What does system security mainly mean in computer security?

System security refers to the application of system security engineering and system security management methods in the system life cycle, identifying hidden dangers in the system, and taking effective control measures to minimize their risks, so that the system can achieve the best security level within the specified performance, time and cost range.

The basic principle of system safety is that the safety of a new system must be considered at the conception stage. The formulation and implementation of safety work plan (system safety activities) belongs to pre-analysis and pre-protection, which is completely different from the traditional thinking of post-analysis and accident experience accumulation. System security activities run through the whole system life cycle until the system is scrapped.

Extended data:

Complex systems are often composed of tens of millions of elements, which are connected in a very complicated relationship. In the process of being researched, manufactured or used, high energy is often involved, and small errors in the system will lead to catastrophic accidents. The security problem of large-scale complex system has attracted people's attention, so the theory and method of system security came into being.

According to the viewpoint of system security, there is nothing absolutely safe in the world, and any human activity has hidden danger factors. The potential risk factors that can cause accidents are called hazards, which are the failure of some things, human error, adverse environmental factors and so on. The possibility of personal injury or material loss caused by dangerous sources is called danger, which can be measured by the degree of danger.

Baidu Encyclopedia-System Security