Prus R. The methods and models of dynamic resource control in information security

The thesis is dedicated to solving theoretical and practical problems of generation efficient information security systems. Research has as its object increasing information security indices by optimal use of resources. Pursuing objective mathematical model of multilevel multibarrier information security systems is developed and studied; the model enables to optimize the use of resources in systems which differ in quantity of objects, placement of obstacles, vulnerability, and information distribution between the objects with different ratio of attack and defense resources. Conditions of saddle point existence of objective function are examined; saddle point existence intervals of values relative amount of resources in complicated systems, which differ in structure, number of objects, information distribution between the objects, their vulnerability, are calculated. Using mentioned model method of testing in dynamic mode of complex confrontation when each of the sides attempts both to defense his information and to get his opponent's information. The method of determining time dependence of competitive sides' information balance in permanent attempts to get information, which based on Markov chains, is devised. System designs are provided, on base of which recommendations for software devising are made.