High-security ic card.

摘要

An IC card comprises a read-only memory (140) for storing an operation command therein, a reloadable memory (160) for storing a plurality of control commands therein, a selecting unit (162) for selecting the control command stored in the read-only memory and one of the control commands stored in the reloadable memory, and a control unit (130) for driving the IC card in accordance with the selected control commands. The IC card provides high security, and is capable of holding confidentiality of various commands stored therein. The IC card can be realised in a form which is adaptable to various application systems used for the IC card without rewriting the data in the read-only memory and can provide high general versatility. <IMAGE>