The method and methodology of efficiency assessment of protection system of distributed information systems

The paper analyzes geographically distributed information systems from the point of view of IT infrastructure, information security systems. The key features are identified, the problems of creating information security systems are identified. On the basis of general criteria for evaluating information technologies, criteria for the cost of information security tools and the degree of neutralization of threats to information security, criteria for evaluating the effectiveness of information security systems of geographically distributed information systems are determined. The paper studies the existing methodologies for assessing the effectiveness of information security systems, identifies their main disadvantages. Based on the studies of the adaptive neuro-fuzzy inference system, a method and methodology for assessing the effectiveness of information security systems has been developed, which allows the most accurate performance assessment. For the ANFIS network used in the method, the best parameters are determined that give the minimum network error. The developed method and technique make it possible to assess the effectiveness of information security systems of geographically distributed information systems both at the stage of creating a system and in the process of its operation, which makes it possible to promptly and timely make changes to the information security system.