论文标题
测量设备与独立量子安全直接通信的安全分析
Security Analysis of Measurement-device-independent Quantum Secure Direct Communication
论文作者
论文摘要
量子安全直接通信（QSDC）是量子通信的重要分支，它直接在量子通道中直接传输机密消息而无需使用加密和解密。它不仅可以防止在传输过程中窃听，还可以消除与钥匙存储和管理相关的安全漏洞。最近已经构建了使用不完美的测量设备的不信任方执行测量的测量设备不依赖性（MDI）QSDC协议，其中构建了未经信任的一方，而MDI-QSDC消除了源自测量设备中不完美设备的安全漏洞，因此启用了QSDC与当前技术的应用。在本文中，我们完成了MDI-QSDC的定量安全分析。得出安全能力，并给出了其下限。发现MDI-QSDC保密能力仅略低于使用完美测量设备的QSDC。因此，通过当前的测量设备可以通过少量的能力牺牲QSDC。
Quantum secure direct communication (QSDC) is an important branch of quantum communication that transmits confidential message directly in a quantum channel without utilizing encryption and decryption. It not only prevents eavesdropping during transmission, but also eliminates the security loophole associated with key storage and management. Recently measurement-device-independent (MDI) QSDC protocols in which the measurement is performed by an untrusted party using imperfect measurement devices have been constructed, and MDI-QSDC eliminates the security loopholes originating from the imperfections in measurement devices so that enable application of QSDC with current technology. In this paper, we complete the quantitative security analysis of the MDI-QSDC. The security capacity is derived, and its lower bound is given. It is found that the MDI-QSDC secrecy capacity is only slightly lower than that of QSDC utilizing perfect measurement devices. Therefore QSDC is possible with current measurement devices by sacrificing a small amount in the capacity.
