
How Secure Is Europe’s Rail System? A Systematic Cybersecurity Risk Analysis of the European Rail Traffic Management System (ERTMS)
The European Rail Traffic Management System (ERTMS) is designed to make Europe’s railways interoperable and safe. The system, which has been mandatory since 2002, combines standardized signaling, radio communication, and train control – but how well is it protected against cyberattacks? Using MoRA, our modular risk assessment approach, we systematically model the ERTMS and evaluate cybersecurity risks. We compare current and future configurations to identify the assets with the largest attack surface. Our overview of the entire system – from GSM-R, balises, FRMCS, ETCS levels, and ATO to key management – provides a concise preview of risk profiles and attack tree scenarios, and highlights practical countermeasures that significantly improve cybersecurity.




