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Open AccessArticle

A Data Secured Communication System Design Procedure with a Chaotic Carrier and Synergetic Observer

1
Institute for Computer Technologies and Information Security, Southern Federal University, Chekhova 2, Taganrog 347922, Russia
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JSC Scientific Design Bureau of Computing Systems, 1 Liniya 144-a, Taganrog 347936, Russia
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Department of Radio Engineering Systems, Saint Petersburg Electrotechnical University, Professora Popova 5, Saint Petersburg 197376, Russia
4
Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia
5
Science and Engineering Faculty, Queensland University of Technology (QUT), Gardens Point Campus, Brisbane, QLD 4001, Australia
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(3), 497; https://doi.org/10.3390/electronics9030497
Received: 7 February 2020 / Revised: 13 March 2020 / Accepted: 15 March 2020 / Published: 18 March 2020
(This article belongs to the Section Circuit and Signal Processing)
We have considered the problem of secure communication by means of chaotic carrier communication channels. Data protection is provided if the signal in the communication channel looks like a stochastic or noisy one, i.e., by the steganography property, and also by using advanced and secured approaches of mixing a useful signal into a chaotic carrier. The problem is to find effective and efficient techniques for useful signal reconstruction at the receiver side. We firstly use a synergetic nonlinear mathematical observer to recover the two useful signals transmitted simultaneously over a single communication channel. Compared to a known observer, the synergetic one operates with initial nonlinear models, i.e., it may be applied directly to chaotic systems. In that system structure, we consider the useful signals as unobservable variables and estimate them by the given model of a chaotic generator. A chaotic data transmission system with two channels is demonstrated; the presented mathematical procedure explains the steps of synergetic two-channel observer design. Computer simulation results prove the viability of our approach. The proposed data transmission scheme and the observer design procedure provide effective transmission and reconstruction of informational signals. Reconstruction error is up to approximately 25% but has a very short pulses shape and could be eliminated with further analog or digital filtering algorithms. As an example application, simulation of image transmission and recovery is demonstrated. The study’s results may be used as a basis for further research into secure data transmission system design. View Full-Text
Keywords: synergetic control theory; observer; dynamic chaos; secured communication; chaotic carrier; chaotic parameter nonlinear modulation synergetic control theory; observer; dynamic chaos; secured communication; chaotic carrier; chaotic parameter nonlinear modulation
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MDPI and ACS Style

Mushenko, A.; Dzuba, J.; Nekrasov, A.; Fidge, C. A Data Secured Communication System Design Procedure with a Chaotic Carrier and Synergetic Observer. Electronics 2020, 9, 497.

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