Table 3 Index level description of social security level.

From: Security risk assessment of projects in high-risk areas based on attack-defense game model

Social security level

Index level

The proportion of major and malignant criminal cases in the host country is less than 10%

Low

The proportion of major and malignant criminal cases in the host country ranges from 10 to 30%

Medium

More than 30% of the country’s major and malignant criminal cases

High