This paper proposes a novel physical-enhanced chaotic secure strategy for optical OFDMA-PON based on two-dimensional (2-D) scrambling. In order to enhance the physical security, a multi-layer chaotic mapping is proposed to generate the scrambling vectors. It can enhance the chaotic characteristic of Logistic mapping and increase the key space. Furthermore, the 2-D scrambling jointly utilizing frequency subcarriers and time-slots can improve the system resistance to eavesdropper. The feasibility of 15.6 Gb/s 2-D encrypted 64QAM-OFDM downstream signal has been successfully demonstrated in the experiment. The robustness of the proposed method shows its prospect in future OFDM access network.

© 2012 OSA

1. N.-C. Tran, E. Tangdiongga, C. Okonkwo, H. Jung, and T. Koonen, “Flexibility level adjustment in reconfigurable WDM-TDM optical access networks,” J. Lightwave Technol.30(15), 2542–2550 (2012). [CrossRef]
2. N. Cvijetic, “OFDM for next-generation optical access networks,” J. Lightwave Technol.30(4), 384–398 (2012). [CrossRef]
3. R. Schmogrow, M. Winter, D. Hillerkuss, B. Nebendahl, S. Ben-Ezra, J. Meyer, M. Dreschmann, M. Huebner, J. Becker, C. Koos, W. Freude, and J. Leuthold, “Real-time OFDM transmitter beyond 100 Gbit/s,” Opt. Express19(13), 12740–12749 (2011). [CrossRef] [PubMed]
4. H.-Y. Chen, C. C. Wei, D.-Z. Hsu, M. C. Yuang, J. Chen, Y.-M. Lin, P.-L. Tien, S. S. W. Lee, S.-H. Lin, W.-Y. Li, C.-H. Hsu, and J.-L. Shih, “A 40-Gb/s OFDM PON system based on 10-GHz EAM and 10-GHz direct-detection PIN,” IEEE Photon. Technol. Lett.24(1), 85–87 (2012). [CrossRef]
5. J. Zhao and A. Ellis, “Transmission of 4-ASK optical fast OFDM with chromatic dispersion compensation,” IEEE Photon. Technol. Lett.24(1), 34–36 (2012). [CrossRef]
6. X. Q. Jin, E. Hugues-Salas, R. P. Giddings, J. L. Wei, J. Groenewald, and J. M. Tang, “First real-time experimental demonstrations of 11.25Gb/s optical OFDMA PONs with adaptive dynamic bandwidth allocation,” Opt. Express19(21), 20557–20570 (2011). [CrossRef] [PubMed]
7. N. Cvijetic, M.-F. Huang, E. Ip, Y. Shao, Y.-K. Huang, M. Cvijetic, and T. Wang, “1.92 Tb/s coherent DWDM-OFDMA-PON with no high-speed ONU-side electronics over 100 km SSMF and 1:64 passive split,” Opt. Express19(24), 24540–24545 (2011). [CrossRef] [PubMed]
8. M. P. Fok, Z. Wang, Y. Deng, and P. R. Prucnal, “Optical layer security in fiber-optic networks,” IEEE Trans. Inf. Forensics and Security6(3), 725–736 (2011). [CrossRef]
9. C. E. Shannon, “Communication theory of secrecy systems,” Bell Syst. Tech. J.28, 656–715 (1949).
10. S.-L. Chen, T. T. Hwang, and W.-W. Lin, “Randomness enhancement using digitalized modified logistic map,” IEEE Trans. Circuits Syst., II Express Briefs57(12), 996–1000 (2010). [CrossRef]
11. L. Zhang, X. Xin, B. Liu, and J. Yu, “Physical-enhanced secure strategy in an OFDM-PON,” Opt. Express20(3), 2255–2265 (2012). [CrossRef] [PubMed]

Bell Syst. Tech. J.

• C. E. Shannon, “Communication theory of secrecy systems,” Bell Syst. Tech. J.28, 656–715 (1949).

IEEE Photon. Technol. Lett.

• H.-Y. Chen, C. C. Wei, D.-Z. Hsu, M. C. Yuang, J. Chen, Y.-M. Lin, P.-L. Tien, S. S. W. Lee, S.-H. Lin, W.-Y. Li, C.-H. Hsu, and J.-L. Shih, “A 40-Gb/s OFDM PON system based on 10-GHz EAM and 10-GHz direct-detection PIN,” IEEE Photon. Technol. Lett.24(1), 85–87 (2012). [CrossRef]
• J. Zhao and A. Ellis, “Transmission of 4-ASK optical fast OFDM with chromatic dispersion compensation,” IEEE Photon. Technol. Lett.24(1), 34–36 (2012). [CrossRef]

IEEE Trans. Circuits Syst., II Express Briefs

• S.-L. Chen, T. T. Hwang, and W.-W. Lin, “Randomness enhancement using digitalized modified logistic map,” IEEE Trans. Circuits Syst., II Express Briefs57(12), 996–1000 (2010). [CrossRef]

IEEE Trans. Inf. Forensics and Security

• M. P. Fok, Z. Wang, Y. Deng, and P. R. Prucnal, “Optical layer security in fiber-optic networks,” IEEE Trans. Inf. Forensics and Security6(3), 725–736 (2011). [CrossRef]

J. Lightwave Technol.

• N.-C. Tran, E. Tangdiongga, C. Okonkwo, H. Jung, and T. Koonen, “Flexibility level adjustment in reconfigurable WDM-TDM optical access networks,” J. Lightwave Technol.30(15), 2542–2550 (2012). [CrossRef]
• N. Cvijetic, “OFDM for next-generation optical access networks,” J. Lightwave Technol.30(4), 384–398 (2012). [CrossRef]

Opt. Express

• R. Schmogrow, M. Winter, D. Hillerkuss, B. Nebendahl, S. Ben-Ezra, J. Meyer, M. Dreschmann, M. Huebner, J. Becker, C. Koos, W. Freude, and J. Leuthold, “Real-time OFDM transmitter beyond 100 Gbit/s,” Opt. Express19(13), 12740–12749 (2011). [CrossRef] [PubMed]
• L. Zhang, X. Xin, B. Liu, and J. Yu, “Physical-enhanced secure strategy in an OFDM-PON,” Opt. Express20(3), 2255–2265 (2012). [CrossRef] [PubMed]
• X. Q. Jin, E. Hugues-Salas, R. P. Giddings, J. L. Wei, J. Groenewald, and J. M. Tang, “First real-time experimental demonstrations of 11.25Gb/s optical OFDMA PONs with adaptive dynamic bandwidth allocation,” Opt. Express19(21), 20557–20570 (2011). [CrossRef] [PubMed]
• N. Cvijetic, M.-F. Huang, E. Ip, Y. Shao, Y.-K. Huang, M. Cvijetic, and T. Wang, “1.92 Tb/s coherent DWDM-OFDMA-PON with no high-speed ONU-side electronics over 100 km SSMF and 1:64 passive split,” Opt. Express19(24), 24540–24545 (2011). [CrossRef] [PubMed]

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