Physical layer security--enhanced optical communication based on chaos masking and chaotic hardware encryption

Area of Science:

• Optics and Photonics
• Information Security
• Telecommunications

Background:

• Information security is paramount in modern communication systems.
• Optical communication systems are vulnerable to security breaches.
• Existing security measures may not suffice for high-capacity networks.

Purpose of the Study:

• To propose a physical layer security-enhanced optical communication scheme.
• To enhance system security through dual-level protection using chaos masking (CMS) and chaotic hardware encryption.
• To enable multi-path parallel and independent secure chaotic optical communication.

Main Methods:

• Utilizing uncorrelated chaos generated from a single Fabry-Perot (FP) laser.
• Employing chaos masking (CMS) for independent signal masking across multiple WDM channels.
• Implementing chaotic hardware encryption for enhanced data protection.
• Using temporal intensity scrambling to create noise-like encrypted signals.

Main Results:

• The proposed scheme significantly enhances communication security compared to individual methods.
• Numerical results show a decrypted bit error rate (BER) below the HD-FEC threshold for 10 Gb/s data.
• The system demonstrates proof-of-principle for secure multi-channel communication.

Conclusions:

• The integration of CMS and chaotic hardware encryption provides robust security.
• The scheme offers a promising solution for high-capacity secure optical communication.
• This approach enables parallel and independent security enhancement for chaotic optical communication.