Chen Gengyin, Liu Bo, Ren Jianxin, Mao Yaya, Song Xiumin, Wu Xiangyu, Chen Shuaidong, Ullah Rahat, Qi Zhipeng, Wu Yongfeng, Sun Tingting, Li Ying, Zhao Lilong, Wang Feng
Opt Express. 2024 Sep 23;32(20):34331-34343. doi: 10.1364/OE.533041.
This paper proposes a chaos-driven seven-core optical transmission scheme based on DNA full information chained analog-transcription. Unlike traditional deoxyribonucleic acid (DNA) coded encryption schemes in the bit dimension, this scheme uses chaotic sequences to generate perturbed bit streams corresponding to the initial bit stream. These two sets of bit streams are encoded from a set of DNA double-stranded sequences, which are then intertwined into a single-stranded DNA containing all the information through the full-information class transcription algorithm proposed in this paper. Finally, the DNA decoding process is driven by a set of sequences derived from another chaotic model to transform the DNA sequence containing all information back into a bit sequence for subsequent transmission. Additional chaotic sequences interfere with the subcarriers, symbols, and constellation angles. Moreover, to maintain spectral efficiency, hiding the key in the frame header allows for the dynamic simultaneous transmission of signal and key. The transmission of encrypted 16 quadrature amplitude modulation-orthogonal chirp division multiplexing (16QAM-OCDM) signals is experimentally demonstrated at a net bit rate of 51.72 Gb/s over 2 km weakly coupled seven-core fiber. At the receiving end, the correct key decoder is able to accurately recover the data, while the bit error ratio (BER) at the illegal receiving end is 0.5. Finally, quantitative experiments validate the receiver-side decryption algorithm, showing that the proposed encryption scheme achieves a large key space of 10. The key can be fully decoded when the optical power is above -20dBm. This scheme significantly enhances the security and flexibility of the communication system, making it a promising candidate for future optical communication physical layer encryption.
本文提出了一种基于DNA全信息链式模拟转录的混沌驱动七芯光传输方案。与传统的比特维度脱氧核糖核酸（DNA）编码加密方案不同，该方案使用混沌序列生成与初始比特流相对应的扰动比特流。这两组比特流由一组DNA双链序列编码，然后通过本文提出的全信息类转录算法交织成包含所有信息的单链DNA。最后，DNA解码过程由源自另一个混沌模型的一组序列驱动，将包含所有信息的DNA序列转换回比特序列以便后续传输。额外的混沌序列会干扰子载波、符号和星座角。此外，为了保持频谱效率，将密钥隐藏在帧头中允许信号和密钥的动态同时传输。在2 km弱耦合七芯光纤上以51.72 Gb/s的净比特率对加密的16正交幅度调制 - 正交啁啾分复用（16QAM - OCDM）信号的传输进行了实验验证。在接收端，正确的密钥解码器能够准确恢复数据，而非法接收端的误码率（BER）为0.5。最后，定量实验验证了接收端解密算法，表明所提出的加密方案实现了10的大密钥空间。当光功率高于 - 20dBm时，密钥可以被完全解码。该方案显著提高了通信系统的安全性和灵活性，使其成为未来光通信物理层加密的有前途的候选方案。
