A framework for public-channel cryptography using chaotic lasers
Noam Gross, Einat Klein, Michael Rosenbluh, Wolfgang Kinzel, Lev Khaykovich, Ido Kanter
Abstract
Two mutually coupled chaotic diode lasers with individual external feedback, are shown to establish chaos synchronization in the low-frequency fluctuations regime. A third laser with identical external feedback but coupled unidirectionally to one of the pair does not synchronize. Both experiments and simulations reveal the existence of a window of parameters for which synchronization by mutual coupling is possible but synchronization by unidirectional coupling is not. This parameter space forms the basis of a proposed public-channel cryptographic scheme and is robust to various possible attacks.
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