Faults and Cyber Attacks Detection in Critical

europa.eu Abstract. The explosive growth of the Internet has introduced ad-vanced services facilitating our every day life. On the other hand it cre-ated increased dependence on computer systems which may be seen as an additional source of vulnerability to disruption scenarios due to both physical and cyber-based incidents. In this paper we study the case of Critical Infrastructures (CIs), and especially power grid systems, which is one of the variety of services that nowadays relies on computers and the Internet for its operation. We design an experimental platform consist-ing of a power grid simulator and a cyber network emulator. This paper proposes a combinatorial method for automatic detection and classifi-cation of faults and cyber-attacks occurring on the power grid system when there is limited data from the power grid nodes due to cyber im-plications. The efficiency of the proposed method is demonstrated via an extensive experimental phase measuring the false positive rate, false negative rate and the delay of the detections