【作者】 陈光；

【导师】 杨伯君；

【作者基本信息】 北京邮电大学 ， 光学， 2010， 硕士

【摘要】 量子密码学是实现通信系统绝对安全的有效解决方案。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。随着量子密码学在理论和实验上的飞速进展,点对点的量子密钥分发系统已经可以商用。近些年来,为了满足多用户网络通信系统的需求,量子密钥分发网络的研究已经成为一个新的研究方向。本文讨论了量子密钥分发网络的三种体制,按照网络节点功能的不同分为：1)基于信任节点的网络、2)基于光学节点的网络和3)基于量子节点的网络。同时对量子密钥分发网络的性能,应用环境和发展前景作了细致的分析。文中还提出了量子密钥分发与无线局域网协议(IEEE 802.11协议)安全体制的融合方案。在提出的新协议中,量子密钥分发被用于认证和数据加密当中,由此可以保证无线通信网络的绝对安全性。运用新的协议,我们用java语言开发了实现两用户间通信的软件。应用此软件,可以仿真模拟整个加密的全过程以及根据用户需要配置通信过程所需要的参数。更多还原

【Abstract】 Quantum cryptography is considered as a promising solution towards absolute security in communication systems.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.As rapid progress in theory and experiment of quantum cryptography, point-to-point quantum key distribution(QKD) systems are already commercial available.During these years,the analysis on QKD network has become a new trend, which is used to fulfill the requirements of multi-user communication systems.This paper discusses about three schemes of QKD network which is differentiated by the functionalities of network node:1) trusted relay node,2) optical node and 3) quantum node and also analyses the performances, applicable conditions and application prospect of QKD network.We explore the integration of QKD in Wireless Local Access Network protocol (IEEE 802.11) security mechanisms.In the new protocol we raised, QKD is used in both authentication and data encryption in order to ensure the absolute security of wireless communications.A software is developed in java language to implement the two-user communication using this new protocol.With this software, we can simulate the whole encryption process as well as to set the parameters used in this communication.更多还原