Abstract

In this paper, a security enhanced physical layer encryption scheme is proposed for coherent optical orthogonal frequency division multiplexing (CO-OFDM) system. This scheme is based on a concatenated inter-domain joint scrambling (CIJS) method, while adopting the three-dimension logistic sine cascading mapping (3D-LSCM) as a chaos key system to improve the security. Thrice inter-domain cat mappings are implemented, which fully exploits the characteristic domains of OFDM data and greatly increases the possible permutations. An experiment of the encryption scheme is realized successfully in a 16QAM CO-OFDM system at a symbol rate of 40 Gbaud over an 80 km standard single mode fiber. The experiment shows that no bit error rate (BER) and peak to average power ratio (PAPR) penalties are introduced in this scheme. The proposed 3D-LSCM chaos system shows superior properties of high sensitivity to initial values and improved uniform distribution, which guarantees the large entropy and further the system's security. This scheme can effectively prevent against a chosen-text attack which is the most effective attack method due to the extremely small tolerabledeviation and the large key space of 1.12 × 10²⁰⁷.

Physical layer encryption scheme based on cellular automata and DNA encoding by hyper-chaos in a CO-OFDM system

Le Liu, Xianfeng Tang, Xin Jiang, Zeyu Xu, Fan Li, Zibin Li, Hongbing Huang, Pengcheng Ni, Longyong Chen, Lixia Xi, and Xiaoguang Zhang
Opt. Express 29(12) 18976-18987 (2021)

Time–Frequency Domain Encryption With SLM Scheme for Physical-Layer Security in an OFDM-PON System

Yaoqiang Xiao, Zhiyi Wang, Jun Cao, Rui Deng, Yi Liu, Jing He, and Lin Chen
J. Opt. Commun. Netw. 10(1) 46-51 (2018)

Secure key real-time update and dynamic DNA encryption for CO-OFDM-PON based on a hybrid 5-D chaos

Yun Wang, Qi Zhang, Ran Gao, Xiangjun Xin, Rongzhen Xie, Jingkun Jiang, Feng Tian, Xinying Li, Fu Wang, Qinghua Tian, Zhipei Li, Yongjun Wang, Leijing Yang, and Xiaolong Pan
Opt. Express 31(26) 42961-42975 (2023)

High security OFDM-PON with a physical layer encryption based on 4D-hyperchaos and dimension coordination optimization

Jianye Zhao, Bo Liu, Yaya Mao, Rahat Ullah, Jianxin Ren, Shuaidong Chen, Lei Jiang, Shun Han, Jingyi Zhang, and Jiajia Shen
Opt. Express 28(14) 21236-21246 (2020)

Probabilistic shaping based constellation encryption for physical layer security in OFDM RoF system

Zhiyi Wang, Yaoqiang Xiao, Sitao Wang, Yuansiyi Yan, Bingshuai Wang, Yating Chen, Zhihua Zhou, Jing He, and Liang Yang
Opt. Express 29(12) 17890-17901 (2021)