Modified Wigner inequality for secure quantum-key distribution

S. Castelletto; I. P. Degiovanni; M. L. Rastello

doi:10.1103/PhysRevA.67.044303

Modified Wigner inequality for secure quantum-key distribution

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

Phys. Rev. A 67, 044303 – Published 30 April 2003

Abstract

In this paper, 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.

Received 16 October 2002

DOI:https://doi.org/10.1103/PhysRevA.67.044303

Authors & Affiliations

S. Castelletto^*

Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8441

I. P. Degiovanni^† and M. L. Rastello

Istituto Elettrotecnico Nazionale, G. Ferraris, Strada delle Cacce 91-10135, Torino, Italy

^*Permanent address: Istituto Elettrotecnico Nazionale, G. Ferraris, Strada delle Cacce 91, 10135 Torino, Italy. Electronic address: castelle@ien.it
^†Electronic address: degio@ien.it

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Vol. 67, Iss. 4 — April 2003

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