采用该方案可以实现远距离量子保密通信。
The scheme can be generalized to realize the long range quantum secure communication.
这为量子保密通信中密钥的安全管理提供了新的思路和方法。
It provides a new way of thinking and a new method for managing the key safely for the quantum secret communication.
其中近红外单光子探测技术是实现量子保密通信的关键问题之一。
Near-infrared single photon detection is one of the key problems of realizing the quantum security communication.
第三章：详细讨论了基于相位调制偏振编码的量子保密通信系统。
Chapter3: This chapter discusses the quantum cryptography system based on phase modulation polarization coding technology in details.
论文对量子信息中的量子保密通信系统及量子逻辑门进行了研究。
This thesis mainly focuses on investigation on the quantum cryptography communication system and quantum logic gates.
相对国外来说，国内在这量子保密通信方面的研究还是比较落后。
Domestic research in this aspect is still relatively backward to foreign countries.
量子保密通信系统以量子力学中的基本定理为基石，可以提供绝对的信息安全。
Quantum cryptography communication system is based on principles of quantum mechanics, thereby it can provide absolute security of information.
第五章介绍量子密钥分发网络的层次模型及国际上现有的实现量子保密通信网络的三种主要方案。
In chapter 5, QKD network model is introduced as well as the present three major quantum communication networks in the international.
同时，作为一个容易操控的量子信息载体和飞行的量子比特被广泛应用于量子信息领域，尤其是量子保密通信。
Meanwhile, as an easy-controllable information-carrier and a flying qubit, single photon sources have been widely used in quantum information and quantum computaion, especially quantum cryptography.
量子保密通信提供了一种绝对安全的通信方案，它的安全性由不可改变的自然规律保证，是任何技术都无法攻破的。
Quantum cryptography provides a new method for absolutely secure communication, which is guaranteed by the inviolability of a Law of Nature, and any advanced technologies cannot decipher it.
另外在保密通信及量子计算机方面，偏振态也参与其中起到越来越重要的作用。
In addition, the polarization is involved in the secret communication and quantum computers, and also plays an important role.
量子密码是与计算机密码处于同一时代的密码学分支，它以量子力学为基础，能实现无条件安全的保密通信。
Quantum cryptography and computer cryptography are two branches of cryptography at the same age. Quantum cryptography based on the quantum mechanics can achieve unconditionally secure communications.
然而，基于量子物理原理的量子密码学已被证明是保密通信中密钥安全分配的有效手段。
Nevertheless, quantum cryptography, which is based on quantum physics, has been proved to be an effective technique for secure key distribution.
与经典保密通信不同的是，量子密码学不是基于大数分解的复杂性，而是基于量子力学的原理。同时，量子密码也是不依赖于计算机系统的计算能力的。
Rather than depending on the complexity of factoring large numbers, quantum cryptography is based on the rules of physics and is also independent of the processing power of computing systems.
根据诲森堡测不准原理，使用量子密码可以使通信双方不需要事先准备相同的密码本即可绝对保密地通信。
Based on Heisenberg's uncertainty principle, quantum cryptography allows two parties who share no secret information beforehand to communicate in absolute security.
根据诲森堡测不准原理，使用量子密码可以使通信双方不需要事先准备相同的密码本即可绝对保密地通信。
Based on Heisenberg's uncertainty principle, quantum cryptography allows two parties who share no secret information beforehand to communicate in absolute security.
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