Critical infrastructure modeling and simulation

Cybersecurity for critical infrastructures was not a priority all the time. At the beginning the focus was on other aspects of critical infrastructures like physical reliability and redundancy. Nowadays, however with the fast-growing digital world and the multitude of threats continuously evolving, cybersecurity became a top priority. The first part of the paper will present the critical sectors of modern society, the cyber security problem and the interdependencies that are between critical infrastructures. The second part illustrates how critical infrastructures can be modeled and simulated in order to better understand them and discover unknown vulnerabilities. Finally, the third part will have as purpose to analyze the sources of vulnerabilities, and to bring in our attention two models for increasing cybersecurity in infrastructures, used in present.