Thursday, July 8, 2010

Could some entangled states be useless for quantum cryptography ?

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One of the widely accepted properties of quantum entanglement is secrecy. Since scientists and researchers began working with quantum key distribution, entanglement has been considered an essential part of keeping communications private. What if entanglement didn't always mean secrecy, though ? New work is shedding light on the nature of entanglement and quantum key distribution -  and possibly proving that a high degree of entanglement does not necessarily lead to complete secrecy .

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