The dynamic development of information technology has caused that man is becoming more and more dependent on computers and related devices. At the beginning of the 1980s computer was only a tool which main purpose was to perform complex scientific calculations or use in military purposes. Currently, the telecommunication devices accompany man in almost every aspect of life, starting with performing the work tasks, relaxation and maintaining contacts with friends. Information technology dominated the state management with its key elements, one of which is, among others, critical infrastructure. With the growing addiction of society from information technology, also threats from the attacks in cyberspace g...