Reexamining the security of the improved quantum secret sharing scheme |
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| Authors: | Gan Gao |
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| Affiliation: | Department of Electrical Engineering, Tongling University, Tongling 244000, China Engineering Technology Research Center of Optoelectronic Technology Appliance (Cultivating Base), AnHui Province, Tongling University, Tongling 244000, China |
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| Abstract: | We find that, in the improvement [S.J. Qin et al., Phys. Lett. A 357 (2006) 101] of the multiparty quantum secret sharing [Z.J. Zhang et al., Phys. Rev. A 71 (2005) 044301], Charlie can solely obtain Alice’s secret messages without Bob’s helps. In other words, the improved secret sharing scheme is still insecure. In the end, we further modify Qin et al. improved three-party quantum secret sharing scheme and make it really secure. |
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| Keywords: | 03.67.Dd 03.67.Hk 03.67.&minus a |
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