Cryptanalysis of an Improved Flexible Ping-Pong Protocol in Perfect and Imperfect Quantum Channels
ZHANG Bin-Bin1, WANG Da-Qing1, HUANG Shan-Shan2, LIU Yu2
1College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 4300742Department of Electronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074
Cryptanalysis of an Improved Flexible Ping-Pong Protocol in Perfect and Imperfect Quantum Channels
ZHANG Bin-Bin1, WANG Da-Qing1, HUANG Shan-Shan2, LIU Yu2
1College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 4300742Department of Electronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074
摘要We recently proposed a flexible quantum secure direct communication protocol [Chin. Phys. Lett. 23(2006)3152]. By analyzing its security in the perfect channel from the aspect of quantum information theory, we find that an eavesdropper is capable of stealing all the information without being detected. Two typical attacks are presented to illustrate this point. A solution to this loophole is also suggested and we show its powerfulness against the most general individual attack in the ideal case. We also discuss the security in the imperfect case when there is noise and loss.
Abstract：We recently proposed a flexible quantum secure direct communication protocol [Chin. Phys. Lett. 23(2006)3152]. By analyzing its security in the perfect channel from the aspect of quantum information theory, we find that an eavesdropper is capable of stealing all the information without being detected. Two typical attacks are presented to illustrate this point. A solution to this loophole is also suggested and we show its powerfulness against the most general individual attack in the ideal case. We also discuss the security in the imperfect case when there is noise and loss.
ZHANG Bin-Bin;WANG Da-Qing;HUANG Shan-Shan;LIU Yu. Cryptanalysis of an Improved Flexible Ping-Pong Protocol in Perfect and Imperfect Quantum Channels[J]. 中国物理快报, 2009, 26(10): 100305-100305.
ZHANG Bin-Bin, WANG Da-Qing, HUANG Shan-Shan, LIU Yu. Cryptanalysis of an Improved Flexible Ping-Pong Protocol in Perfect and Imperfect Quantum Channels. Chin. Phys. Lett., 2009, 26(10): 100305-100305.
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2009, Vol. 26 
