Open Access

ARTICLE

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

Gang Xu^1,2,*, Ke Xiao^1,*, Zongpeng Li³, Xin-Xin Niu^2,4, Michael Ryan⁵

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.

* Corresponding Authors: Gang Xu. Email: ;
  Ke Xiao. Email: .

Computers, Materials & Continua 2019, 58(3), 809-827. https://doi.org/10.32604/cmc.2019.04400

Abstract

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.

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Citations