时间透镜系统在流密码二次加密中的应用研究  

Application research of time lens system in stream cipher secondary encryption

作　　者：郭淑琴[1] 邱藜 GUO Shuqin;QIU Li(College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]浙江工业大学信息工程学院

出　　处：《浙江工业大学学报》2020年第1期20-24,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(61675183)

摘　　要：时间透镜成像系统可以应用在密码学实时加密系统中。数字信号的加密一般使用数字信号处理器或者计算机软件程序进行处理,而这些传统的加密方式难以处理光信号。经过理论研究和MATLAB仿真可以得出结论:当四波混频时间透镜成像系统的放大倍数为-1时,时间透镜系统会将通过的光信号波形进行反演,这就和流密码加解密的过程相近,所以时间透镜成像系统可以应用在流密码实时加解密系统中。时间透镜成像系统在流密码一次加解密应用中的安全性不高,所以提出时间透镜在流密码二次加密系统中的应用研究,最后通过仿真验证了时间透镜对高速光信号的二次加解密过程。Time lens systems are applied to real-time encryption systems. In a conventional stream cipher encryption system, digital signals are usually encrypted by a digital signal processor or a computer program, but these conventional encryption methods hardly process optical signals, especially high-speed optical signals. Through theoretical derivation and program simulation, it is discovered that when the magnification of four-wave mixing time lens is-1, the optical signal will be time inversion through the time lens, which is similar to the encryption and decryption process of the stream cipher. Therefore, the theory of time-lens can be applied to stream ciphers. In addition, due to the insecurity of time-lens systems in stream ciphers, the applied research of time lens in the stream cipher secondary encryption system is proposed. Finally, the simulation verified that the time lens is used for the secondary encryption and decryption of high-speed optical signals.

关 键 词：时间反演 四波混频 流密码 时间透镜 二次加密 

分 类 号：O439[机械工程—光学工程]