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

• 作者: Gang Xu Ke Xiao Michael Ryan Xin-Xin Niu Zongpeng Li
• 来源期刊: 计算机、材料和连续体(英文)
• 学科: 物理学
• 关键词: CONTROLLED secure direct communication cluster STATE three-qubit PARTIALLY ENTANGLED STATE entanglement swapping.
• 年，卷（期）: 2019,（3）
• 页码范围: 809-827
• 页数: 19页
• 分类号: O41

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.