Abstract
A necessary condition for a self-synchronixing delayless invertible finite state machine (FSM) being a scrambler was conjectured in [1]. A counterexample to the conjecture is given in this paper.
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James I. Massey, Andres Gubser, Alfred Fischer, Peter Hochstrasser, Bruno Huber and Roland Sutter, A Self-Synchronizing Digital Scrambler for Cryptographic Protection of Data, 1984 International Zurich Seminar on Digital Communications.
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Bao, F. On the condition for FSM being a scrambler. J. of Comput. Sci. & Technol. 3, 70–74 (1988). https://doi.org/10.1007/BF02943333
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DOI: https://doi.org/10.1007/BF02943333