The security of quantum key distribution using the real system and the foundation of quantum

在本研究中，我们准备了两个主题作为一个向地性，从而达到研究主题。一个是“基于真实的系统的量子密钥分配的安全性”，另一个是“量子信息理论的基础”，如果是关于真实的系统，量子信息理论的情况在研究过程中已经完成了显著的变化，特别是量子密钥分配系统已经到了应用的阶段。在此基础上，提出了两个重要的研究成果。一种是“利用弱相干量子信息和量子擦除信道”下的安全QKD协议。另一个是同时实现隐私放大的纠错系统，在后一个问题上，我们将其他量子协议纳入研究领域，并猜测了目前我们应该如何看待理论假设的重要性。特别是，我们评估并提出了量子比特承诺协议，QKD协议与多光子协议。通过这些研究，我们得出结论：安排好纠缠态的可用性假设、量子态的实现假设、量子存储器的存在假设、量子信道模型的假设，对于构建安全的量子协议具有重要意义。

In this research, we prepared two themes as a geotropism which attains the research subject. One is "The security of quantum key distribution using the real system" and the other is "the foundation of quantum information theory".If it says about the real system, the situation of a quantum information theory will have accomplished the remarkable variation during the research.In particular, quantum key distribution system arrived at the region of utilization. And related software is remarked on the system.Therefore we propose two important research results. One is secure QKD protocol under "using week coherent quantum information and quantum erasure-channel". And another is error-correcting system that achieves privacy amplification simultaneously.On the later-subject, we put other quantum protocols into the research field, and we have guessed how we should consider the theoretical hypothesis to be important at present. In particular, we evaluated and proposed quantum bit commitment protocol, QKD protocol with multi-photon protocols. Though the researches, we conclude that it is important for construction of secure quantum protocols to arrange the assumption of availability of entanglement states, of realization of quantum states, of existence of quantum memory, of quantum channel models.