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A Simultaneous Quantum Secure Direct Communication Scheme between the Central Party and Other M Parties |
| GAO Ting1,2,3;YAN Feng-Li3,4;WANG Zhi-Xi2 |
| 1College of Mathematics and Information Science, Hebei Normal University, Shijiazhuang 050016
2Department of Mathematics, Capital Normal University, Beijing 100037
3CCAST (World Laboratory), PO Box 8730, Beijing 100080
4College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050016 |
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| Cite this article: |
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GAO Ting, YAN Feng-Li, WANG Zhi-Xi 2005 Chin. Phys. Lett. 22 2473-2476 |
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Abstract We propose a simultaneous quantum secure direct communication scheme between one party and other three parties via four-particle GHZ states and swapping quantum entanglement. In the scheme, three spatially separated senders, Alice, Bob and Charlie, transmit their secret messages to a remote receiver Diana by performing a series of local operations on their respective particles according to the quadripartite stipulation. From Alice, Bob, Charlie and Diana’s Bell measurement results, Diana can infer the secret messages. If a perfect quantum channel is used, the secret messages are faithfully transmitted from Alice, Bob and Charlie to Diana via initially shared pairs of four-particle GHZ states without revealing any information to a potential eavesdropper. As there is no transmission of the qubits carrying the secret message in the public channel, it is completely secure for the direct secret communication. This scheme can be considered as a network of communication parties where each party wants to communicate secretly with a central party or server.
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| Keywords:
03.67.Dd
03.67.Hk
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Published: 01 October 2005
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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