A scheme of multiparty quantum secret sharing of classical messages (QSSCM) (Z.J. Zhang et al., Opt. Commun. 269 (2007) 418) was proposed. Lin et al. (S. Lin et al., Opt. Commun. 281 (2008) 4553) showed the last agent can obtain half of the secret in Z.J. Zhang's et al. three-party QSSCM scheme and gave an improved version. We further show the first agent and the last agent can obtain all the secret without introducing any error in Zhang's et al. multiparty QSSCM scheme by a special attack with quantum teleportation. We also present an improved version.
Physics Letters A – Elsevier
Published: Dec 22, 2008
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