Comment II on “Quantum secret sharing based on reusable Greenberger-Horne-Zeilinger states as secure carriers”
DU Jian-zhong, Su‐Juan Qin, Qiaoyan Wen +1 more
In a recent paper [S. Bagherinezhad and V. Karimipour, Phys. Rev. A 67, 044302 (2003)], a quantum secret sharing protocol based on reusable GHZ states was proposed. However, in this comment, it is shown that this protocol is insecure because a cheater can gain all the secret bits before sharing, while introducing one data bit error at most in the whole communication, which makes the cheater avoid the detection by the communication parities.
arXiv:quant-ph/0605088•Physical Review A•Jul 21, 2006•5 citations