Security Analysis for CBTC Systems under Attack–Defense Confrontation

• DOI: 10.3390/electronics8090991
• Publication Date: 2019-09-06T06:59:22Z
• Authors: Wenhao Wu; Bing Bu
• Keywords: Stochastic Petri net; Seriousness; Security system

Communication-based train controls (CBTC) systems play a major role in urban rail transportation. As CBTC are no longer isolated from the outside world but use other networks to increase efficiency and improve productivity, they exposed huge cyber threats. This paper proposes generalized stochastic Petri net (GSPN) model capture dynamic interaction between attacker defender evaluate security of systems. Depending on characteristics system attack–defense methods, we divided our into two phases: penetration disruption. In each phase, provided effective means attack corresponding defensive measures, state was determined correspondingly. Additionally, semiphysical simulation platform game were proposed assist GSPN parameterization. With steady-state probability output model, propose several indicators for assessing security. Finally, compared with single measures multiple measures. Our evaluations indicated significance seriousness situation.