Controlled Secure Direct Communication Protocol via the Three-Qubit Partially Entangled Set of States  

作　　者：Gang Xu Ke Xiao Zongpeng Li Xin-Xin Niu Michael Ryan 

机构地区：[1]School of Information Science and Technology,North China University of Technology,Beijing,100144,China [2]Information Security Center,State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing,100876,China [3]School of Computer Science,Wuhan University,Hubei,430072,China [4]Guizhou Provincial Key Laboratory of Public Big Data,GuiZhou University,Guiyang,Guizhou,550025,China [5]School of Computing,Dublin City University,Dublin 9,Ireland.

出　　处：《Computers, Materials & Continua》2019年第3期809-827,共19页计算机、材料和连续体（英文）

基　　金：Project supported by NSFC(Grant Nos.61671087,61272514,61170272,61003287,61571335,61628209);the Fok Ying Tong Education Foundation(Grant No.131067);the National Key R&D Program of China under Grant 2017YFB0802300;the Open Foundation of Guizhou Provincial Key Laboratory of Public Big Data(2018BDKFJJ016);Hubei Science Foundation(2016CFA030,2017AAA125)。

摘　　要：In this paper,we first re-examine the previous protocol of controlled quantum secure direct communication of Zhang et al.’s scheme,which was found insecure under two kinds of attacks,fake entangled particles attack and disentanglement attack.Then,by changing the party of the preparation of cluster states and using unitary operations,we present an improved protocol which can avoid these two kinds of attacks.Moreover,the protocol is proposed using the three-qubit partially entangled set of states.It is more efficient by only using three particles rather than four or even more to transmit one bit secret information.Given our using state is much easier to prepare for multiqubit states and our protocol needs less measurement resource,it makes this protocol more convenient from an applied point of view.

关 键 词：Controlled secure direct communication cluster state three-qubit partially entangled state entanglement swapping. 

分 类 号：O41[理学—理论物理]