TY - JOUR
T1 - Improved QSDC Protocol over a Collective-Dephasing Noise Channel
AU - Yang, Chun Wei
AU - Hwang, Tzonelih
N1 - Funding Information:
Acknowledgements We would like to thank the anonymous reviewers for their very valuable comments, which greatly enhanced the clarity of this paper. We would also like to thank the National Science Council of Republic of China and the Research Center for Quantum Communication and Security, National Cheng Kung University, Taiwan, Republic of China, for the financial support of this research under Contract No. NSC 100-2221-E-006-152-MY3 and D100-36002, respectively.
PY - 2012/12
Y1 - 2012/12
N2 - Recently, Ge and Liu (Chin. Phys. Lett. 24(10):2727-2729, 2007) proposed a quantum secure direct communication (QSDC) protocol using a decoherence-free subspace (DFS) against collective-dephasing noise. Users of their protocol can directly recover the secret message after quantum transmission without transmission of any additional classical information except for the eavesdropping check. This study points out a pitfall in Ge and Liu's scheme, in which an eavesdropper can deliberately modify the message without being detected. Furthermore, an enhanced scheme is proposed to avoid the modification attack and to improve the qubit efficiency from 8. 3 % to 12. 5 %.
AB - Recently, Ge and Liu (Chin. Phys. Lett. 24(10):2727-2729, 2007) proposed a quantum secure direct communication (QSDC) protocol using a decoherence-free subspace (DFS) against collective-dephasing noise. Users of their protocol can directly recover the secret message after quantum transmission without transmission of any additional classical information except for the eavesdropping check. This study points out a pitfall in Ge and Liu's scheme, in which an eavesdropper can deliberately modify the message without being detected. Furthermore, an enhanced scheme is proposed to avoid the modification attack and to improve the qubit efficiency from 8. 3 % to 12. 5 %.
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U2 - 10.1007/s10773-012-1286-4
DO - 10.1007/s10773-012-1286-4
M3 - Article
AN - SCOPUS:84868366555
SN - 0020-7748
VL - 51
SP - 3941
EP - 3950
JO - International Journal of Theoretical Physics
JF - International Journal of Theoretical Physics
IS - 12
ER -