Open AccessTrading off security and practicability to explore high-speed and long-haul chaotic optical communication
Author(s) -
Lin Jiang,
Yan Pan,
Anlin Yi,
Jiacheng Feng,
Wei Pan,
Lilin Yi,
Weisheng Hu,
Anbang Wang,
Yuncai Wang,
Yuwen Qin,
Lianshan Yan
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.423098
Subject(s) - computer science , encryption , chaotic , transmission (telecommunications) , optical communication , gigabit , secure communication , cryptography , communications system , bit error rate , electronic engineering , chaos (operating system) , telecommunications , computer network , computer security , decoding methods , engineering , artificial intelligence
Recent demonstrations of chaos-based secure communication have proven the feasibility of secured transmission of high-speed (tens of Gbit/s) signals over certain distances (∼100-km), which bring hope for secure communication from theoretical analysis to practical applications. So far, the chaos-based secure communication system with chaos-masking (CMS) encryption is considered as one of the most important and feasible schemes. In this paper, an optical chaotic carrier generated by an opto-electronic oscillator is used to encrypt 112-Gbit/s message by CMS encryption for data transmission over a 1040-km single-mode-fiber. The message is successfully decrypted by combining coherent detection and our proposed blind decryption algorithms, which can successfully separate the chaotic carrier and the message with the bit-error-rate (BER) below the forward error correction (FEC) threshold. Experimental results show that the coherent detection combined digital signal processing algorithms may be a possible way to promote the practical applications of chaotic optical communication in the future. In addition, this paper reveals that the security of the CMS encryption may be not high enough for those systems requiring rigorous confidentiality. Subsequently, we further discuss the bottlenecks encountered in current high-speed chaotic optical communication systems and analyze how to improve and weight the security and practicability.