中文摘要：

给出一种基于超纠缠交换的量子密钥分发方案,这个方案可以同时产生确定密钥和随机密钥,并且它的安全性不受任何损害.这个方案只需要一对在空间（路径）模式和极化模式上超纠缠的光子就能获得4bit的密钥（2bit随机密钥和2bit确定密钥）.在目前的实验条件下,这个方案可以通过线性光学来实现.

英文摘要：

We present a quantum key distribution scheme based on hyperentanglement swapping, which can simultaneously generate deterministic and random keys without the loss of security. The scheme only requires two-photon states entangled both in spatial （path） and polarization modes, and such a photon pair can create 4 bit of secure keys （2 bit of random keys and 2 bit of deterministic keys）. Our protocol can be implemented with linear optics under current technology.