In the digital world, a significant part of the activity is transferred to the network. This applies to both the private and public spheres. Today, IT systems are responsible for the functioning of many sectors, including those that are of significant importance to the economy and ensuring state security. Performing tasks using cyberspace must be safe, which is why both public authorities and private entities (operators of key services, digital service providers) are obliged to protect the appropriate IT systems from cyber threats. It is also important to properly secure the critical infrastructure for which such systems are used