Side Channel Passive Quantum Key Distribution with One Uninformative State |
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Authors: | Guo-Dong Kang Qing-Ping Zhou Mao-Fa Fang |
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Affiliation: | 1.Key Laboratory of Software Engineering of Ministry of Education, and School of Software and Service Outsourcing,JiShou University,Zhangjiajie,China;2.Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics,Hunan Normal University,Changsha,China |
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Abstract: | In most of quantum key distribution schemes, real random number generators are required on both sides for preparation and measurement bases choice. In this paper, via entangled photon pairs, we present a side channel passive quantum key distribution scheme, in which random number generator is unneeded on the receiver side. On the sender Alice side, along with massive of signal photons, small amount of uninformative photons are randomly sent to her partner Bob for eavesdropper-presence testing and error estimation. While on the other side channel, without using random number generator Bob do not actively measure the income signals randomly in two non-orthogonal bases. Instead, he just passively register photon click events, in two settled symmetric (i.e.X) bases, and the raw key(click events) is the probable outcomes of a special quantum measurement module constructed by Alice and Bob. Further, security analysis and formulas of security bounds for this scheme is also investigated under reasonable assumptions. Our work shows that the uninformative state employed in this paper is powerful to fight against eavesdropper Eve. |
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