A novel controlled bidirectional quantum secure direct communication (CBQSDC) protocol based on Grover’s algorithm is proposed in our paper, which is on the basis of investigating the properties of it. To avoid information leakage, the strategy of adding control-not gate is employed in our protocol. The proposed protocol uses Bell state as quantum resource to transmit information in a dual-quantum-channel. Through the proposed measures, we can not only prevent information leakage, but also improve the efficiency of transmission. As can be shown from the security analysis, the Grover’s algorithm has great application prospects in the research of CBQSDC.

中文翻译：

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基于Grover算法的可控双向量子安全直接通信协议

本文在研究其性质的基础上，提出了一种基于Grover算法的新型受控双向量子安全直接通信（CBQSDC）协议。为了避免信息泄露，我们的协议中采用了添加控制非门的策略。所提出的协议使用贝尔状态作为量子资源在双量子通道中传输信息。通过提出的措施，不仅可以防止信息泄露，还可以提高传输效率。从安全性分析可以看出，Grover算法在CBQSDC的研究中具有很大的应用前景。