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Non-triangular self-synchronizing stream ciphers

Abstract : In this paper, we propose an instantiation, called \textsf{Stanislas}, of a dedicated Self-Synchronizing Stream Cipher (SSSC) involving an automaton with finite input memory using non-triangular state transition functions. Previous existing SSSC are based on automata with shifts or triangular functions (T-functions) as state transition functions. Our algorithm Stanislas admits a matrix representation deduced from a general and systematic methodology called Linear Parameter Varying (LPV). This particular representation comes from the automatic theory and from a special property of dynamical systems called flatness.
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Contributor : Gilles Millerioux <>
Submitted on : Friday, December 18, 2020 - 12:01:10 PM
Last modification on : Wednesday, December 23, 2020 - 5:00:50 PM



Julien Francq, Loic Besson, Paul Huynh, Philippe Guillot, Gilles Millérioux, et al.. Non-triangular self-synchronizing stream ciphers. IEEE Transactions on Computers, Institute of Electrical and Electronics Engineers, In press, pp.Early access. ⟨10.1109/TC.2020.3043714⟩. ⟨hal-03081725⟩



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