Patent ID: 6934842

Claim:
An ID code management method for managing an ID code using an ID code management system including an ID code order receiving terminal for receiving an order for issue of an ID code, a production factory terminal for producing an identification tag storing said ID code, and an ID code management terminal connected to said ID code order receiving terminal and said production factory terminal through a network, said identification tag having mounted thereon an electronic circuit chip with data capable of being read from an external source, said electronic circuit chip having a read-only storage area for storing externally readable data constituting an extension ID code including an ordered ID code, attribute information and a message authentication code of the ID code, said method comprising the steps of: an order receiving ID code registration step in which in the case where an order receiving ID code registration request including said extension ID code is sent to said ID code management terminal from said ID code order receiving terminal, said extension ID code is registered in a data base of said ID code management terminal as already registered; and a produced ID code registration step in which in the case where a produced ID code registration request including said extension ID code stored in said produced identification tag is sent from said production factory terminal to said ID code management terminal, said identification tag storing said extension ID code is registered in said data base of said ID code management terminal as already produced.