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On the Output Redundancy of LTI Systems: A Geometric Approach With Application to Privacy

Yang, G. ORCID: 0000-0002-4826-6719, Gallo, A. J., Barboni, A. , Ferrari, R. M. G., Serrani, A. & Parisini, T. (2025). On the Output Redundancy of LTI Systems: A Geometric Approach With Application to Privacy. IEEE Transactions on Automatic Control, 70(11), pp. 7509-7522. doi: 10.1109/tac.2025.3579219

Abstract

This article examines the properties of output-redundant systems, that is, systems possessing a larger number of outputs than inputs, through the lense of the geometric approach of Wonham et al. We begin by formulating a simple output allocation synthesis problem, which involves “concealing” input information from a malicious eavesdropper having access to the system output, while still allowing for a legitimate user to reconstruct it. It is shown that the solvability of this problem requires the availability of a redundant set of outputs. This very problem is instrumental to unveiling the fundamental geometric properties of output-redundant systems, which form the basis for our subsequent constructions and results. As a direct application, we demonstrate how output allocation can be employed to effectively protect the input information from certain output eavesdroppers with guaranteed results.

Publication Type: Article
Additional Information: © 2025 The Authors. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. For more information, see https://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords: Redundancy, Resource management, Linear systems, Sensors, Vectors, Sensor systems, Taxonomy, Measurement, Eavesdropping, Control systems
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: School of Science & Technology
School of Science & Technology > Department of Computer Science
SWORD Depositor:
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