Pilz. Systems are increasingly being networked due the digitisation of the factory. As a result, the risk of important data being spied out or manipulated also increases. In the past, communication in automation was primarily performed via fieldbuses such as CAN and proprietary, or in other words manufacturer- specific, protocols. In order to do any damage, an attacker would have to enter the factory hall or access a machine via a telephone line with a modem.