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Optics Communications

Comment on “Eavesdropping on the improved three-party quantum secret sharing protocol”

Tian‐Yin Wang, Qiaoyan Wen

Published Apr 18, 2011• 6 citations
Publisher
DOI
10.1016/j.optcom.2011.03.081

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We describe and experimentally demonstrate a more practical three-party quantum secret sharing (QSS) protocol using polarization-entangled photon pairs. The source itself serves as an active participant and can switch between the required photon states by modulating the pump beam only, thereby making the protocol less susceptible to loss and amenable to fast switching. We derive a security proof based on quantum key distribution, demonstrating our QSS protocol to be secure against both eavesdropping and dishonest participants. Compared to three-photon protocols, the practical efficiency is dramatically improved as there is no need to generate, transmit, or detect a third photon.