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，它能够在无需预先密钥加密的情况下实现消息的安全传输。然而，传统的量子通信协议依赖于实现协议所用设备的安全性和可信度，这些设备可能容易受到攻击。相比之下，设备无关（DI）量子协议旨在利用量子力学的基本原理，确保量子通信的安全性不受所用设备的影响。在本研究论文中，我们提出了首个包含用户身份认证的DI-QSDC协议，该协议能够在消息交换前确认发送方和接收方的真实性。我们还将此方法扩展至DI量子对话（QD）协议，在该协议中，双方在完成相互认证后均可发送秘密消息。