| 摘要 |
A Web server (12) includes a storage unit (201) that stores transaction relation information (218), transaction data requirement information (219, 220) that determines whether a reference authority is appended to a user for transaction data, and information (217) that identifies the user, associated with each other; and a control unit (200) that controls to receive the transaction data containing the transaction relation information, refer to the storage unit, extract user identification information for appending information indicating the transaction relation and the reference authority from the storage unit, when the storage unit stores the received transaction relation information and the received transaction data satisfies the transaction data requirement, and register the extracted information and information for identifying the transaction data in the database, from the user terminal, therefore, separate third parties can refer to every transaction data, even to the transaction data transmitted and received between the same transaction relations. |
