A Modified Wigner's Inequality for Secure Quantum Key Distribution

Abstract

In this report we discuss the insecurity with present implementations of the Ekert protocol for quantum-key distribution based on the Wigner Inequality. We propose a modified version of this inequality which guarantees safe quantum-key distribution.

5 pages, 2 figures, a revised version will appear on PRA

References in corpus (6)

• Quantum Cryptography
• Security Aspects of Practical 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

Cited by in corpus (6)

• Inequivalent Leggett-Garg inequalities
• Multipartite Bell-type Inequality by Generalizing Wigner's Argument
• Bipartite qutrit local realist inequalities and the robustness of their quantum mechanical violation
• Quantum Correlation Bounds for Quantum Information Experiments Optimization: the Wigner Inequality Case
• Experimental Eavesdropping Attack against Ekert's Protocol based on Wigner's Inequality
• Wigner's approach enabled detection of multipartite nonlocality using all different bipartitions