Abstract
In recent years, cyber-security of networked control systems has become crucial, as these systems are vulnerable to targeted cyber-attacks that compromise the stability, integrity and safety of these systems. In this work, secure and private communication links are established between sensor-controller and controller-actuator elements using semi-homomorphic encryption to ensure cyber-security in Model Predictive Control (MPC) of nonlinear systems. Specifically, Paillier Cryptosystem is implemented for encryption-decryption operations in the communication links. Cryptosystems, in general, work on a subset of integers. As a direct consequence of this nature of encryption algorithms, quantization errors arise in the closed-loop MPC of non-linear systems. Thus, the closed-loop encrypted MPC is designed with a certain degree of robustness to the quantization errors. Furthermore, the trade-off between the accuracy of the encrypted MPC and the computational cost is discussed. Finally, a multi-input multi-output continuous stirred tank reactor (CSTR) example is presented to demonstrate the implementation of the proposed encrypted MPC design.
| Original language | English |
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| Title of host publication | 2023 31st Mediterranean Conference on Control and Automation, MED 2023 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 904-911 |
| Number of pages | 8 |
| ISBN (Electronic) | 9798350315431 |
| DOIs | |
| State | Published - 2023 |
| Externally published | Yes |
| Event | 31st Mediterranean Conference on Control and Automation, MED 2023 - Limassol, Cyprus Duration: Jun 26 2023 → Jun 29 2023 |
Publication series
| Name | 2023 31st Mediterranean Conference on Control and Automation, MED 2023 |
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Conference
| Conference | 31st Mediterranean Conference on Control and Automation, MED 2023 |
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| Country/Territory | Cyprus |
| City | Limassol |
| Period | 06/26/23 → 06/29/23 |
Funding
Atharva V. Suryavanshi is with the Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095-1592, USA. Aisha Alnajdi is with the Department of Electrical and Computer Engineering, University of California, Los Angeles, CA 90095-1592, USA. Mohammed Alhajeri is with the Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095-1592, USA. Fahim Abdullah is with the Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095-1592, USA. Panagiotis D. Christofides is with the Department of Chemical and Biomolecular Engineering and the Department of Electrical and Computer Engineering, University of California, Los Angeles, CA 90095-1592, USA. Emails: [email protected], [email protected], [email protected], [email protected], [email protected]. Corresponding author: P. D. Christofides. Financial support from the National Science Foundation and the Department of Energy is gratefully acknowledged.