Quantum direct communication with authentication

被引：200

作者：

Lee, H ^{[1
]}

Lim, J

Yang, H

机构：

[1] Korea Univ, Ctr Informat Secur Technol, Seoul 136701, South Korea

[2] Korea Univ, Grad Sch Informat Secur, Seoul 136701, South Korea

[3] Korea Univ, Dept Phys, Chungnam, South Korea

[4] Univ Vienna, Inst Phys Expt, A-1010 Vienna, Austria

来源：

PHYSICAL REVIEW A | 2006年 / 73卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.73.042305

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose two quantum direct communication (QDC) protocols with user authentication. Users can identify each other by checking the correlation of Greenberger-Horne-Zeilinger (GHZ) states. Alice can directly send a secret message to Bob without any previously shared secret using the remaining GHZ states after authentication. Our second QDC protocol can be used even though there is no quantum link between Alice and Bob. The security of the transmitted message is guaranteed by properties of entanglement of GHZ states.

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