Doctoral Dissertations
Abstract
"Cyber-physical critical infrastructures are created when traditional physical infrastructure is supplemented with advanced monitoring, control, computing, and communication capability. More intelligent decision support and improved efficacy, dependability, and security are expected. Quantitative models and evaluation methods are required for determining the extent to which a cyber-physical infrastructure improves on its physical predecessors. It is essential that these models reflect both cyber and physical aspects of operation and failure. In this dissertation, we propose quantitative models for dependability attributes, in particular, survivability, of cyber-physical systems. Any malfunction or security breach, whether cyber or physical, that causes the system operation to depart from specifications will affect these dependability attributes. Our focus is on data corruption, which compromises decision support -- the fundamental role played by cyber infrastructure. The first research contribution of this work is a Petri net model for information exchange in cyber-physical systems, which facilitates i) evaluation of the extent of data corruption at a given time, and ii) illuminates the service degradation caused by propagation of corrupt data through the cyber infrastructure. In the second research contribution, we propose metrics and an evaluation method for survivability, which captures the extent of functionality retained by a system after a disruptive event. We illustrate the application of our methods through case studies on smart grids, intelligent water distribution networks, and intelligent transportation systems. Data, cyber infrastructure, and intelligent control are part and parcel of nearly every critical infrastructure that underpins daily life in developed countries. Our work provides means for quantifying and predicting the service degradation caused when cyber infrastructure fails to serve its intended purpose. It can also serve as the foundation for efforts to fortify critical systems and mitigate inevitable failures"--Abstract, page iii.
Advisor(s)
Sedigh, Sahra
Hurson, A. R.
Committee Member(s)
Choi, Minsu
Wunsch, Donald C.
Gosavi, Abhijit
Department(s)
Electrical and Computer Engineering
Degree Name
Ph. D. in Computer Engineering
Publisher
Missouri University of Science and Technology
Publication Date
Summer 2017
Pagination
xi, 104 pages
Note about bibliography
Includes bibliographic references (pages 92-103).
Rights
© 2017 Mark James Woodard, All rights reserved.
Document Type
Dissertation - Open Access
File Type
text
Language
English
Thesis Number
T 11579
Electronic OCLC #
1105575705
Recommended Citation
Woodard, Mark James, "Survivability modeling for cyber-physical systems subject to data corruption" (2017). Doctoral Dissertations. 2769.
https://scholarsmine.mst.edu/doctoral_dissertations/2769