量子密钥分发是安全分发密钥的一种方式，文件包含其密钥率和传输距离的仿真代码，包含各类协议的比较，直接运行即可，非常有用的资料。。。。(Quantum key distribution (QKD) is a way of secure key distribution. The file contains the simulation code of key rate and transmission distance, and the comparison of various protocol