Abstract
This letter proposes and experimentally demonstrates a novel physical layer security method based on a piecewise chaotic permutation for orthogonal frequency division multiplexing (OFDM) passive optical networks. The piecewise parabolic chaotic map is adopted to generate chaotic permutation vectors, which enhance the physical layer security with a simple structure. An experiment with a 26.33-Gb/s encrypted optical OFDM signal is performed to demonstrate the proposed method. The results show good resistance against illegal optical network units and indicate that our method has the potential for use in secure optical access networks.
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