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
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
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.
2005, Vol. 22 
