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Paper Abstract and Keywords
Presentation 2015-05-15 16:35
[Invited Talk] Black-Box Separations for One-More (Static) Problems and Its Generalization
Jiang Zhang, Zhenfeng Zhang, Yu Chen, Yanfei Guo (CAS), Zongyang Zhang (AIST)
Abstract (in Japanese) (See Japanese page) 
(in English) We will present our ASIACRYPT 2014 paper about the hardness of one-more problems. As previous works only deal with one-more problems whose solution can be efficiently checked, the relation between the hardness of the one-more (static) CDH problem over non-bilinear groups and other hard problems is still unclear. In this work, we give the first impossibility results showing that black-box reductions cannot be used to base the hardness of the one-more (static) CDH problem (over groups where the DDH problem is still hard) on any standard hardness assumption. Furthermore, we also extend the impossibility results to a class of generalized “one-more” problems, which not only subsume/strengthen many existing separations for traditional one-more problems, but also give new separations for many other interesting “one-more” problems.
Keyword (in Japanese) (See Japanese page) 
(in English) Black-box separation / meta-reduction / trapdoor test / one-more (static) CDH problem / generalized ``one-more'' problem / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 28, ISEC2015-7, pp. 41-41, May 2015.
Paper # ISEC2015-7 
Date of Issue 2015-05-08 (ISEC) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee ISEC  
Conference Date 2015-05-15 - 2015-05-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2015-05-ISEC 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Black-Box Separations for One-More (Static) Problems and Its Generalization 
Sub Title (in English)  
Keyword(1) Black-box separation  
Keyword(2) meta-reduction  
Keyword(3) trapdoor test  
Keyword(4) one-more (static) CDH problem  
Keyword(5) generalized ``one-more'' problem  
1st Author's Name Jiang Zhang  
1st Author's Affiliation Chinese Academy of Sciences (CAS)
2nd Author's Name Zhenfeng Zhang  
2nd Author's Affiliation Chinese Academy of Sciences (CAS)
3rd Author's Name Yu Chen  
3rd Author's Affiliation Chinese Academy of Sciences (CAS)
4th Author's Name Yanfei Guo  
4th Author's Affiliation Chinese Academy of Sciences (CAS)
5th Author's Name Zongyang Zhang  
5th Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
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Date Time 2015-05-15 16:35:00 
Presentation Time 30 
Registration for ISEC 
Paper # IEICE-ISEC2015-7 
Volume (vol) IEICE-115 
Number (no) no.28 
Page p.41 
#Pages IEICE-1 
Date of Issue IEICE-ISEC-2015-05-08 

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