基于量子力学的基本原理，合法通信双方可以通过量子密钥分发（QKD）建立起无条件安全性的密钥，进而保证信息的无条件安全性。但是，受器件非完美性的影响，实际QKD系统中存在潜在的安全性漏洞。本项目针对商业QKD产品和实际光电设备开展安全性测试和分析，研究其中可能存在的安全漏洞，并建立相应的模型分析这些安全漏洞对实际QKD系统安全性的影响。同时，我们将通过修改已知量子黑客攻击方案来研究不同防御措施的有效性。进一步，我们将开展新QKD协议和实验方案的研究，以保证QKD能够更好的抵抗量子黑客和环境噪声的影响。

Quantum key distribution (QKD) admits two legal users to share an unconditional security key, which is guaranteed by the principle of quantum mechanics. However, due to the imperfection of practical devices, there exist many potential loopholes in the practical QKD system, which can be exploited by Eve to spy the final key. Here, we test and analyze the commercial QKD product and practical optical or electrical devices to find potential loopholes existed in these systems, then theoretical model will be set up to analyze the relationship between the discovered loophole and the security of QKD system. At the same time, we will test and analyze the effectivity of different countermeasures proposed to remove known quantum hacking strategies, by modifying such quantum hacking strategies. Furthermore, we will propose and demonstrate new QKD protocols and experimental schemes which are immune from the quantum hacking and noise.