| ID-Based Threshold Decryption Secure Against Chosen Plaintext Attack |
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| 作者姓名： | 龙宇 陈克非 刘胜利 |
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| 作者单位： | Dept. of Computer Science and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China，National Lab.of Modern Communications Chengdu 610041，Dept. of Computer Science and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China，National Lab.of Modern Communications Chengdu 610041，Dept. of Computer Science and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China |
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| 基金项目： | NationalNaturalScienceFoundationofChina(Nos.60303026,60573030,90104005and60303026)andtheFoundationofNLMC(No.51436040405JW0304) |
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| 摘 要： | Introduction Inthresholddecryptioncryptosystems,the powertodecryptissharedamongasetofdecryp-tionservers.In2001,D.BonehandM.Franklin proposedapracticalidentity-basedencryption(IBE)schemefromtheweilpairing.Combining thetwoconceptstogether,some“ID-basedthresh-olddecryption”schemeshavebeenconstructed.In suchschemes,anentity'spublickeyisderiveddi-rectlyfromitsidentity.Atrustedthirdparty calledtheprivatekeygenerator(PKG)usesthe masterkeytogenerateprivatekeysforallentities.Eachdecryptionserve…
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| 关 键 词： | ID号 解密方法 循环方式 密码术 |
| 文章编号： | 1007-1172（2006）02-0127-07 |
| 收稿时间： | 2005-10-10 |
ID-Based Threshold Decryption Secure Against Chosen Plaintext Attack |
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| LONG Yu,CHEN Ke-fei,LIU Sheng-li.ID-Based Threshold Decryption Secure Against Chosen Plaintext Attack[J].Journal of Shanghai Jiaotong university,2006,11(2):127-133. |
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| Authors: | LONG Yu CHEN Ke-fei LIU Sheng-li |
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| Abstract: | B.Libert and J.Quisquater proposed an identity(ID)-based threshold decryption scheme. This paper found flaw in their security reduction and presented two methods to prove this scheme is resist against chosen-plaintext attack(CPA), based on the weaker model of security known as selective ID-based threshold CPA and the common model known as ID-based threshold CPA respectively. |
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| Keywords: | threshold decryption identity-based cryptology publicly checkable encryption |
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