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Randomized quantum key distribution
|Journal of optical communications 27 (2006), Nr.5, S.278-281|
|Fraunhofer FOKUS ()|
By using entangled photon pairs in random polarizations, a protocol that can be used to distribute a quantum key and detect eavesdropping simultaneously is presented. In this scheme, four local unitary operations and the Bell state measurement are used. The non-requirement of classical channel and random selection of polarization basis make this protocol perfectly secure. The stability of this scheme against certain security attacks is also analyzed.