Towards a new design of ciphers to secure CPS: the role of control theory

Among several solutions to face the unprecedented increase of attacks towards Cyber Physical Systems, encryption plays a central role. In the form of a Proof of Concept, this contribution gives a new methodology for designing self-synchronizing automata, having in mind their use in symmetric cryptog...

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Bibliographic Details
Published in:2022 26th International Conference on System Theory, Control and Computing (ICSTCC) pp. 13 - 18
Main Authors: Boukerrou, Hamid, Millerioux, Gilles, Minier, Marine
Format: Conference Proceeding
Language:English
Published: IEEE 19.10.2022
Subjects:
Automata
Ciphers
Control theory
Cyber-Physical Systems
Cybersecurity
Design methodology
Encryption
Flatness
Generators
LPV systems
Structural Analysis
Throughput
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Summary:Among several solutions to face the unprecedented increase of attacks towards Cyber Physical Systems, encryption plays a central role. In the form of a Proof of Concept, this contribution gives a new methodology for designing self-synchronizing automata, having in mind their use in symmetric cryptography, namely the Self-Synchronizing Stream Ciphers. The contribution of the paper is to recast the design as control theoretical issues. It calls for a graph-based approach and results borrowed from control theory and dynamical systems, in particular LPV systems. The design leads to not necessarily T -functions as state transition functions of the automata involved in the ciphering and deciphering sides. It is a consideration that is important for the sake of security. Another asset of the approach is that the resulting ciphers admit possibly vectorial inputs to enhance the throughput.
DOI:10.1109/ICSTCC55426.2022.9931873