Abstract
We propose a novel watermarking scheme by modifying a self-triggered control (STC) policy, aimed at detecting replay attacks for linear time-invariant (LTI) systems. We show that by employing non-deterministic early triggering of the STC mechanism, replay attacks can be detected by a modified χ2 detector which takes into account the aperiodic nature of the inter-sample times. Specifically, we consider the case where a periodic reference signal is tracked, which makes these systems vulnerable to replay attacks. The proposed approach is modular and can be retrofitted to legacy systems. An approach for designing an online optimal early triggering mechanism is provided. This is validated through an illustrative numerical example in which we compare our method to scenarios employing both additive and multiplicative watermarking.
| Original language | English |
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| Title of host publication | Proceedings of the IEEE 63rd Conference on Decision and Control, CDC 2024 |
| Publisher | IEEE |
| Pages | 4568-4573 |
| Number of pages | 6 |
| ISBN (Electronic) | 979-8-3503-1633-9 |
| DOIs | |
| Publication status | Published - 2025 |
| Event | 63rd IEEE Conference on Decision and Control, CDC 2024 - Milan, Italy Duration: 16 Dec 2024 → 19 Dec 2024 |
Publication series
| Name | Proceedings of the IEEE Conference on Decision and Control |
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| ISSN (Print) | 0743-1546 |
| ISSN (Electronic) | 2576-2370 |
Conference
| Conference | 63rd IEEE Conference on Decision and Control, CDC 2024 |
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| Country/Territory | Italy |
| City | Milan |
| Period | 16/12/24 → 19/12/24 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Keywords
- Linear systems
- Additives
- Watermarking
- Detectors
- Aging