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Paper Abstract and Keywords
Presentation 2024-08-07 10:30
Revisiting the Lossy Signature Scheme Based on DSDL Problem
Tihang Wijaya, Bagus Santoso (UEC) IT2024-20
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we revisit the lossy signature scheme based on Decisional Short Discrete Logarithm (DSDL) problem proposed by Abdalla et al. We show that we can make the security proof tighter by minimal modifications on the scheme and by introducing a generalization of DSDL problem which we called textit{Decisional Bounded Discrete Logarithm (DBDL) problem} as the foundation of the security proof. By assuming that the DBDL problem has the same hardness as the DSDL problem, we show that we can decrease the size of the group order of the public key considerably, i.e., $112$ bits decrease in $80$ bit security and $252$ bits decrease in $128$ bit security.
Keyword (in Japanese) (See Japanese page) 
(in English) Identification scheme / lossy signature scheme / security parameters / / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 147, IT2024-20, pp. 36-41, Aug. 2024.
Paper # IT2024-20 
Date of Issue 2024-07-30 (IT) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
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)
Download PDF IT2024-20

Conference Information
Committee IT  
Conference Date 2024-08-06 - 2024-08-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Okayama University, Tsushima campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Freshman session, General 
Paper Information
Registration To IT 
Conference Code 2024-08-IT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Revisiting the Lossy Signature Scheme Based on DSDL Problem 
Sub Title (in English)  
Keyword(1) Identification scheme  
Keyword(2) lossy signature scheme  
Keyword(3) security parameters  
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1st Author's Name Tihang Wijaya  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Bagus Santoso  
2nd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2024-08-07 10:30:00 
Presentation Time 25 minutes 
Registration for IT 
Paper # IT2024-20 
Volume (vol) vol.124 
Number (no) no.147 
Page pp.36-41 
#Pages 6 
Date of Issue 2024-07-30 (IT) 

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