What are the five levels of information security protection?

Hello, the security protection level of the level protection object is divided into five levels, which gradually increases from level one to level five.

The first level (self-protection level), after the object of level protection is destroyed, it will harm the legitimate rights and interests of citizens, legal persons and other organizations, but it will not harm national security, social order and public interests;

The second level (the level of guidance and protection), after the object of level protection is destroyed, it will cause serious damage to the legitimate rights and interests of citizens, legal persons and other organizations, or damage to social order and public interests, but it will not endanger national security;

The third level (the level of supervision and protection), after the object of protection is destroyed, it causes particularly serious damage to the legitimate rights and interests of citizens, legal persons and other organizations, or to social order and public interests, or to national security;

The fourth level (compulsory protection level), after the object of level protection is destroyed, it will cause particularly serious damage to social order and public interests, or cause serious damage to national security;

The fifth level (special control protection level), after the object of level protection is destroyed, it will cause particularly serious damage to national security.

Among them, the secondary and tertiary information systems are the most common, and the secondary and above information systems need to be protected at different levels, including grading, filing, rectification, evaluation, supervision and inspection.