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In this comment, we show that the special attack [S.-J. Qin, F. Gao, Q.-Y.Wen, F.-C. Zhu, Opt. Commun. 281 (2008) 5472.], which claims to be able toobtain all the transmitted secret message bit values of the protocol of themultiparty quantum secret sharing of secure direct communication using singlephotons with random phase shift operations, fails. Furthermore, a class ofsimilar attacks are also shown to fail to extract the secrete message.

Comment on "A special attack on the multiparty quantum secret sharing of secure direct communication using single photons"