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Secure and private NOMA VLC using OFDM with two-level chaotic encryption.

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    This study introduces a secure and private visible light communication (VLC) system using non-orthogonal multiple access (NOMA). The system enhances security for legitimate users and ensures privacy among them, verified through experiments.

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    Area of Science:

    • Computer Science
    • Electrical Engineering
    • Cryptography

    Background:

    • Visible Light Communication (VLC) offers high bandwidth potential.
    • Non-Orthogonal Multiple Access (NOMA) enhances spectral efficiency in wireless systems.
    • Ensuring security and privacy in shared communication systems is a growing challenge.

    Purpose of the Study:

    • To propose and demonstrate a novel secure and private NOMA-based VLC system.
    • To enhance both user security against eavesdroppers and inter-user privacy.
    • To address the limitations of existing VLC systems regarding simultaneous security and privacy.

    Main Methods:

    • Utilizing Orthogonal Frequency Division Multiplexing (OFDM) modulation.
    • Implementing a two-level chaotic encryption scheme for data protection.
    • Conducting an experimental setup with legitimate users and an eavesdropper.

    Main Results:

    • Successful experimental verification of the proposed NOMA VLC system's feasibility.
    • Demonstrated simultaneous improvement in security and privacy.
    • Validation of the two-level chaotic encryption's effectiveness.

    Conclusions:

    • The proposed system effectively achieves secure and private communication in NOMA VLC networks.
    • This work represents a significant advancement in securing VLC systems.
    • The implemented encryption scheme provides robust protection for legitimate users and enhances privacy.