Review of network security risk assessment methods

The vulnerability of network or information system is the inherent reason for the existence of security risks and security risks. External threats exploit the vulnerability of the network or information system to launch attacks. Therefore, in the field of network security risk assessment technology, security vulnerability analysis takes an important position and is the basis for a network security risk assessment. This paper mainly reviews the research status of network security vulnerability analysis methods, network security quantitative evaluation method and real-time evaluation method of network security.