基于QKD量子密钥扩展的方法研究

Research on extending quantum key approach based on QKD

目前量子密钥分发所面临的最主要问题是如何实现远距离、高码率量子密钥传输。为提高量子保密通信系统量子密钥生成的速率,提出一种反射和位移相结合的技术对已有的码率较低的量子密钥进行扩展处理,提高量子密钥库的容量。实验结果表明,采用反射技术和位移技术不但能有效地扩展量子密钥随机序列,同时可以保持良好的随机性,是一种扩展量子密钥库的有效方法。

At present the most important problem of quantum key distribution is how to realize the key for long-distance and high code rate. So in order to improve the quantum key rates of quantum security communication systems, the reflection technique and displacement technique are studied to extend the capacity of quantum key warehouse. The experiment simulation shows that the reflection technique and displacement technique can extend random sequence and their random quality is invariable