In recent years, the information society is becoming more dependent on information and communication technology and is extremely vulnerable to cyber-attacks which may affect its functioning. The attackers are more professional than before and today cyber-attacks are sponsored from nonstate actors but also include state actors. Cyber-attacks can be used as a means of political and economic pressure and as an instrument of influence alongside the traditional means of military force. Therefore, during last few years, it has significantly increased the necessity of complex and effective approaches to the process of ensuring national cyber space security, including protection of national critical infrastructure, personal data, information qualified as state secret, combating cybercrime, by developing and implementing concepts, regulations, techniques, procedures and policies inside all relevant institutions, including private and public sectors.