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Quantum Overloading Cryptography Using Single-Photon Nonlocality |
| TAN Yong-Gang1,2;CAI Qing-Yu1;SHI Ting-Yun1 |
| 1State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 4300712Graduate School of the Chinese Academy of Sciences, Beijing 100049 |
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| Cite this article: |
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TAN Yong-Gang, CAI Qing-Yu, SHI Ting-Yun 2007 Chin. Phys. Lett. 24 2177-2180 |
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Abstract Using the single-photon nonlocality, we propose a quantum novel overloading cryptography scheme, in which a single photon carries two bits information in one-way quantum channel. Two commutative modes of the single photon, the polarization mode and the spatial mode, are used to encode secret information. Strict time windows are set to detect the impersonation attack. The spatial mode which denotes the existence of photons is noncommutative with the phase of the photon, so that our scheme is secure against photon-number-splitting attack. Our protocol may be secure against individual attack.
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| Keywords:
03.67.Dd
03.65.Ud
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Received: 12 March 2007
Published: 25 July 2007
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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