Building risk models for describing security functions on protecting outer perimeters of the organization

The paper considers the problem of estimating the costs and losses associated with the degree of protection of the external perimeters of the object of protection against possible unauthorized actions, based on the construction of a mathematical model. Two main components related to the protection of objects have been identified: security service based on the activities of security groups; technical protection service based on the use of modern technical means of protection. The authors have obtained the relations for the average costs and losses associated with each of these services, as well as for the likelihood that the violator will be able to overcome the external perimeter of the object, despite attempts to counteract these services. New characteristics of the protection system have been introduced — indicators of reliability and qualifications of the security officer, which are taken into account in the assessment process. The possibility of using heuristic conclusions in the analysis of weakly structured characteristics, such as many of the probabilities associated with security actions, has been demonstrated. The obtained relationships can be used for setting and solving the problem of minimizing losses associated with providing security activity at the protection object to prevent malicious acts.