Universally-composable privacy amplification from causality constraints

Details Universally-composable privacy amplification from causality constraints Universally-composable privacy amplification from causality constraints

2008-07-14

arxiv.org/abs/0807.2158v4

Phys. Rev. Lett. 102, 140501 (2009)

Physics

Quantum Physics

4 pages

Scientific paper

We consider schemes for secret key distribution which use as a resource correlations that violate Bell inequalities. We provide the first security proof for such schemes, according to the strongest notion of security, the so called universally-composable security. Our security proof does not rely on the validity of quantum mechanics, it solely relies on the impossibility of arbitrarily-fast signaling between separate physical systems. This allows for secret communication in situations where the participants distrust their quantum devices.

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