Physical-enhanced secure strategy in an OFDM-PON

Area of Science:

• Telecommunications Engineering
• Network Security
• Optical Communications

Background:

• The physical layer of optical access networks faces increasing security vulnerabilities due to rising user numbers and network capacity.
• Ensuring physical-layer security is critical for the integrity and confidentiality of data transmitted over these networks.

Purpose of the Study:

• To propose and validate a novel physical-enhanced secure strategy for orthogonal frequency division multiplexing passive optical networks (OFDM-PONs).
• To improve the confidentiality and robustness of the physical layer against various attacks.

Main Methods:

• Implementation of a physical-enhanced secure strategy utilizing frequency domain chaos scrambling.
• Adoption of the Logistic map for dynamic chaos mapping and scrambling matrix allocation.
• Derivation of a mathematical model for the secure system.

Main Results:

• Successful secure transmission of 10.125 Gb/s 64QAM-OFDM data over a 25-km single-mode fiber.
• Experimental validation demonstrating the effectiveness of Logistic mapped chaos scrambling.
• The proposed scheme protects against eavesdroppers and attackers without degrading performance for legitimate users.

Conclusions:

• The proposed chaos scrambling strategy provides a robust solution for enhancing physical-layer security in OFDM-PONs.
• The method ensures data confidentiality and system integrity while maintaining high communication performance.
• This approach is vital for securing next-generation optical access networks.