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.
Quantum Information Processing – Springer Journals
Published: Mar 29, 2013
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