Smart card chip operating system (COS-Chip Operating System) refers to the system that is stored and run in the smart card chip to protect the confidentiality and integrity of application data or programs stored in non-volatile memory, and to control the smart card chip and external information. Embedded software for exchange purposes. The applicable product range is: (1) smart card COS using contact or/and non-contact working methods that follow the GB/T 16649:2006 (idt ISO/IEC 7816) standard instruction set; (2) other integrated or built-in COS (such as USBKey, etc.). The above-mentioned products intended to be used in confidential information systems shall be implemented in accordance with relevant national confidentiality regulations and standards, and this rule shall not apply.