1 Introduction In modern world, the use of information systems and networks is constantly increasing, and therefore the importance of these systems for the successful development of economic and noncommercial activities, as well as the life and welfare of the society as a whole, is also increasing. Network and information security contributes to strengthening important societal values and objectives in the society, such as human rights and fundamental freedoms, democracy, the rule of law, and economic and political stability. On the one hand, the increasingly rapid development of information and communication technologies (ICT) brings benefits to modern society, while on the other it gives rise to ever new and technologically more sophisticated cyber threats. The trend in the use of ICT for political, economic and military supremacy is becoming more and more pronounced. Undoubtedly, cyber attacks are among the most significant security threats to the modern world, and therefore, cyber security has become an important, integral part of national security. In order to strengthen the cyber security assurance system, the state is encouraged and bound to adopt strategic documents at the national and international levels. This issue is addressed in the Resolution on the National Security Strategy of the Republic of Slovenia1, the Cyber Security Strategy of the European Union "Open, safe and secure cyberspace"2, and Draft Directive on measures to ensure a common high level of network and information security across the Union3. This strategy will help Slovenia define its measures for establishing a national cyber security system that will facilitate a rapid response to security threats and will serve to effectively protect the ICT infrastructure and information systems, thus ensuring the continuous operation of both public and private sectors, and, in particular, the key functions of the state and society in all security situations. Ensuring the security of cyberspace4 will be balanced with the interests of ensuring safety and economic viability as well as human rights and fundamental freedoms. 1 Resolution on National Security Strategy of the Republic of Slovenia. Uradni list RS (online), 2010, No. 27/2010, point 5.3.5 Responding to cyber threats and misuse of information technologies and systems. Available at: https://www.uradnilist.si/1/content? id=97018. 2 Cyber security Strategy of the European Union: An Open, Safe and Secure Cyberspace. Digital Agenda for Europe - A Europe 2020 Initiative [online], 2013. Available at: http://ec.europa.eu/digital-agenda/en/news/eu-cyber security-planprotect-open-internet-and-online-freedom-and-opportunity-cyber-security 3 Proposal for a Directive of the European Parliament and of the Council concerning measures to ensure a high common level of network and information security across the Union. Digital Agenda for Europe - A Europe 2020 Initiative [online], 2013. Available at: http://ec.europa.eu/digital-agenda/en/news/eu-cyber security-plan-protect-open-internet-and-onlinefreedom-and-opportunity-cyber-security 4 The term cyberspace covers the information technology network, telecommunication networks and computer processing systems. Cyber Security Strategy 3