Enhanced Multiparty Controlled QSDC Using GHZ State  

作　　者：高士闳 蔡家纬 黄宗立 

机构地区：[1]Department of Computer Science and Information Engineering,National Cheng Kung University [2]Department of Physics,National Cheng Kung University

出　　处：《Communications in Theoretical Physics》2011年第6期1007-1011,共5页理论物理通讯（英文版）

摘　　要：Recently, Gao et al. [Opt. Commun. 283 （2010） 192] pointed out that Wang et al,＇s multiparty controlled quantum secure direct communication （CQSDC） protocol [Opt. Commun. 266 （2006） 732] has the information leakage problem and proposed an improved protocol. However, in the improved protocol, due to the introduction of an additional random sampling to avoid the weakness, the qubit efficiency is decreased. By introducing the base changing technique to the random sampling in Wang et al. ＇s protocol, this study overcomes the information leakage problem and provides a better qubit efficiency.

关 键 词：quantum secure direct communication random sampling 

分 类 号：O431.2[机械工程—光学工程]