ITR-Reconfigurable multi-user quantum key distribution using optical fiber sagnac interferometer

通过使用单光子分发数据加密密钥，可以使用量子密码学来构建高度安全的信息网络。这样的网络将不受计算技术中的任何技术进步的影响，因为密钥是在量子物理水平上加密的。本课题主要研究一种基于光纤Sagnac干涉仪的动态可重构多用户量子密钥分配系统。该项目将包括一个四用户量子密钥分发系统的实验演示，该系统允许在同一物理光网络中建立多个量子加密链路。理论研究将集中于基于Sagnac干涉仪的多用户量子密钥分发网络的安全性及其对恶意窃听的免疫力。此外，本项目中的多用户QKD网络将提供一个物理平台，允许系统模拟窃听效果。。

A highly secure information network can be build using quantum cryptography by distributing the data encryption keys using single photons. Such a network would be immune to any technological advances in computing technology as the key is encrypted on a quantum physical level. This project focuses on a novel dynamically reconfigurable multi-user quantum key distribution (QKD) system using an optical fiber Sagnac Interferometer. The project will include an experimental demonstration of a four user QKD system that allows multiple quantum encryption links to be established in the same physical optical network. Theoretical studies will focus on the security of the Sagnac Interferometer based multi-user QKD network and its immunity to malicious eavesdropping. In addition, the multi-user QKD network in this project will provide a physical platform that allows the system to simulate the effects of eavesdropping. .