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.
引用
收藏
页码：1354 / 1361
页数：7
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