: Sher, M.; Musharraf, M.; Magedanz, T.

Abstract
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.