Robust Multiparty Quantum Secret Sharing against Participant Forcible Manipulation  

作　　者：孙莹 温巧燕 朱甫臣 

机构地区：[1]State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications [2]National Laboratory for Modern Communications

出　　处：《Communications in Theoretical Physics》2010年第7期89-92,共4页理论物理通讯（英文版）

基　　金：Supported by National Natural Science Foundation of China under Grant Nos.60873191,60903152,60821001;Specialized Research Fund for the Doctoral Program of High Education under Grant Nos.200800131016 and 20090005110010;Beijing Nova Program under Grant No.2008B51;Key Project of Chinese Ministry of Education under Grant No.109014;Beijing Natural Science Foundation under Grant Nos.4072020 and 4102055

摘　　要：The security of the multiparty quantum secret sharing protocol proposed by Gao [G.Gao,Commun.Theor.Phys.52 (2009) 421] is analyzed.It is shown that this protocol is vulnerable since the agents' imperfectencryption scheme can be attacked by a powerful participant.We introduce a attack strategy called participant forciblemanipulation and analyze the information leakage in this protocol under this attack.At last,we give an improved versionof the original protocol.The improved protocol is robust and has the same efficiency as the original one.

关 键 词：two-level systems quantum secret sharing quantum information 

分 类 号：O413.1[理学—理论物理] TN918.1[理学—物理]