Abstract
Recently, Chen et al. [Quant Inf Proc doi: 10.1007/s11128-012-0505-5] presented a very promising quantum private comparison protocol for two participants to compare the equality of their wealth secretly—no one, except the participants, can reveal the comparison result. This paper points out that a malicious participant can reveal portion of the other participant’s secret information. Furthermore, an improvement is also proposed.
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This research is partially supported by the National Science Council, Taiwan, R.O.C., under the Contract No. NSC 100-2221-E-006-152-MY3.
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Yang, CW., Kao, SH. & Hwang, T. Comment on “Efficient and feasible quantum private comparison of equality against the collective amplitude damping noise”. Quantum Inf Process 12, 2871–2875 (2013). https://doi.org/10.1007/s11128-013-0569-x
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DOI: https://doi.org/10.1007/s11128-013-0569-x