Physics – Quantum Physics
Scientific paper
2011-10-25
Physics
Quantum Physics
14 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:quant-ph/0308173 by different authors
Scientific paper
In order to improve the eavesdropping detection efficiency in two-step quantum direct communication protocol, an improved eavesdropping detection strategy using four-particle GHZ state is proposed, in which four-particle GHZ state is used to detect eavesdroppers. During the security analysis, the method of the entropy theory is introduced, and two detection strategies are compared quantitatively by using the constraint between the information which eavesdropper can obtain and the interference introduced. If the eavesdroppers intend to obtain all information, the eavesdropping detection rate of the original two-step quantum direct communication protocol by using EPR pair block as detection particles is 50%; while the proposed strategy's detection rate is 88%. In the end, the security of the proposed protocol is discussed. The analysis results show that the eavesdropping detection strategy presented is more secure.
Jin Haifei
Jing Bo
Li Jian
No associations
LandOfFree
Improved Eavesdropping Detection Strategy in Quantum Direct Communication Protocol Based on Four-particle GHZ State does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Improved Eavesdropping Detection Strategy in Quantum Direct Communication Protocol Based on Four-particle GHZ State, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improved Eavesdropping Detection Strategy in Quantum Direct Communication Protocol Based on Four-particle GHZ State will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-94485