A quantum secure direct communication protocol based on a five-particle cluster state and classical XOR operation

  • In order to transmit secure messages, a quantum secure direct communication protocol based on a five-particle cluster state and classical XOR operation is presented. The five-particle cluster state is used to detect eavesdroppers, and the classical XOR operation serving as a one-time-pad is used to ensure the security of the protocol. In the security analysis, the entropy theory method is introduced, and three detection strategies are compared quantitatively by using the constraint between the information that the eavesdroppers can obtain and the interference introduced. If the eavesdroppers intend to obtain all the information, the detection rate of the original ping-pong protocol is 50%; the second protocol, using two particles of the Einstein-Podolsky-Rosen pair as detection particles, is also 50%; while the presented protocol is 89%. Finally, the security of the proposed protocol is discussed, and the analysis results indicate that the protocol in this paper is more secure than the other two.
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LI Jian, SONG Dan-Jie, GUO Xiao-Jing and JING Bo. A quantum secure direct communication protocol based on a five-particle cluster state and classical XOR operation[J]. Chinese Physics C, 2012, 36(1): 31-36. doi: 10.1088/1674-1137/36/1/005
LI Jian, SONG Dan-Jie, GUO Xiao-Jing and JING Bo. A quantum secure direct communication protocol based on a five-particle cluster state and classical XOR operation[J]. Chinese Physics C, 2012, 36(1): 31-36.  doi: 10.1088/1674-1137/36/1/005 shu
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Received: 2011-03-28
Revised: 2011-05-03
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A quantum secure direct communication protocol based on a five-particle cluster state and classical XOR operation

Abstract: In order to transmit secure messages, a quantum secure direct communication protocol based on a five-particle cluster state and classical XOR operation is presented. The five-particle cluster state is used to detect eavesdroppers, and the classical XOR operation serving as a one-time-pad is used to ensure the security of the protocol. In the security analysis, the entropy theory method is introduced, and three detection strategies are compared quantitatively by using the constraint between the information that the eavesdroppers can obtain and the interference introduced. If the eavesdroppers intend to obtain all the information, the detection rate of the original ping-pong protocol is 50%; the second protocol, using two particles of the Einstein-Podolsky-Rosen pair as detection particles, is also 50%; while the presented protocol is 89%. Finally, the security of the proposed protocol is discussed, and the analysis results indicate that the protocol in this paper is more secure than the other two.

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