Digital transformation opens up many new opportunities, as it can radically change business models and processes. However, as digitalisation progresses, the complexity of IT systems and infrastructures also increases. In addition, the methods of professional attackers are becoming more sophisticated and the attack targets are becoming more and more lucrative, all of which leads to high losses for companies. For secure business operations, it is therefore crucial to counteract these increased risks and to design a secure and trustworthy IT. It is therefore necessary for every company to address the issue of cyber security and take preventive measures before it is too late.