Secret keys and random numbers from quantum non locality
Non local correlations are obtained when local measurements are carried out on entangled quantum particles, leading to a violation of a Bell inequality. We discuss how such non local correlations shared can be used to generate random numbers and secret keys. Using non locality allows a higher degree of security than in the more traditional approaches to quantum cryptography, as it is no longer necessary to trust one's devices, nor even to trust quantum mechanics. We will briefly present the first experimental realization of these proposals, carried out at JQI/Maryland.
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