A Modified Layer of Protection Analysis for Cyber-Physical Systems Security
Author | Tantawy, Ashraf |
Author | Erradi, Abdelkarim |
Author | Abdelwahed, Sherif |
Available date | 2023-04-10T09:10:06Z |
Publication Date | 2019 |
Publication Name | 2019 4th International Conference on System Reliability and Safety, ICSRS 2019 |
Resource | Scopus |
Abstract | Layer of Protection Analysis (LOPA) is the most commonly used approach for quantitative safety risk assessment in the process control industry to protect a Cyber- Physical System (CPS) from accidental hazards-causing failures. The LOPA approach does not take into account failures due to intentional security attacks, hence yielding partially-protected systems. With security breaches on the rise for critical infrastructure, the LOPA methodology needs to be revisited to verify its underlying assumptions and synchronize safety and security lifecycles. In this paper, we study the LOPA methodology and identify the key mathematical assumptions that are violated in the presence of security attacks. We present a mathematical formulation for a modified LOPA to incorporate the probability of a security attack on a CPS and apply it to a testbed case study. 2019 IEEE. |
Sponsor | This research was made possible by NPRP 9-005-1-002 grant from the Qatar National Research Fund (a member of The Qatar Foundation). The statements made herein are solely the responsibility of the authors. |
Language | en |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Subject | CPS Cyber Physical System HAZOP IEC 61511 LOPA Risk Assessment Safety SCADA Security SIL SIS |
Type | Conference Paper |
Pagination | 94-101 |
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Computer Science & Engineering [2288 items ]