Hybrid Design of Multiplicative Watermarking for Defense Against Malicious Parameter Identification

• URL: http://arxiv.org/abs/2309.02385v1
• Date: Tue, 5 Sep 2023 16:56:53 GMT
• Title: Hybrid Design of Multiplicative Watermarking for Defense Against Malicious Parameter Identification
• Authors: Jiaxuan Zhang, Alexander J. Gallo, Riccardo M. G. Ferrari,
• Abstract summary: We propose a hybrid multiplicative watermarking scheme, where the watermark parameters are periodically updated. We show that the proposed approach makes it difficult for an eavesdropper to reconstruct the watermarking parameters.
• Score: 46.27328641616778
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Watermarking is a promising active diagnosis technique for detection of highly sophisticated attacks, but is vulnerable to malicious agents that use eavesdropped data to identify and then remove or replicate the watermark. In this work, we propose a hybrid multiplicative watermarking (HMWM) scheme, where the watermark parameters are periodically updated, following the dynamics of the unobservable states of specifically designed piecewise affine (PWA) hybrid systems. We provide a theoretical analysis of the effects of this scheme on the closed-loop performance, and prove that stability properties are preserved. Additionally, we show that the proposed approach makes it difficult for an eavesdropper to reconstruct the watermarking parameters, both in terms of the associated computational complexity and from a systems theoretic perspective.

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