Key words
secure communication systems, nonlinear dynamics, modeling, analysis.
articles
The author:
Gavrishev A. Published in
№ 5(77)
30 october 2018 year
Rubric: Models and Methods
Rubric: Models and Methods
Modeling and quantitative and qualitative analysis of common secure communication systems
In this paper, the author uses the software package ScicosLab to conduct experimental modeling
of common secure communication systems and their experimental analysis using known methods of
nonlinear dynamics (time and spectral diagrams, phase portraits, Hurst exponent, maximal Lyapunov
exponent, BDS-statistics). As a common secure communication systems was chosen as the communication
system based on direct spread spectrum communications, system on the basis of the noise signals,
the proposed Shagarova A. A., communication system based on chaotic masking and communication
system based on chaotic modulation, represented by apparatus for protection against imitation
of controlled objects with high structural security of carrier signals. As a result of researches it was
established that: BDS-statistics explicitly identifies communication systems on the basis of classical
approaches of formation of noise-like signals and their derivatives; communication systems on the
basis of classical approaches of formation of noise-like signals and their derivatives possess positive
maximal Lyapunov exponent and thus possess chaotic properties; the obtained quantitative values of
BDS-statistics, maximal Lyapunov exponent, the Hurst exponent indicate that communication systems
based on chaotic signals in general are more preferable for secure communication systems than
communication systems based on classical approaches to the formation of noise-like signals and their
derivatives; of the considered communication systems based on chaotic signals, the system based on
chaotic modulation is more preferable for secure communication systems, since it has the highest maximal
Lyapunov exponent, which is an indicator of greater protection against unauthorized access than
the considered analogues, as it is indicated by the obtained values of BDS-statistics.
