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<p>To achieve high-speed and long-haul secure optical communication, we propose a scheme of high-speed secure optical communication based on intensity and phase dual chaotic encryption, which effectively conceals plaintext information by encrypting the intensity and phase of the quadrature amplitude modulation (QAM) optical signals, enhancing plaintext security. In the receiver, coherent detection replaces traditional direct detection for decryption, to precisely recover the encrypted amplitude and phase information. Numerical results indicate that this method maintains a low correlation between 40Gb/s QAM plaintext and chaotic encrypted data in both intensity and phase, boosting communication system security. The bit error rate remains below 4.7 × 10<sup>–4</sup> over a 120 km optical fiber link. System performance is assessed by examining the effects of hardware parameter mismatches. This scheme offers a practical solution for future high-speed, long-distance secure optical communication systems.</p>

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High-speed optical chaotic secure communication scheme based on intension-phase double encryption

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Yuming Zhang,
  • Xuefang Zhou,
  • Jingqi Yin,
  • Jie Luo

摘要

To achieve high-speed and long-haul secure optical communication, we propose a scheme of high-speed secure optical communication based on intensity and phase dual chaotic encryption, which effectively conceals plaintext information by encrypting the intensity and phase of the quadrature amplitude modulation (QAM) optical signals, enhancing plaintext security. In the receiver, coherent detection replaces traditional direct detection for decryption, to precisely recover the encrypted amplitude and phase information. Numerical results indicate that this method maintains a low correlation between 40Gb/s QAM plaintext and chaotic encrypted data in both intensity and phase, boosting communication system security. The bit error rate remains below 4.7 × 10–4 over a 120 km optical fiber link. System performance is assessed by examining the effects of hardware parameter mismatches. This scheme offers a practical solution for future high-speed, long-distance secure optical communication systems.