Mathematical model for quantitative assessment of the Security of open operating systems when selecting in the AS of the Internal Affairs Bodies

Objective. The article considers a mathematical model for quantitative assessment of the security of open operating systems (hereinafter referred to as OS) of automated systems of the internal affairs bodies of the Russian Federation (hereinafter referred to as AS OVD RF), developed based on the requirements of the standard GOST R ISO/IEC 15408. Method . The study was conducted based on the methods: analysis of possible threats to the security of open operating systems and the requirements of the standard GOST R ISO / IEC 15408, analysis of hierarchies and applications of fuzzy logic provisions. Result . The result of calculating the security indicator of the analyzed OS is a linguistic indicator of the degree of OS security and an OS security indicator expressed as a percentage. Conclusion. The authors propose a mathematical model for assessing the security of open operating systems when choosing them in the AS OVD RF.