the coupon (S195). The purchaser terminal receives an authentication message from the seller terminal and changes a state of the coupon (S190). [Reference numerals] (10) Server; (20) Purchaser terminal; (30) Seller terminal; (AA) Product information, target; (S110) Registration; (S120) Purchase information; (S140) Selection & payment; (S150) Discount coupon & a first authentication key; (S160) Purchase history & a second authentication key; (S170) Near field communication; (S180) First authentication key; (S190) Coupon disuse; (S195) Coupon state change |
