dorsal/arxiv
View SchemaQuantum secure conditional direct communication via EPR pairs
| Authors | Ting Gao, Feng-Li Yan, Zhi-Xi Wang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0501130 |
| URL | https://arxiv.org/abs/quant-ph/0501130 |
| DOI | 10.1142/S0129183105007881 |
| Journal | International Journal of Modern Physics C, Vol.16, No. 8 (2005) 1293 |
Abstract
Two schemes for quantum secure conditional direct communication are proposed, where a set of EPR pairs of maximally entangled particles in Bell states, initially made by the supervisor Charlie, but shared by the sender Alice and the receiver Bob, functions as quantum information channels for faithful transmission. After insuring the security of the quantum channel and obtaining the permission of Charlie (i.e. Charlie is trustworthy and cooperative, which means the 'conditional' in the two schemes), Alice and Bob begin their private communication under the control of Charlie. In the first scheme, Alice transmits secret message to Bob in a deterministic manner with the help of Charlie by means of Alice's local unitary transformations, both Alice and Bob's local measurements, and both of Alice and Charlie's public classical communication. In the second scheme, the secure communication between Alice and Bob can be achieved via public classical communication of Charlie and Alice, and the local measurements of both Alice and Bob. The common feature of these protocols is that the communications between two communication parties Alice and Bob depend on the agreement of the third side Charlie. Moreover, transmitting one bit secret message, the sender Alice only needs to apply a local operation on her one qubit and send one bit classical information. We also show that the two schemes are completely secure if quantum channels are perfect.
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"abstract": "Two schemes for quantum secure conditional direct communication are proposed,\nwhere a set of EPR pairs of maximally entangled particles in Bell states,\ninitially made by the supervisor Charlie, but shared by the sender Alice and\nthe receiver Bob, functions as quantum information channels for faithful\ntransmission. After insuring the security of the quantum channel and obtaining\nthe permission of Charlie (i.e. Charlie is trustworthy and cooperative, which\nmeans the \u0027conditional\u0027 in the two schemes), Alice and Bob begin their private\ncommunication under the control of Charlie. In the first scheme, Alice\ntransmits secret message to Bob in a deterministic manner with the help of\nCharlie by means of Alice\u0027s local unitary transformations, both Alice and Bob\u0027s\nlocal measurements, and both of Alice and Charlie\u0027s public classical\ncommunication. In the second scheme, the secure communication between Alice and\nBob can be achieved via public classical communication of Charlie and Alice,\nand the local measurements of both Alice and Bob. The common feature of these\nprotocols is that the communications between two communication parties Alice\nand Bob depend on the agreement of the third side Charlie. Moreover,\ntransmitting one bit secret message, the sender Alice only needs to apply a\nlocal operation on her one qubit and send one bit classical information. We\nalso show that the two schemes are completely secure if quantum channels are\nperfect.",
"arxiv_id": "quant-ph/0501130",
"authors": [
"Ting Gao",
"Feng-Li Yan",
"Zhi-Xi Wang"
],
"categories": [
"quant-ph"
],
"doi": "10.1142/S0129183105007881",
"journal_ref": "International Journal of Modern Physics C, Vol.16, No. 8 (2005)\n 1293",
"title": "Quantum secure conditional direct communication via EPR pairs",
"url": "https://arxiv.org/abs/quant-ph/0501130"
},
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