DK
Döme Kohlhéb
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Operational Technologies (OT) systems are industrial networked control systems, and they are often only equipped with conventional attack and fault detectors, which are vulnerable to intelligent false data injection. The thesis studies and demonstrates this problem, and proposes a solution of using Dynamic Event-Triggered Control (DETC) to construct a Message Authentication code (MAC) algorithm, to secure the system.
First OT systems are constructed with a simple plant, common controllers, state estimators and attack detectors. Based on the signal traffic of these systems along, intelligent attackers are constructed and trained to mimic the behaviour of the entire OT system. Given the learning is successful, the attacker destabilizes the plant without the detectors raising an alarm. By experimentation it is shown that construing said attackers, and this neural networks, is not only possible, but many different architectures produce positive results.
Secondly, due to the complex behaviour of event-triggered control a DETC based MAC is constructed. MAC algorithms map the massage and the secret key to a tag, which therefore authenticates not only the packet, but also the content of message. A DETC controlled, discrete, linear time-invariant system is simulated with the message acting as the external input, and the internal states, trigger threshold, and transition matrixes act as the key. The proposal of the thesis is that this process is hard to learn by message and tag data only. Two versions of the DETC MAC are constructed, one of them is a straightforward implementation of simulation, while the one uses established finite field operations to reduce computational expenses, while introducing more complexity. Even though the later translation doesn’t conserve the properties of DETC, early testing suggests it’s effective.
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First OT systems are constructed with a simple plant, common controllers, state estimators and attack detectors. Based on the signal traffic of these systems along, intelligent attackers are constructed and trained to mimic the behaviour of the entire OT system. Given the learning is successful, the attacker destabilizes the plant without the detectors raising an alarm. By experimentation it is shown that construing said attackers, and this neural networks, is not only possible, but many different architectures produce positive results.
Secondly, due to the complex behaviour of event-triggered control a DETC based MAC is constructed. MAC algorithms map the massage and the secret key to a tag, which therefore authenticates not only the packet, but also the content of message. A DETC controlled, discrete, linear time-invariant system is simulated with the message acting as the external input, and the internal states, trigger threshold, and transition matrixes act as the key. The proposal of the thesis is that this process is hard to learn by message and tag data only. Two versions of the DETC MAC are constructed, one of them is a straightforward implementation of simulation, while the one uses established finite field operations to reduce computational expenses, while introducing more complexity. Even though the later translation doesn’t conserve the properties of DETC, early testing suggests it’s effective.
...
Operational Technologies (OT) systems are industrial networked control systems, and they are often only equipped with conventional attack and fault detectors, which are vulnerable to intelligent false data injection. The thesis studies and demonstrates this problem, and proposes a solution of using Dynamic Event-Triggered Control (DETC) to construct a Message Authentication code (MAC) algorithm, to secure the system.
First OT systems are constructed with a simple plant, common controllers, state estimators and attack detectors. Based on the signal traffic of these systems along, intelligent attackers are constructed and trained to mimic the behaviour of the entire OT system. Given the learning is successful, the attacker destabilizes the plant without the detectors raising an alarm. By experimentation it is shown that construing said attackers, and this neural networks, is not only possible, but many different architectures produce positive results.
Secondly, due to the complex behaviour of event-triggered control a DETC based MAC is constructed. MAC algorithms map the massage and the secret key to a tag, which therefore authenticates not only the packet, but also the content of message. A DETC controlled, discrete, linear time-invariant system is simulated with the message acting as the external input, and the internal states, trigger threshold, and transition matrixes act as the key. The proposal of the thesis is that this process is hard to learn by message and tag data only. Two versions of the DETC MAC are constructed, one of them is a straightforward implementation of simulation, while the one uses established finite field operations to reduce computational expenses, while introducing more complexity. Even though the later translation doesn’t conserve the properties of DETC, early testing suggests it’s effective.
First OT systems are constructed with a simple plant, common controllers, state estimators and attack detectors. Based on the signal traffic of these systems along, intelligent attackers are constructed and trained to mimic the behaviour of the entire OT system. Given the learning is successful, the attacker destabilizes the plant without the detectors raising an alarm. By experimentation it is shown that construing said attackers, and this neural networks, is not only possible, but many different architectures produce positive results.
Secondly, due to the complex behaviour of event-triggered control a DETC based MAC is constructed. MAC algorithms map the massage and the secret key to a tag, which therefore authenticates not only the packet, but also the content of message. A DETC controlled, discrete, linear time-invariant system is simulated with the message acting as the external input, and the internal states, trigger threshold, and transition matrixes act as the key. The proposal of the thesis is that this process is hard to learn by message and tag data only. Two versions of the DETC MAC are constructed, one of them is a straightforward implementation of simulation, while the one uses established finite field operations to reduce computational expenses, while introducing more complexity. Even though the later translation doesn’t conserve the properties of DETC, early testing suggests it’s effective.
Bachelor thesis
(2023)
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J.S. Bogaert, F.R.G. Bononi Bello, G.W.A. van den Heuvel, A. Johary, Döme Kohlhéb, R. Teunissen, T.M. Trinh, T. Verhas, F.I. Vermeulen, C. van Zuylen, S.J. Watson, S.R. Turteltaub, V.O. Bonnin
The aim of this Design Synthesis Exercise was to design a floating large-scale wind farm of 1 GW in deep water using an Airborne Wind Energy System (AWES) that is cost-competitive, largely recyclable and uses less material than conventional wind turbines. By exploring the project foundation, carrying out an iterative single-system design process, and delving into the farm layout and management, this project assesses the feasibility of this novel concept. This report proposes an initial design with the resources currently available to the team while highlighting the next steps that need to be taken in order to pursue further design iterations, prototyping, and testing of this concept. This initial design, the tool developed to carry out the sizing, and a detailed reflection on the limitations of this design process and concept could be stated as the main contribution of this project to the field of airborne wind energy.
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The aim of this Design Synthesis Exercise was to design a floating large-scale wind farm of 1 GW in deep water using an Airborne Wind Energy System (AWES) that is cost-competitive, largely recyclable and uses less material than conventional wind turbines. By exploring the project foundation, carrying out an iterative single-system design process, and delving into the farm layout and management, this project assesses the feasibility of this novel concept. This report proposes an initial design with the resources currently available to the team while highlighting the next steps that need to be taken in order to pursue further design iterations, prototyping, and testing of this concept. This initial design, the tool developed to carry out the sizing, and a detailed reflection on the limitations of this design process and concept could be stated as the main contribution of this project to the field of airborne wind energy.