DETERMINATION OF OPTIMAL PARAMETERS FOR CONFIGURING INFORMATION SYSTEMS IN THE CONDITIONS OF NETWORK INTELLIGENCE
Research objective: to improve the information systems security against network reconnaissance.Methods used: in order to achieve the goal of the research, the methods of mathematical statistics and random processes study were used.Research result: the task of determining the optimal frequency of dynamic configuration of the information system’s structural and functional characteristics at each stage of network reconnaissance, taking into account the requirements for the minimum use of resource capabilities and ensuring a given value of the probability of disclosure of true values of the characteristics of the protected object was solved. The process of network reconnaissance and counteraction is formalized in the form of a Markov random process with discrete states and continuous time. Based on considerations of stability of information exchange between nodes of information system and capabilities of network reconnaissance, the maximum values of time intervals of dynamic configuration of structural and functional characteristics are determined. The obtained values of the optimal and maximum allowable frequency of dynamic configuration allow to estimate the time of disclosure of information system at given intensities of network scanning by reconnaissance tools. The results allow to provide a given level of protection of information system and the stability of its information exchange at the expense of the optimal frequency of dynamic configuration of its structural and functional characteristics.Scientific novelty: solving the problem of scalar optimization of the frequency of con guration of the structural and functional characteristics of the information system under conditions of network reconnaissance using the mathematical apparatus of semi-Markov random processes.