期刊
SCIENCE BULLETIN
卷 65, 期 1, 页码 12-20出版社
ELSEVIER
DOI: 10.1016/j.scib.2019.10.025
关键词
Quantum cryptography; Device-independent quantum secure direct communication; Information security; Communication efficiency
资金
- National Natural Science Foundation of China [11974189, 11974205]
- China Postdoctoral Science Foundation [2018M642293]
- Open Research Fund of the Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education [JZNY201908]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Device-independent not only represents a relaxation of the security assumptions about the internal working of the quantum devices, but also can enhance the security of the quantum communication. In the paper, we put forward the first device-independent quantum secure direct communication (DIQSDC) protocol and analyze its security and communication efficiency against collective attacks. Under practical noisy quantum channel condition, the photon transmission loss and photon state decoherence would reduce DI-QSDC's communication quality and threaten its absolute security. For solving the photon transmission loss and decoherence problems, we adopt noiseless linear amplification (NLA) protocol and entanglement purification protocol (EPP) to modify the DI-QSDC protocol. With the help of the NLA and EPP, we can guarantee DI-QSDC's absolute security and effectively improve its communication quality. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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