Accessibility: Authorized persons and transactions can access information systems and the information therein within the required time and quality, Critical infrastructures: The infrastructures which host the information systems that can cause, - Loss of lives, - Large scale economic damages, - Security vulnerabilities and disturbance of public order at national level when the confidentiality, integrity or accessibility of the information they process is compromised, Cyber security incident: Violation of confidentiality, integrity or accessibility of information systems or of the information being processed by these systems, Cyber security: Protection of information systems that make up the cyber space from attacks, ensuring the confidentiality, integrity and accessibility of the information being processed in this space, detection of attacks and cyber security incidents, putting into force the countermeasures against these incidents and then putting these systems back to their states previous to the cyber security incident. National Cyber Security: The cyber security of all services, processes and data –and the systems involved in provisioning of these- provided by the information and communication technologies in the national cyber space. National Cyber Security Strategy and 2013-2014 Action Plan 9/47