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Paper Abstract and Keywords
Presentation 2013-11-29 13:05
A Lossy Identification Scheme from the Subgroup Decision
Shingo Hasegawa, Shuji Isobe (Tohoku Univ.) ISEC2013-68 LOIS2013-34
Abstract (in Japanese) (See Japanese page) 
(in English) Lossy identification schemes are used to construct tightly secure signature schemes via the Fiat-Shamir heuristic in the random oracle model.
Several lossy identification schemes are instantiated by using many cryptographic assumptions, respectively.
In this paper, we propose new instantiations of lossy identification schemes.
We first construct a variant of the Schnorr's identification scheme,
and show its lossiness under
a slight variant of the subgroup decision assumption,
what we call the generalized subgroup decision assumption.
We also construct another lossy identification scheme which is based on the DCR assumption.
Our DCR-based scheme has an advantage relative to the known DCR-based scheme
since our scheme needs no modular exponentiation in the response phase.
Keyword (in Japanese) (See Japanese page) 
(in English) lossy identification schemes / Fiat-Shamir heuristic / subgroup decision assumption / / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 326, ISEC2013-68, pp. 57-63, Nov. 2013.
Paper # ISEC2013-68 
Date of Issue 2013-11-21 (ISEC, LOIS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee ISEC LOIS  
Conference Date 2013-11-28 - 2013-11-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2013-11-ISEC-LOIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Lossy Identification Scheme from the Subgroup Decision 
Sub Title (in English)  
Keyword(1) lossy identification schemes  
Keyword(2) Fiat-Shamir heuristic  
Keyword(3) subgroup decision assumption  
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1st Author's Name Shingo Hasegawa  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Shuji Isobe  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2013-11-29 13:05:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2013-68, LOIS2013-34 
Volume (vol) vol.113 
Number (no) no.326(ISEC), no.327(LOIS) 
Page pp.57-63 
#Pages
Date of Issue 2013-11-21 (ISEC, LOIS) 


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