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An Eavesdropping Detecting Approach Based on Mode--Mode Correlation |
| XIONG Jin;ZENG Gui-Hua;ZHOU Nan-Run |
| The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240 |
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| Cite this article: |
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XIONG Jin, ZENG Gui-Hua, ZHOU Nan-Run 2005 Chin. Phys. Lett. 22 2748-2750 |
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Abstract We find that second-order coherence as well as a Hanbury--Brown--Twiss intensity interferometer may provide an optimal approach for eavesdropping detection in the quantum key distribution based on two-mode squeezed vacuum states. With this approach, eavesdropping can be easily detected without sacrificing extra secret bits as the test key. In addition, the efficiency of the quantum key distribution protocol is enhanced greatly.
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| Keywords:
03.67.Dd
42.50.Dv
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Published: 01 November 2005
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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42.50.Dv
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(Quantum state engineering and measurements)
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