From Bell's Theorem to Secure Quantum Key Distribution

Details From Bell's Theorem to Secure Quantum Key Distribution From Bell's Theorem to Secure Quantum Key Distribution

2005-10-13

arxiv.org/abs/quant-ph/0510094v1

Phys. Rev. Lett. 97, 120405 (2006)

Physics

Quantum Physics

5 pages, 2 figures, REVTEX4

Scientific paper

10.1103/PhysRevLett.97.120405

Any Quantum Key Distribution (QKD) protocol consists first of sequences of measurements that produce some correlation between classical data. We show that these correlation data must violate some Bell inequality in order to contain distillable secrecy, if not they could be produced by quantum measurements performed on a separable state of larger dimension. We introduce a new QKD protocol and prove its security against any individual attack by an adversary only limited by the no-signaling condition.

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