| 摘要 |
When a user and a dealer agree to do a commercial transaction, if the password is input to a user's portable terminal (3), the password is converted to an authentication ID, and authentication is performed on the basis of the authentication ID. After authentication is successfully performed, the portable terminal sends credit information and the user number to a server (5) and the server stores the credit information and the user number. The dealer uses a dealer's terminal (6) to send the dealer number and the user number provided by the user to the server. The server compares the received user number and dealer number with those stored, and, only when matching is found, sends back the credit information to the dealer's terminal. The dealer's terminal performs a credit payment process on the basis of the received credit information. |
