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Paper Abstract and Keywords
Presentation 2017-12-22 10:15
Optimizing Bleichenbacher's Attack on Schnorr-Type Signatures with Barely Biased Nonces
Akira Takahashi (Kyoto Univ.), Mehdi Tibouchi, Masayuki Abe, Tatsuaki Okamoto (NTT) ISEC2017-84 COMP2017-38
Abstract (in Japanese) (See Japanese page) 
(in English) Bleichenbacher's attack is a key recovery attack technique exploiting biased nonces in Schnorr-type signatures.
While attacking very small biases was thought to be out of reach in
previous work due to high memory consumption,
we tackle the problem using the Schroeppel--Shamir algorithm, which
allows us to trade space complexity for time complexity.
We provide a concrete estimate of the time-memory trade-off obtained with
that approach and demonstrate that it makes the attack achievable in
practice against groups of larger order and smaller nonce biases than
previously thought tractable.
Keyword (in Japanese) (See Japanese page) 
(in English) Schnorr-type signature / Nonce bias / Bleichenbacher’s attack / / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 369, ISEC2017-84, pp. 83-88, Dec. 2017.
Paper # ISEC2017-84 
Date of Issue 2017-12-14 (ISEC, COMP) 
ISSN Print edition: ISSN 0913-5685    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 ISEC2017-84 COMP2017-38

Conference Information
Committee ISEC COMP  
Conference Date 2017-12-21 - 2017-12-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Eikokuji Campus, Kochi University of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2017-12-ISEC-COMP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimizing Bleichenbacher's Attack on Schnorr-Type Signatures with Barely Biased Nonces 
Sub Title (in English)  
Keyword(1) Schnorr-type signature  
Keyword(2) Nonce bias  
Keyword(3) Bleichenbacher’s attack  
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1st Author's Name Akira Takahashi  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Mehdi Tibouchi  
2nd Author's Affiliation NTT Secure Platform Laboratories (NTT)
3rd Author's Name Masayuki Abe  
3rd Author's Affiliation NTT Secure Platform Laboratories (NTT)
4th Author's Name Tatsuaki Okamoto  
4th Author's Affiliation NTT Secure Platform Laboratories (NTT)
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Speaker Author-1 
Date Time 2017-12-22 10:15:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2017-84, COMP2017-38 
Volume (vol) vol.117 
Number (no) no.369(ISEC), no.370(COMP) 
Page pp.83-88 
#Pages 6 
Date of Issue 2017-12-14 (ISEC, COMP) 

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