ABSTRACT
The rapid technological development after World War II and, in particular, the arrival of information technology (IT), has had a major impact on the way society functions. Society has become increasingly dependent on these infrastructures. IT contributed to enhancing the efficiency of managing these infrastructures and played a pivotal role in interconnecting them. This chapter explains the description of state of the art in the field of the complex networks forming critical infrastructure (CI) of the state, problems and approaches to solve them from safety and security point of view. Accordingly, the CI should be viewed as an interaction between three principal stakeholders: CI owners/operators, public administration, and the public. The resilience of elements in a CI system lies in two basic areas, the first of which involves the technological and physical protection of individual elements. This type of resilience, known as technical resilience, is determined by the robustness and recoverability of system elements.
