Design and implementation of Smart Card COS

This paper designs and implements a Smart Card Operation System COS which accords with national and industry standards, possesses high security and good compatibility. Firstly, the hardware structure of Smart Card is introduced, then the architecture and work principle of Smart Card COS are explained, and the design and implementation of Smart Card COS is discussed from four function modules such as transmission management, command interpreter, security control and file management. Finally, an application instance - SIM card is given to show the application on Smart Card.