Abstract: A method and a system wherein IC card information can be changed in either of two ways is provided. The information stored in an IC card can be changed independently of the information that a center facility maintains, and then the corresponding IC card information maintained by the center facility is updated to reflect the changes made in the IC card. Alternatively, the IC card information maintained in the center facility is changed, and then the corresponding information in the IC card is updated to reflect those changes.

Abstract: In accordance with the invention, a method and system is provided wherein IC card information can be changed in either of two ways: (1) the information stored in IC card is changed independently of the information that the center facility maintains, and then the corresponding IC card information maintained by the center facility is updated to reflect the changes made in the IC card, and (2) the IC card information maintained in the center apparatus is changed, and then the corresponding information in the IC card is updated to reflect the changes made in the center apparatus.

Abstract: A small-sized ID chip is attached onto an article, which may be imitated or counterfeited, such as an identify certificate and/or valuable securities, etc., for example. From the small-sized ID chip can be read out an ID through a readout device for exclusive use thereof, and is provided means for memorizing the ID of the small-sized ID chip in relation to information described on a certificate or the like, wherein the ID is read out from the small-sized ID chip attached thereon with using the readout device for exclusive use thereof, thereby to be compared with, by referring to the information in relation to that ID, when determination is made upon verification of the identify certificate, for example.

Abstract: In accordance with the invention, a method and system is provided wherein IC card information can be changed in either of two ways: (1) the information stored in IC card is changed independently of the information that the center facility maintains, and then the corresponding IC card information maintained by the center facility is updated to reflect the changes made in the IC card, and (2) the IC card information maintained in the center apparatus is changed, and then the corresponding information in the IC card is updated to reflect the changes made in the center apparatus.

Abstract: Information of credit cards from a plurality of card companies is previously stored in an IC card, and information of a member who possesses the IC card having a plurality of credit card functions is previously registered in a card company processor. When the IC card is used in a member shop, a terminal in the member shop identifies that the IC card has a plurality of credit card functions, and when carrying out the transaction between a customer and the member shop, establishes the connection to the card company processor. The card company processor establishes the communication with a card company processor specified by the customer. Accordingly, a plurality of credit card functions are provided in one IC card with a plurality of account numbers corresponding thereto.