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Secrecy performance analysis in the FSO communication system considering different eavesdropping scenarios.

Hongyu Wu, Dongpeng Kang, Junrong Ding

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    Summary
    This summary is machine-generated.

    This study numerically analyzes free-space optical (FSO) system secrecy performance under various eavesdropping scenarios. Results show atmospheric turbulence, pointing errors, and eavesdropper location significantly impact secrecy outage probability (SOP).

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    Area of Science:

    • Optical communications
    • Information security
    • Wireless communication systems

    Background:

    • Free-space optical (FSO) systems offer high bandwidth but are vulnerable to eavesdropping.
    • Atmospheric turbulence and pointing errors degrade FSO system performance and security.
    • Understanding eavesdropping scenarios is crucial for secure FSO system design.

    Purpose of the Study:

    • To numerically investigate the secrecy performance of FSO systems under three distinct eavesdropping scenarios.
    • To model atmospheric turbulence using the Málaga (M)-distribution, incorporating non-zero boresight pointing error and path loss.
    • To derive analytical and asymptotic expressions for secrecy outage probability (SOP).

    Main Methods:

    • Numerical simulations using Monte Carlo methods.
    • Development of novel probability density function (PDF) and cumulative distribution function (CDF) for the M-distribution channel.
    • Derivation of analytical expressions for SOP under high signal-to-noise ratio (SNR) conditions.

    Main Results:

    • The study provides novel PDF and CDF expressions for various eavesdropping configurations.
    • Analytical and asymptotic SOP expressions are derived for different scenarios.
    • Simulation results validate the derived expressions and highlight the impact of system parameters.

    Conclusions:

    • Eavesdropper location significantly influences FSO system secrecy performance.
    • Atmospheric turbulence and pointing errors are critical factors affecting SOP.
    • The findings provide valuable insights for enhancing the security of FSO communication systems.