Security of quantum secure direct communication based on Wyner's wiretap channel theory

Quantum EngineeringVolume 1, Issue 4 e26 ORIGINAL PAPER Security of quantum secure direct communication based on Wyner's wiretap channel theory Jiawei Wu, Jiawei Wu orcid.org/0000-0001-7340-7846 State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, ChinaSearch for more papers by this authorZaisheng Lin, Corresponding Author Zaisheng Lin bazingalzs137@mail.tsinghua.edu.cn School of Information and Technology, Tsinghua University, Beijing, China Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, China Zaisheng Lin, School of Information and Technology, Tsinghua University, Beijing 100084, China. Email: bazingalzs137@mail.tsinghua.edu.cnSearch for more papers by this authorLiuguo Yin, Liuguo Yin orcid.org/0000-0002-4441-9490 School of Information and Technology, Tsinghua University, Beijing, China Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, ChinaSearch for more papers by this authorGui-Lu Long, Gui-Lu Long orcid.org/0000-0002-9023-1579 State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, China Innovative Center of Quantum Matter, Beijing, China Beijing Academy of Quantum Information Science, Beijing, ChinaSearch for more papers by this author Jiawei Wu, Jiawei Wu orcid.org/0000-0001-7340-7846 State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, ChinaSearch for more papers by this authorZaisheng Lin, Corresponding Author Zaisheng Lin bazingalzs137@mail.tsinghua.edu.cn School of Information and Technology, Tsinghua University, Beijing, China Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, China Zaisheng Lin, School of Information and Technology, Tsinghua University, Beijing 100084, China. Email: bazingalzs137@mail.tsinghua.edu.cnSearch for more papers by this authorLiuguo Yin, Liuguo Yin orcid.org/0000-0002-4441-9490 School of Information and Technology, Tsinghua University, Beijing, China Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, ChinaSearch for more papers by this authorGui-Lu Long, Gui-Lu Long orcid.org/0000-0002-9023-1579 State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, China Innovative Center of Quantum Matter, Beijing, China Beijing Academy of Quantum Information Science, Beijing, ChinaSearch for more papers by this author First published: 29 October 2019 https://doi.org/10.1002/que2.26Citations: 59Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Summary Quantum secure direct communication (QSDC) transmits secret messages directly over a quantum channel without the prior distribution of a key. Here, we apply Wyner's wiretap channel theory to analyze the security of QSDC protocols. The ideal protocol is treated as the main channel, and the effect of eavesdropping is treated as the wiretap channel. Entanglement-based QSDC protocols are analyzed in detail at first. We calculated the channel capacity of the wiretap channel, and hence, the secrecy channel capacity of the protocol. The security of single-photon–based QSDC protocols is studied through the equivalence between the entanglement-based protocols and single-photon–based protocols. We present a modified version of the single-photon-based DL04 protocol, which gives a higher secrecy capacity. Citing Literature Volume1, Issue4December 2019e26 RelatedInformation