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Cyber Security for Discrete Event Systems

Raphael Fritz

ISBN 978-3-8325-5799-7
197 pages, year of publication: 2024
price: 41.50 €
Cyber Security for Discrete Event Systems
Cyber-physical systems are a crucial part of modern automation applications. These systems are widespread across the production industry and critical infrastructures where a high degree of security, reliability and availability is required. This work investigates possible defense mechanisms against attacks on cyber-physical systems modeled by networked discrete event systems. Based on a threat assessment, attack prevention, attack detection and localization, and attack recovery methods are proposed. The cyber attacks under consideration are stealthy attacks that actively hide their influence and are not detectable by conventional anomaly detection schemes. The attack prevention is based on a controller encryption scheme exploiting the use of homomorphic encryption. The attack detection and localization are realized by introducing unexpected behavior into the transmitted signals and analyzing the timing behavior. The attack recovery reconfigures the controller based on the information gained from the attack localization and Monte-Carlo Tree Search.

Raphael Fritz studied Business Management and Engineering in the field of Electrical Engineering at the Technische Universit├Ąt Kaiserslautern and received his B. Sc. degree in 2013 and his M. Sc. degree in 2016. After his graduation, Raphael Fritz joined the Institute of Automatic Control at the Technische Universit├Ąt Kaiserslautern under the supervision of Professor Zhang. His main field of research was modern control techniques for discrete event systems and cyber security for cyber-physical systems. Since March 2021, Raphael Fritz works as an Automation Security Engineer at the company BASF SE in Ludwigshafen, Germany.

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Keywords:
  • Security
  • Cyber-physical systems
  • Cyber security
  • Cyber attacks
  • Automation

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