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《Journal of South China University of Technology(Natural Science Edition)》 2007-01
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Verifiable(t,n) Threshold Secret-Sharing Scheme and Its Security

Pang Liao-jun~1 Li Hui-xian~2 Wang Yu-min~1(1.State Key Laboratory of Integrated Service Networks,Xidian Univ.,Xi'an 710071,Shaanxi,China;2.School of Computer Science and Engineering,Northwestern Polytechnical Univ., Xi'an 710072,Shaanxi,China)  
In order to share a secret among a group of participants without a trusted center and to prevent the parti-cipants from cheating each other,a dynamic and verifiable(t,n) threshold secret-sharing scheme is proposed.In this scheme,the secret shadow of each participant is negotiated by all participants,and the secret dealer does not have to distribute any secret shadow.So,in the process of secret distribution,the dealer is only asked to compute some public values without sending any information to each participant. Furthermore,in the process of secret reco-very,each participant of a cooperative only submits a pseudo-shadow computed via the secret shadow to the secret computer,and anyone is allowed to check the validity of the pseudo-shadow.The security of the proposed scheme can be effectively guaranteed due to the difficulty in solving the discrete logarithm problem.
【Fund】: 国家“973”计划项目(G1999035805);; 国家自然科学基金资助项目(50479055)
【CateGory Index】: TN918.1
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7 ZENG Gui-hua 1,MA Wen-ping 2,WANG Xin-mei 2,ZHU Hong-wen 1( Electrical engineer department of Shanghai Jiaotong university,Shanghai 20003 0,China; National Key lab.on ISN,Xidian university,Xi'an,Shanxi 710071,China);Signature Scheme Based on Quantum Cryptography[J];Acta Electronica Sinica;2001-08
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