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.
@article{arxiv.quant-ph/0308030,
title = {Experimental Eavesdropping Attack against Ekert's Protocol based on Wigner's Inequality},
author = {F. A. Bovino and A. M. Colla and G. Castagnoli and S. Castelletto and I. P. Degiovanni and M. L. Rastello},
journal= {arXiv preprint arXiv:quant-ph/0308030},
year = {2009}
}
Comments
RevTex style, 5 pages, 6 figures, to appear on PRA with minor revision