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Compressive sensing chaotic encryption algorithms for OFDM-PON data transmission.

Tingwei Wu, Chongfu Zhang, Yuhang Chen

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    We developed chaotic compressive sensing (CS) encryption for orthogonal frequency division multiplexing passive optical networks (OFDM-PON). This method compresses data and enhances security by using a 2D logistic-sine-coupling map and discrete cosine transform.

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    Area of Science:

    • Optical Network Security
    • Data Compression Algorithms
    • Applied Cryptography

    Background:

    • Orthogonal frequency division multiplexing passive optical networks (OFDM-PON) require efficient data compression and robust security measures.
    • Direct bitstream transmission using compressive sensing (CS) is limited by sparsity constraints in time and frequency domains.
    • Multimedia transmission offers opportunities to construct data sparsity for CS applications.

    Purpose of the Study:

    • To propose and evaluate chaotic CS encryption algorithms for OFDM-PON systems.
    • To enhance data compression efficiency and transmission security in optical networks.
    • To address the sparsity limitations of CS in direct bitstream transmission.

    Main Methods:

    • Implementation of chaotic compressive sensing (CS) encryption tailored for OFDM-PON.
    • Utilizing a 2-dimensional logistic-sine-coupling map (2D-LSCM) for pseudo-random number generation and measurement matrix construction.
    • Applying discrete cosine transform (DCT) to achieve data sparsity, optimized by four approximation algorithms, with 'Round + Set negative to 0' showing superior performance.
    • Incorporating sensor-based side information for multimedia identification and CS application.

    Main Results:

    • The proposed chaotic CS encryption effectively compresses data and enhances security in OFDM-PON.
    • The 2D-LSCM and DCT combination successfully addresses sparsity requirements for CS.
    • 'Round + Set negative to 0' approximation algorithm demonstrated optimal bit compression performance.
    • The integrated system achieved significant bandwidth savings and improved data security.

    Conclusions:

    • Chaotic CS encryption is a viable technique for securing OFDM-PON systems.
    • The developed algorithms offer a practical solution for data compression and security in optical networks.
    • This approach provides a balance between transmission efficiency and robust data protection.