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Phys Rev Lett. 2001 Sep 10;87(11):117901. Epub 2001 Aug 24.

Quantum communication between N partners and Bell's inequalities.

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1
Group of Applied Physics, University of Geneva, 20, rue de l'Ecole-de-M├ędecine, CH-1211 Geneva 4, Switzerland.

Abstract

We consider a family of quantum communication protocols involving N partners. We demonstrate the existence of a link between the security of these protocols against individual attacks by the eavesdropper, and the violation of some Bell's inequalities, generalizing the link that was noticed some years ago for two-partners quantum cryptography. The arguments are independent of the local hidden variable debate.

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