Implications of Superstrong Nonlocality for Cryptography

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Non-local boxes are hypothetical ``machines'' that give rise to superstrong non-local correlations, leading to a stronger violation of Bell/CHSH inequalities than is possible within the framework of quantum mechanics. We show how non-local boxes can be used to perform any two-party secure computation. We first construct a protocol for bit commitment and then show how to achieve oblivious transfer using non-local boxes. Both have been shown to be impossible using quantum mechanics alone.
15 pages. v3: minor corrections, published version

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/101534

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/quant-ph/0504133
 http://arxiv.org/abs/quant-ph/0504133
 Proceedings of the Royal Society A, 462(2071), pages 1919-1932
 doi:10.1098/rspa.2006.1663

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arXiv