High-security UFMC optical transmission system of seven-core fiber based on updating the 3D discrete chaotic model

Abstract

In this paper, we propose a high-security universal filtered multicarrier (UFMC) transmission system based on a novel, to the best of our knowledge, three-dimensional (3D) discrete chaotic model. The cascade of counters and the 3D discrete chaotic system is used to generate three masking factors and update these factors to encrypt the bitstream, constellation, and the information of the subcarriers. Using this structure, the key space is 10270 and the key is updated in a timely manner. In this work, the encryption scheme solves the dynamic degradation of chaotic cryptography. Experimental results show that there is no significant difference in error performance in comparison with before encryption. Compared with the orthogonal frequency division multiplexing (OFDM) system, the spectrum efficiency of the UFMC system is higher, which reduces out-of-band leakage and interference between services. Considering the complexity constraints of the receiver, the inter-symbol interference caused by fiber dispersion is alleviated by optimizing the distribution of data subbands, and the bit error rate (BER) performance is improved. It is shown that the UFMC system obtains 1.9 dB gain compared with the OFDM system in terms of receiver sensitivity when the BER is 10−3. This encryption scheme has a promising application prospect in short-distance optical access systems in the future.

A novel hyperchaotic map and its application in fast video encryption

“…SP1, SP2 are the initial index of the encryption sequences. The values of {x 0 , y 0 , Kx 0 , Ky 0 , Ka, Kb, Sy 0 , Soundx 0 , Soundy 0 } are calculated by the equation (9), where is listed as follow:…”

“…Matthews et al firstly applied chaotic maps to the field of information encryption [6], thereafter, chaotic encryption algorithms have attracted great attention. A variety of one-dimensional discrete chaotic systems have been applied in the field of information encryption [7][8][9]. One-dimensional chaotic systems show fast iteration speed and seem to be easy to implement.…”

Doppler Delay-Time Frequency Cross-Domain Joint High Security Transmission Scheme Based on Orthogonal Time Frequency Space

“…At present, the chaotic encryption method in the digital domain is widely used. It has high flexibility and can be compatible with the existing high-speed optical network communication system [26], [27]. Compared with the traditional upper-layer algorithm encryption scheme, the chaotic physical layer encryption scheme in the digital domain effectively avoids the risk of data header leakage, and is compatible with a variety of modulation methods.…”