基于高维纠缠态的量子密钥分发协议

Quantum key distribution protocol based on high-dimensional entangled states

为了提高量子密钥分发的效率和安全性,利用高维Hilbert空间中的Bell态和Hadamard门设计了一种量子密钥分发协议。首先通过量子态的动态演变验证了三维Bell纠缠态在Z基和X基下具有不同的表示特性,然后以此为基础进行协议设计,其中利用Z基测量来检测窃听,利用X基测量来产生密钥。安全性分析表明,该协议可以抵抗截获重发、纠缠附加粒子和特洛伊木马三种常见的攻击。最后将协议与其他方案进行了比较,该协议在保证量子比特效率50%的基础上,安全性也有所提升。

In order to improve the efficiency and security of quantum key distribution,this paper proposed a quantum key distribution protocol based on Bell states and Hadamard gates in high-dimensional Hilbert space.Firstly,this protocol used the dynamic evolution of the quantum state to verify that the three-dimensional Bell entangled states had different representation characteristics under Z basis and X basis.Then it used Z basis measurement to detect eavesdropper and X basis measurement to generate key.Security analysis shows that the proposed protocol can resist common intercept-resend,entangled additional particle and Trojan horse attacks.Finally,compared with other schemes,the security of this protocol has improved on the basis of 50%qubit efficiency.