Quantum key distribution is based on the heisenberg ' s uncertainty principle which guarantees that no eavesdropper can escaped detection . a linchpin technology of quantum key distribution is single photon which is foundation of security 根据量子力学中的海森伯不确定性原理及未知单光子态不可克隆原理，任何窃听者无法窃听量子密码通信中的信息而不被发现。
In the modern communication society , there is wide spread need of secure transmission of secret information , such as the commercial trade and the communication in network , which need to be on the guard of the attack of the eavesdropper 当今信息社会对于保密信息的安全传输有着广泛的需求，商业贸易、网络通信等都需要防范窃听者的侵入。同时，计算机的飞速发展使破译手段越来越高。
In the new model , the legitimate partners can control the error bit rate of the eavesdropper ' s channel by adjusting their virtual binary symmetric channels . when our new model is implemented , the problem of receiving synchronization of the partners will not occur 在该模型中，通信双方使用虚拟的二元对称信道来控制窃听方接收信道的误比特率，而且使用该模型也不存在信息接收同步的问题。
Having known well on the study of the current situation about quantum cryptographic key , the rr quantum cryptographic key distribution protocol is concerned in this paper . the protocol includes the preparation of the secret - key 、 the eavesdropper detection 、 secret - key correction and privacy amplification 在深入调查量子密码研究现状的基础上,本文针对rr协议进行了分析与研究,主要包括密钥制备、窃听者检测、数据纠错以及隐私放大等过程的实现方法。
This paper makes an extension to the model of strand space in theorem . whereas the hash function in key agreement protocol , using the honest function , we expansion the capacity of the eavesdropper and the correlative theories in strand space . given the strand space of wtls from the simplified model in 4 . 2 . 2 , combining the concept of ideal and honest function , we analysed the security and authentication of wtls , and pointed out a limitation of the mend of paulson ’ s weaker theorem about tls ’ s main secret 本文首先从理论上对串空间模型进行了扩展,针对密钥协商协议中的单向hash函数,利用诚实函数的概念,扩充了攻击者能力,同时也扩展了串空间中的相关定理;在对wtls协议进行安全分析时,首先给出了协议的一个简化形式,得到了wtls串空间,并结合理想和诚实函数的概念,分析了wtls协议的秘密性和认证性,指出了paulson关于tls主秘密的弱理论改进的缺陷。
Practical implementations of quantum key distribution systems use attenuated laser pulses as the signal source rather than single photons . the channels used to transmit are lossy . on the basis of above two points , a combining eavesdropping strategy of intercept - resend and beam - splitting is discussed in terms of eavesdropper ' s technology requirement and detection efficiency and dark count of single - photon counter 主要工作包括以下三部分：一、基于实际量子密钥分配( qkd )系统中所使用的强衰减的激光脉冲不是单光子，量子密钥分配的信道不是无损耗的，光子计数器存在探测效率和暗计数以及窃听者的技术能力也不是无限的这些具体问题。
Thrown out of his honourable employment in england , through too much unsuccessful hard swearing there - not because he was not wanted there : our english reasons for vaunting our superiority to secrecy and spies are of very modern date - he knew that he had crossed the channel , and accepted service in france : first , as a tempter and an eavesdropper among his own countrymen there : gradually , as a tempter and an eavesdropper among the natives 他在英国丢掉了那份体面的差使是因为多次咬着牙作伪证失败，而不是因为那儿不需要伪证。我们英国人夸耀自己鄙视干涉隐私和密探行当的种种根据，其实是新近才出现的。巴萨心里明白，他跨过海峡到法国来当差，起初是在自己的侨胞之间做套诱和窃听的工作，后来逐渐干到法国人当中去了。
