With the digitization in industry, information technologies are an important building block in production and are being used e.g. for the creation of a digital twin. However, if IT is used to network the productionmachines with each other and with the Internet, the system must be intelligent protected against cyber-attacks in order to avoid significant damage due to security gaps and attacks on the IT infrastructure. Several Fraunhofer Institutes are active in the field of cyber security and enable companies to recognize their own IT security level and develop specific security solutions in cooperation with the respective company.