Analyzing and Improving the Secure Quantum Dialogue Protocol Based on Four-Qubit Cluster State
Analyzing and Improving the Secure Quantum Dialogue Protocol Based on Four-Qubit Cluster State
复制标题
基于四量子位簇状态的安全量子对话协议分析与改进
DOI：
10.1007/s10773-020-04485-2
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发表时间：
2020-06-02
影响因子：
1.4
通讯作者：
Chen, Hanwu
中科院分区：
文献类型：
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作者：
Liu, Zhihao;Chen, Hanwu
众所周知，如果一个量子通信协议存在信息泄露问题，那么它就是一个不安全的协议，因此我们应该仔细设计协议以避免信息泄露问题。不幸的是，我们发现这个问题存在于“基于四量子位簇状态的安全量子对话（QD）协议”中。发现交换的信息有一半泄露了。为了弥补这个问题，给出了两种改进方法。这表明改进的QD协议成功地避免了信息泄漏问题。特别是，进一步改进的QD协议仅需要单粒子测量而不是贝尔基测量，并且不需要执行任何单一操作。此外，通信效率较原QD协议提升至1.33倍。
As we know, if a quantum communication protocol has the information leakage problem, it is an insecure protocol, so we should carefully design the protocol to avoid the information leakage problem. Unfortunately, we find this problem exists in the "secure quantum dialogue (QD) protocol based on four-qubit cluster state". It is found that half of the exchanged information leaks out. To make up this problem, two ways to improve it is given. It shows that the improved QD protocols successfully avoid the information leakage problem. Especially, the further improved QD protocol only needs the single particle measurement instead of Bell-basis measurement and doesn't need any unitary operation to be performed. In addition, the communication efficiency is improved to 1.33 times of the original QD protocol.