光通信网物理层全光异或加解密技术研究

摘要

针对目前光通信保密系统中基于电信号处理的流密码加解密技术的局限性，提出基于全光信号处理的加解密技术；对几种典型的全光异或加密方案进行了研究，介绍了各自的工作原理、特点及研究进展；利用 OptiSystem 软件搭建了基于SOA-MZI(半导体光放大器-马赫-曾德干涉仪)异或门的全光加解密系统仿真模型，并基于 HNLF(高非线性光纤)的自相位调制效应设计了一个优化结构对系统进行优化。研究表明：全光加解密技术具有优良的特性，能使整个光通信保密系统运算速率更高，传输更安全。%In view of the limitations of the electric signal processing-based stream cipher encryption/decryption technology for optical communication security systems,this paper presents an all-optical signal processing-based encryption/decryption tech-nology,studies several typical all-optical XOR encryption schemes and introduces their operating principles,characteristics and research advances.Then,it builds a simulation model for the SOA-MZI XOR gate-based all-optical encryption/decryption sys-tem using the OptiSystem software and optimizes the system by a optimization structure designed on the basis of the self-phase modulation effects of High Nonlinear Fiber (HNLF).Studies show that the all-optical encryption/decryption technology has excellent performances and enables the entire security system to have higher operation rates and more secured transmissions.