CAJ | 학술논문

实用被动调制量子密钥分发系统中分束器存在波长依赖性，窃听者据此攻击分束器，以获取密钥信息并且不被发现，而且光纤中存在瑞利散射导致误码率增大。文中提出波分复用器方案来保障量子密钥分发的安全性，并且通过双波长交叉传递来降低误码率。方案中借助于波分复用器将不同波长的光子进行分离，只对部分波长的光子进行偏振测量，Alice和Bob可以通过公共信道分析误码率和收益，得出是否存在窃听者。
실용피동조제양자밀약분발계통중분속기존재파장의뢰성，절은자거차공격분속기，이획취밀약신식병차불피발현，이차광섬중존재서리산사도치오마솔증대。문중제출파분복용기방안래보장양자밀약분발적안전성，병차통과쌍파장교차전체래강저오마솔。방안중차조우파분복용기장불동파장적광자진행분리，지대부분파장적광자진행편진측량，Alice화Bob가이통과공공신도분석오마솔화수익，득출시부존재절은자。
In the practical Quantum Key Distribution (QKD) systems ,the beam splitter which made by the Fused Biconical Taper (FTP) technology has wavelength dependent property .So Eve will get almost all of the secret information without being discovered in this way . In this paper ,we proposed a solution for beating the beam splitter attack .Quantum Bit Error Rate (QBER) could increase with Rayleigh scattering effect in the fiber channel ,but in our schemes this effect could do very less by different wavelength photos . Wavelength Division Multiplexing (WDM ) would separate photos by their different wavelength ,and Bob can choose some reliable photos for QKD .Eve won’t catch anything about the secret information .