MODERNIZATION OF THE PHYSICAL PROTECTION STRUCTURE OF CRITICALLY IMPORTANT INFORMATIZATION OBJECTS BASED ON THE SELECTION OF EFFECTIVE DECISIONS
The article deals with the modernization of the structure of physical protection by choosing effective solutions. A feature of the solution of the problem is the use of Markov circuits to model the functioning of physical protection and experiment theory in order to obtain an efficiency function to determine the rational version of modernization of the physical protection structure. Each perpetrator 's path and physical defense response to penetration was modeled by two information-linked Markov chains. The first chain is the intruder penetration path, the second chain is the physical protection response to penetration. An indicator of the effectiveness of physical protection is the probability of finding the information of a critical object in a safe state (probability of fulfilling the functional purpose of physical protection). A general assessment of the security of information was made based on the most pessimistic result of the physical protection response to the intruder 's penetration. An active factor experiment was conducted on the Markov model of physical protection functioning. The factors of the experiment are structural changes in engineering equipment for physical protection, aimed at improving the efficiency of information protection. According to the results of the factor experiment on the Markovsky model, the response function was obtained - the increment of the efficiency of physical protection to the cost of modernization costs. Based on the analysis of the obtained response function to achieve the maximum increment of the efficiency/cost function, the center of the experiment plan shifted towards the maximum function factor by an amount providing predetermined physical protection efficiency requirements. Thus, a mathematically sound way of structural modernization of physical protection is proposed, as well as parameters of structural modernization ensuring the required efficiency.