Modern Physics Letters BComment on “Efficient quantum dialogue without information leakage”Gan GaoPublished Jul 26, 2018• 3 citationsPublisherAbstractIn this comment, we show that the efficiency of the proposed quantum dialogue scheme in the paper [Mod. Phys. Lett. B 29 (2015) 1550018 ] cannot reach 100%, but 66.7%.DOI10.1142/s0217984918750015