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

doi:10.1103/PhysRevA.68.034309

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, and M. L. Rastello

Phys. Rev. A 68, 034309 – Published 29 September 2003

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.

Received 28 April 2003

DOI:https://doi.org/10.1103/PhysRevA.68.034309

Authors & Affiliations

F. A. Bovino^*, A. M. Colla, and G. Castagnoli

Elsag S.p.A., Via Puccini 2, 16154 Genova, Italy

S. Castelletto, I. P. Degiovanni^†, and M. L. Rastello

Istituto Elettrotecnico Nazionale Galileo Ferraris, Strada delle Cacce 91, 10135 Torino, Italy

^*Electronic address: Fabio.Bovino@elsag.it
^†Electronic address: degio@ien.it

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Vol. 68, Iss. 3 — September 2003

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