| 摘要 |
PROBLEM TO BE SOLVED: To allow plural companies, etc., to share customer information and to enable a customer to selectively disclose customer information. SOLUTION: The IC card is equipped with at least a microprocessor 11 and a memory 12, which is stored with pieces of property information regarding the customer. When the IC card is inserted into a customer information sharing terminal device 15 and a customer password is inputted, the microprocessor confirms that the customer password is a regular one. When the indication that property information selected among the pieces of property information is property information which can be disclosed is given to a previously selected company, a key is set for the property information which can be disclosed. Then thereafter, when the IC card is inserted into the customer information sharing terminal device and a customer password is inputted, the microprocessor sets the key corresponding to the previously selected company to on, on condition that the password is a regular one and the previously selected company is allowed to refer to the information, so that the property information corresponding to the key having been set on can be referred to. |
