一种基于BB84协议的量子密钥分配改进方案

针对BB84协议对存在窃听的有噪信道中进行量子密钥分配效率不高的问题, 提出一种改进方案。新方案在发送方与接收方都加入类似签名的过程, 能够很好地判断窃听的存在, 并且窃听者只能获取少量的密钥信息, 在保障传输过程安全的同时, 提高了量子密钥分配的效率。

Improved scheme of quantum key distributionbased on BB84 protocol

In order to solve the low transmission efficiency problem of the BB84 protocol in the noisy channel with wiretap inside, this paper proposed an improved scheme. The new scheme added a process, similar to signature, to the sender and the receiver, was able to judge the existence of eavesdropping, and the eavesdropper could only get a small amount of key information. So, the new scheme ensures the safety of the transmission process, at the same time, improves the efficiency of the quantum key distribution.