Quantum Secure Direct Communication (QSDC) is an important branch of quantum cryptography, which enables the secure transmission of messages without prior key encryption. However, traditional quantum communication protocols rely on the security and trustworthiness of the devices employed to implement the protocols, which can be susceptible to attacks. Device-independent (DI) quantum protocols, on the other hand, aim to secure quantum communication independent of the devices used by leveraging fundamental principles of quantum mechanics. In this research paper, we introduce the first DI-QSDC protocol that includes user identity authentication to establish the authenticity of both sender and receiver before message exchange. We also extend this approach to a DI Quantum Dialogue (QD) protocol where both parties can send secret messages upon mutual authentication.
翻译:量子安全直接通信(QSDC)是量子密码学的重要分支,它使得不需要事先加密密钥就能安全传输消息成为可能。然而,传统的量子通信协议依赖于实施协议的设备的安全性和可信度,这些设备容易受到攻击。与此不同的是,无设备(DI)量子协议利用量子力学的基本原理来保护量子通信的安全独立于所使用的设备。在本研究论文中,我们提出了第一个包括用户身份认证的DI-QSDC协议,以建立发送方和接收方的真实性。同时,我们还将该方法扩展到DI量子对话(QD)协议中,在彼此经过身份认证后双方可以发送秘密消息。