摘要
Two quantum secret sharing(QSS)protocols in a multiuser quantum direct communication(QDC)network system were put forward by Hong et al.[Chin.Phys.Lett.29(2012)050303].However,we find that either agent(Bob or Charlie)alone can obtain half the information about the sender's secret without collaboration with the other,which does not satisfy the security requirement of QSS.Moreover,the secret message sent by Alice in the second protocol can be eavesdropped on or its communication can be disturbed by the builder of quantum channels(Trent).
作者
LIU Zhi-Hao
CHEN Han-Wu
LIU Wen-Jie
XU Juan
刘志昊;陈汉武;刘文杰;许娟(School of Computer Science and Engineering,Southeast University,Nanjing 211189;School of Computer and Software,Nanjing University of Information Science&Technology,Nanjing 210044)
基金
Supported by the National Natural Science Foundation under Grant Nos 61170321,61103235
the Research Fund for the Doctoral Program of Higher Education under Grant No 20110092110024。
