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High-speed coherent optical encryption/decryption system based on cross-phase encoding.

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    This summary is machine-generated.

    This study introduces a novel all-optical logic gate encryption system for 5G networks. It enhances optical transmission security using phase encoding and physical-layer security, achieving 100 Gbps rates.

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    Area of Science:

    • Optical networking
    • Quantum cryptography
    • Information security

    Background:

    • 5G networks rely on optical infrastructure vulnerable to eavesdropping and quantum computing threats.
    • Traditional cryptography faces significant security challenges in advanced optical networks.
    • All-optical logic gate encryption offers a promising solution for enhancing optical layer security.

    Purpose of the Study:

    • To propose a high-speed coherent optical encryption and decryption system using all-optical logic gates.
    • To enhance transmission security in optical networks against emerging threats.
    • To improve the efficiency and reduce the complexity of optical encryption systems.

    Main Methods:

    • Development of a phase encoding and decoding scheme for two quadrature phase-shift keying (QPSK) signals.
    • Integration of physical-layer key distribution (PLKD) and physical-layer encryption (PLE).
    • Implementation of real-time signal processing in the all-optical domain.

    Main Results:

    • Doubled encryption and decryption efficiency through the proposed QPSK phase encoding scheme.
    • Reduced overall system complexity by integrating PLKD and PLE.
    • Achieved a single-wavelength communication rate of 100 Gbps for secure transmission.

    Conclusions:

    • The proposed system offers a feasible scheme for enhancing transmission security in wavelength division multiplexing (WDM) optical networks.
    • The system supports high speed, low latency, and high flexibility for secure optical communications.
    • Applicable to various phase-modulated signals, providing a versatile solution for optical network security.