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Physics  2003 

Experimental Eavesdropping Attack against Ekert's Protocol based on Wigner's Inequality

DOI: 10.1103/PhysRevA.68.034309

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We experimentally implemented an eavesdropping attack against the Ekert protocol for quantum key distribution based on the Wigner inequality. We demonstrate a serious lack of security of this protocol when the eavesdropper gains total control of the source. In addition we tested a modified Wigner inequality which should guarantee a secure quantum key distribution.


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