Experimental Eavesdropping Attack against Ekert's Protocol based on Wigner's Inequality
F. A. Bovino, A. M. Colla, G. Castagnoli, S. Castelletto, I. P. Degiovanni, M. L. Rastello
Abstract
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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