Opaque Attack on Three-Party Quantum Secret Sharing Based on Entanglement

Details Opaque Attack on Three-Party Quantum Secret Sharing Based on Entanglement Opaque Attack on Three-Party Quantum Secret Sharing Based on Entanglement

2007-05-02

arxiv.org/abs/0705.0279v2

Physics

Quantum Physics

4 pages, no figures

Scientific paper

Security of the three-party quantum secret sharing (QSS) schemes based on entanglement and a collective eavesdropping check is analyzed in the case of considerable quantum channel losses. An opaque attack scheme is presented for the dishonest agent to eavesdrop the message obtained by the other agent freely, which reveals that these QSS schemes are insecure for transmission efficiencies lower than 50%, especially when they are used to share an unknown quantum state. Finally, we present a general way to improve the security of QSS schemes for sharing not only a private key but also an unknown quantum state.

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