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Secure free-space optical communication system based on data fragmentation multipath transmission technology.

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    This study introduces a secure free-space optical (S-FSO) communication system using data fragmentation multipath transmission (DFMT) to enhance FSO security. The DFMT scheme effectively protects data from eavesdropping by distributing fragments across multiple channels.

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    Area of Science:

    • Optical Communications
    • Information Security
    • Wireless Transmission

    Background:

    • Free-space optical (FSO) communication offers high bandwidth but faces security challenges against eavesdropping.
    • Existing FSO security measures are often complex or reduce transmission efficiency.
    • Data fragmentation and multipath transmission (DFMT) presents a novel approach to enhance FSO security.

    Purpose of the Study:

    • To propose and demonstrate a secure FSO communication system utilizing the DFMT scheme.
    • To evaluate the security enhancement and feasibility of DFMT in practical FSO links.
    • To analyze the theoretical security performance of the proposed S-FSO system.

    Main Methods:

    • Implementing a secure FSO system employing the DFMT scheme.
    • Conducting a field experiment with a 50m FSO link between two buildings.
    • Developing a theoretical model to analyze the system's security performance.

    Main Results:

    • Successful demonstration of the S-FSO communication system in a real-world field experiment.
    • Achieved a maximum throughput of 1 Gb/s over a 50m transmission distance.
    • Validated the effectiveness of the DFMT scheme in protecting confidential messages.

    Conclusions:

    • The DFMT scheme is a feasible and effective method for enhancing the security of FSO communications.
    • This work represents the first application of the DFMT scheme in FSO systems.
    • The developed S-FSO system provides a promising solution for secure wireless optical data transmission.