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Democratic Group Signatures with Threshold Traceability

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【作者】 李祥学； 钱海峰； 李建华；

【Author】 LI Xiang-xue~(1,3,4*) QIAN Hai-feng~2 LI Jian-hua~1 (1.School of Information Security Engineering,Shanghai Jiaotong University,Shanghai 200240,China; 2.Computer Science and Technology Department,East China Normal University,Shanghai 200241,China; 3.State Key Lab of Information Security,Graduate School of Chinese Academy of Sciences,Beijing 100039,China; 4.State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China)

【机构】 School of Information Security Engineering,Shanghai Jiaotong University,Shanghai 200240,China； State Key Lab of Information Security,Graduate School of Chinese Academy of Sciences,Beijing 100039,China； State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China； Computer Science and Technology Department,East China Normal University,Shanghai 200241,China；

【摘要】 <正>This paper presents a concrete democratic group signatme scheme which holds(t,n)-threshold trace- ability.In the scheme,the capability of tracing the actual signer is distributed among n group members.It gives a valid democratic group signature such that any subset with more than t members can jointly reconstruct a secret and reveal the identity of the signer.Any active adversary cannot do this even if he can corrupt up to t-1 group members.

【Abstract】 This paper presents a concrete democratic group signatme scheme which holds(t,n)-threshold trace- ability.In the scheme,the capability of tracing the actual signer is distributed among n group members.It gives a valid democratic group signature such that any subset with more than t members can jointly reconstruct a secret and reveal the identity of the signer.Any active adversary cannot do this even if he can corrupt up to t-1 group members.

【关键词】 democratic group signature(DGS)； anonymity； traceability； threshold traceability；
【Key words】 democratic group signature(DGS)； anonymity； traceability； threshold traceability；
【基金】 the National Natural Science Foundation of China(Nos.60703031,60703004,60673076,60672068)
  • 【文献出处】 Journal of Shanghai Jiaotong University(Science) ,上海交通大学学报(英文版) , 编辑部邮箱 ,2009年01期
  • 【分类号】TP309
  • 【被引频次】1
  • 【下载频次】62
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