We show a potential eavesdropper can eavesdrop whole secret information when the legitimate users use secure carrier to encode and decode classical information repeatedly in the protocol [proposed in Bagherinezhad S and Karimipour V 2003 Phys. Rev. A \textbf{67} 044302]. Then we present a revised quantum secret sharing protocol by using Greenberger-Horne-Zeilinger state as secure carrier. Our protocol can resist Eve's attack.
@article{arxiv.quant-ph/0605065,
title = {Secure Quantum Secret Sharing Based on Reusable GHZ States as Secure Carriers},
author = {Jie Song and Shou Zhang},
journal= {arXiv preprint arXiv:quant-ph/0605065},
year = {2009}
}