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AuthorTantawy, Ashraf
AuthorErradi, Abdelkarim
AuthorAbdelwahed, Sherif
Available date2023-04-10T09:10:06Z
Publication Date2019
Publication Name2019 4th International Conference on System Reliability and Safety, ICSRS 2019
ResourceScopus
URIhttp://dx.doi.org/10.1109/ICSRS48664.2019.8987635
URIhttp://hdl.handle.net/10576/41835
AbstractLayer 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.
SponsorThis 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.
Languageen
PublisherInstitute of Electrical and Electronics Engineers Inc.
SubjectCPS
Cyber Physical System
HAZOP
IEC 61511
LOPA
Risk Assessment
Safety
SCADA
Security
SIL
SIS
TitleA Modified Layer of Protection Analysis for Cyber-Physical Systems Security
TypeConference Paper
Pagination94-101
dc.accessType Abstract Only


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