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Rule-based anomaly detection for railway signalling networks

Author

Listed:
  • Heinrich, Markus
  • Gölz, Arwed
  • Arul, Tolga
  • Katzenbeisser, Stefan

Abstract

We propose a rule-based anomaly detection system for railway signalling that mitigates attacks by a Dolev-Yao attacker who is able to inject control commands to perform semantic attacks by issuing licit but mistimed control messages. The system as well mitigates the effects of a signal box compromised by an attacker with the same effect. We consider an attacker that could cause train derailments and collisions, if our countermeasure is not employed. We apply safety principles of railway operation to create a distributed anomaly detection system that inspects incoming commands on the signals and points. The proposed anomaly detection system detects mistimed control messages against light signals, points and train detection systems that lead to derailments and collisions without producing false positives, while it requires only a small amount of overhead in terms of network communication and latency compared to normal train operation.

Suggested Citation

  • Heinrich, Markus & Gölz, Arwed & Arul, Tolga & Katzenbeisser, Stefan, 2023. "Rule-based anomaly detection for railway signalling networks," International Journal of Critical Infrastructure Protection, Elsevier, vol. 42(C).
    • Handle: RePEc:eee:ijocip:v:42:y:2023:i:c:s1874548223000161
    DOI: 10.1016/j.ijcip.2023.100603
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