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Information leak in Liu et al.’s quantum private comparison and a new protocol

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Abstract

In a recent paper [W. Liu, Y.B. Wang, Z.T. Jiang, Opt. Commun. 284, 3160 (2011)], a quantum private comparison (QPC) protocol based on W states was presented. Compared to the previous QPCs, the protocol is promising for that it can prevent the comparison result from revealing to the third party. However, this study point out that a flaw of information leak is existent in the protocol. And a new QPC which can avoid the flaw and has higher efficiency is proposed in this paper.

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Correspondence to Y. B. Li.

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Li, Y.B., Wen, Q.Y., Gao, F. et al. Information leak in Liu et al.’s quantum private comparison and a new protocol. Eur. Phys. J. D 66, 110 (2012). https://doi.org/10.1140/epjd/e2012-30065-9

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  • DOI: https://doi.org/10.1140/epjd/e2012-30065-9

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