[2] FokM P, WangZ, DengY, et al. Optical Layer Security in Fiber-optic Networks[J]. IEEE Transactions on Information Forensics and Security, 2011, 6(3):725-736.
[3] GongX, ZhangQ, ZhangX, et al. Security Issues and Possible Solutions of Future-Oriented Optical Access Networks for 5G and Beyond[J]. IEEE Communications Magazine, 2021, 59(6):112-118.
[4] AbbadeMLF, LessaL S, SantosM, et al. A New DSP-based Physical Layer Encryption Technique Applied to Passive Optical Networks[C]//2018 20th International Conference on Transparent Optical Networks(ICTON). Bucharest, Romania: IEEE, 2018: 8473949.
[6] LiuL, XiaoS, ZhangL, et al. Digital Chaos-masked Optical Encryption Scheme Enhanced by Two-dimensional Key Space[J]. Optics Communications, 2017, 398:62-66.
[7] ZhangL, XinX, LiuB, et al. Physical Secure Enhancement in Optical OFDM A-PON based on Two-dimensional Scrambling[J]. Optics express, 2012, 20(26):B32-B37.
[8] BiM, FuX, ZhouX, et al. A Key Space Enhanced Chaotic Encryption Scheme for Physical Layer Security in OFDM-PON[J]. IEEE Photonics Journal, 2017, 9(1):2661581.
[9] FokM P, WangZ, DengY, et al. Optical Layer Security in Fiber-Optic Networks[J]. IEEE Transactions on Information Forensics and Security, 2011, 6(3):725-736.
[11] ErdoganT. Fiber Grating Spectra[J]. Journal of Lightwave Technology, 1997, 15(8):1277-1294.