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

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.

RevTex style, 5 pages, 6 figures, to appear on PRA with minor revision

References in corpus (6)

• Quantum Cryptography
• Quantum Cryptography with Entangled Photons
• Quantum Cryptography using entangled photons in energy-time Bell states
• Entangled state quantum cryptography: Eavesdropping on the Ekert protocol
• Practical free-space quantum key distribution over 1 km
• A Modified Wigner's Inequality for Secure Quantum Key Distribution

Cited by in corpus (1)

• Quantum Correlation Bounds for Quantum Information Experiments Optimization: the Wigner Inequality Case