Cryptanalysis and Improvement of a Multi-User Quantum Communication Network Using χ-Type Entangled States

被引：0
|
作者：
Wei Huang
Hui-Juan Zuo
Yan-Bing Li
机构：
[1] Beijing University of Posts and Telecommunications,State Key Laboratory of Networking and Switching Technology
[2] Chinese Academy of Sciences,State Key Laboratory of Information Security, Institute of Software
[3] Hebei Normal University,Mathematics and Information Science College
[4] Beijing Electronic Science and Technology Institute,undefined
来源：
International Journal of Theoretical Physics | 2013年 / 52卷
关键词：
Quantum communication network; -Type entangled state; Cryptanalysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The security of a multi-user quantum communication network protocol using χ-type entangled states (Chang et al., J. Korean Phys. Soc. 61:1–5, 2012) is analyzed. We find that, by using one χ-type state in this protocol, two participants can only share 2 bits of information, not 4 bits as the authors stated. In addition, we give a special attack strategy by which an eavesdropper can elicit half of the secret information without being detected. Finally, we improve the protocol to be secure against all the present attacks.
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页码：1354 / 1361
页数：7
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