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Multi scrolls chaotic encryption scheme for CO-OFDM-PON.

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    A new multi scrolls chaotic encryption method for CO-OFDM-PON offers enhanced security and lower complexity. This novel scheme improves bit error rate (BER) performance and significantly expands the key space compared to prior methods.

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    Area of Science:

    • Optoelectronics and Communications
    • Information Security
    • Applied Physics

    Background:

    • Passive optical networks (PONs) are crucial for broadband access.
    • Orthogonal frequency-division multiplexing (OFDM) is widely used in PONs.
    • Chaotic encryption offers a robust method for securing optical communications.

    Purpose of the Study:

    • To propose and demonstrate a novel multi scrolls chaotic encryption scheme for CO-OFDM-PON.
    • To analyze the encryption complexity and performance of the new scheme.
    • To compare the proposed scheme with existing hyper Chen chaotic encryption.

    Main Methods:

    • Development of a 3-dimension multi scrolls chaotic encryption algorithm.
    • Experimental demonstration of the encryption scheme in a CO-OFDM-PON.
    • Analysis of bit error rate (BER) and peak-to-average power ratio (PAPR).
    • Evaluation of encryption complexity and key space sensitivity.

    Main Results:

    • The proposed multi scrolls scheme achieves lower encryption complexity than the hyper Chen scheme.
    • It enables dynamic constellation point mapping for QAM signals.
    • The scheme demonstrates superior BER performance due to reduced PAPR in OFDM.
    • High sensitivity to initial secure keys (10^-17) and a 10^6 times larger key space.

    Conclusions:

    • The multi scrolls chaotic encryption scheme provides enhanced security and efficiency for CO-OFDM-PON.
    • It offers a significant improvement in key space and resistance to brute-force attacks.
    • The scheme is effective for secure data transmission, as verified by encrypted image transmission over 80 km SSMF.