A classified information system refers to a computer.

The confidential information system is composed of computer, network and other technologies.

Confidential information system refers to computers and information systems that handle important confidential information. Including national secret information system, secret information network system, military-related missile system, information system related to national secret scientific research projects, etc. Confidential information system is very important for information security. It not only contains important protected information, but also may be stolen, tampered with and leaked by criminals.

Secret-related information system is the foundation and key system in the field of information security, which is very important for safeguarding the fundamental interests of the country and the people and maintaining information security.