Quantum secure direct communication (QSDC) enables direct message transmission over quantum channels. Loopholes involved in practical apparatus, particularly nonideal measurement devices, provide a potential interface for attacking practical quantum communication. Measurement-device–independent (MDI) QSDC protocols deal with all side-channel attacks on practical measurement devices and directly transmit secret messages over classical channels with both integrity and eavesdropper detection and prevention. We review the recent development of MDI QSDC protocols using both single photons and entangled photon pairs. These two types of MDI QSDC protocols are useful for their respective distinct characters and can be generalized to perform more interesting communication networks.

中文翻译：

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与测量设备无关的量子安全直接通信：与不完善的测量设备和不受信任的操作员进行直接量子通信

量子安全直接通信（QSDC）支持通过量子通道进行直接消息传输。实际设备特别是非理想测量设备中涉及的漏洞为攻击实际量子通信提供了潜在的接口。独立于测量设备（MDI）的QSDC协议可处理实际测量设备上的所有侧信道攻击，并通过完整性，窃听者检测和预防功能直接在传统信道上传输秘密消息。我们回顾了使用单光子和纠缠光子对的MDI QSDC协议的最新发展。这两种类型的MDI QSDC协议可用于它们各自不同的特征，并且可以被概括为执行更有趣的通信网络。