Comment on “Quantum secret sharing based on reusable Greenberger-Horne-Zeilinger states as secure carriers”
Fei Gao, Fen-Zhuo Guo, Qiaoyan Wen, Fu-Chen Zhu · Physical Review A · 2005
In a recent paper [S. Bagherinezhad and V. Karimipour, Phys. Rev. A 67, 044302 (2003)], a quantum secret sharing protocol based on reusable Greenberger-Horne-Zeilinger states was proposed. However, in this Comment, it is shown that this protocol is insecure if Eve employs a special strategy to attack.