The concept of legal liability and differences between liability in private, administrative and criminal law, criminal liability as ultima ratio, anomalies in the system of liability for personal data processing and cybersecurity incidents, detailed analysis of private law liability of ISPs and platform providers (incl. recent Czech and CJEU case-law), liability in cybersecurity law - liability of controllers, liability for incidents, prosecution and sanctioning by NCISA, liability in personal data protection, liability for computer crimes, liability of autonomous systems, concept of compliance, building compliance systems in middle and large enterprises, typical compliance tools.