Abstract:In consideration of limited defense resources, an idea based on zero sum game was proposed to solve the problem of risk assessment for terrorism attacks. With quantitative analysis, a damage probability model was used to make decisions for attack targets under the limited resources. By analyzing the calculation method of key parameters of the model, an optimal resource allocation scheme was achieved. Finally, taking the target for urban subway stations as an example, through risk level qualitative assessment of the stations, loss probabilities of each target were calculated and compared under different defense resources to determine the optimal resource allocation scheme. The results show that the proposed scheme is practical and effective.