Threshold Quantum Secret Sharing of Secure Direct Communication
LI Bao-Kui1, YANG Yu-Guang2,3,4, WEN Qiao-Yan5
1Department of Automatic Control School of Information Science and Technology, Beijing Institute of Technology, Beijing 1000812College of Computer Science and Technology, Beijing University of Technology, Beijing 1001243State Key Laboratory of Integrated Services Network, Xidian University, Xi'an 7100714State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing 1000495State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876
Threshold Quantum Secret Sharing of Secure Direct Communication
LI Bao-Kui1, YANG Yu-Guang2,3,4, WEN Qiao-Yan5
1Department of Automatic Control School of Information Science and Technology, Beijing Institute of Technology, Beijing 1000812College of Computer Science and Technology, Beijing University of Technology, Beijing 1001243State Key Laboratory of Integrated Services Network, Xidian University, Xi'an 7100714State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing 1000495State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876
摘要We propose a (t,n)-threshold quantum secret sharing protocol of secure direct communication following some ideas of Zhang's protocol [Phys. Lett. A 342 (2005) 60] and Tokunaga et al.'s protocol [Phys. Rev. A 71 (2005) 012314]. The sender distributes the classical secret shares to his or her n agents and each agent owns a secret share in advance. The sender's secure direct communication message can be extracted by an agent subset by collaboration in such a way that at least t or more agents can obtain the secret message with the mutual assistances but any t-1 or fewer agents cannot. In contrast to the previous multiparty quantum secret sharing protocols in which the sender's secret message can be recovered only if all the agents collaborate, our protocol is more practical and more flexible
Abstract：We propose a (t,n)-threshold quantum secret sharing protocol of secure direct communication following some ideas of Zhang's protocol [Phys. Lett. A 342 (2005) 60] and Tokunaga et al.'s protocol [Phys. Rev. A 71 (2005) 012314]. The sender distributes the classical secret shares to his or her n agents and each agent owns a secret share in advance. The sender's secure direct communication message can be extracted by an agent subset by collaboration in such a way that at least t or more agents can obtain the secret message with the mutual assistances but any t-1 or fewer agents cannot. In contrast to the previous multiparty quantum secret sharing protocols in which the sender's secret message can be recovered only if all the agents collaborate, our protocol is more practical and more flexible
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2009, Vol. 26 
