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Paper Abstract and Keywords
Presentation 2014-07-04 10:40
Cryptanalysis of a matrix variant of NTRU
Takanori Yasuda (ISIT), Yuya Yamaguchi (Kyushu Univ.), Xavier Dahan, Kouichi Sakurai (ISIT) ISEC2014-33 SITE2014-28 ICSS2014-37 EMM2014-33
Abstract (in Japanese) (See Japanese page) 
(in English) Since its introduction in 1996, the cryptosystem NTRU has become a well-established candidate for the next generation public-key cryptography.
Several generalizations, or variations of NTRU have been proposed
mainly consisting in changing the ring of truncated polynomials whereby encryption/decryption are done. Considering for example the ring of matrices have appealing features, since the non-commutativity can complicate further the task of recovering a ciphertext.
We consider in this paper the cryptanalysis of ``matrixNTRU'',
a natural matrix variant proposed a few years ago.
A major weakness is indeed that the lattice underlying the system is
significantly smaller than expected. We finally propose a modification that prevents this weakness.
Keyword (in Japanese) (See Japanese page) 
(in English) Public-key cryptography / Lattice-based cryptography / Post-quantum cryptography / NTRU / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 115, ISEC2014-33, pp. 239-246, July 2014.
Paper # ISEC2014-33 
Date of Issue 2014-06-26 (ISEC, SITE, ICSS, EMM) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 ISEC2014-33 SITE2014-28 ICSS2014-37 EMM2014-33

Conference Information
Conference Date 2014-07-03 - 2014-07-04 
Place (in Japanese) (See Japanese page) 
Place (in English) San-Refure Hakodate 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Security 
Paper Information
Registration To ISEC 
Conference Code 2014-07-ICSS-ISEC-SITE-EMM-CSEC-SPT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Cryptanalysis of a matrix variant of NTRU 
Sub Title (in English)  
Keyword(1) Public-key cryptography  
Keyword(2) Lattice-based cryptography  
Keyword(3) Post-quantum cryptography  
Keyword(4) NTRU  
1st Author's Name Takanori Yasuda  
1st Author's Affiliation Institute of Systems, Information Technologies and Nanotechnologies (ISIT)
2nd Author's Name Yuya Yamaguchi  
2nd Author's Affiliation Kyushu Universicty (Kyushu Univ.)
3rd Author's Name Xavier Dahan  
3rd Author's Affiliation Institute of Systems, Information Technologies and Nanotechnologies (ISIT)
4th Author's Name Kouichi Sakurai  
4th Author's Affiliation Institute of Systems, Information Technologies and Nanotechnologies (ISIT)
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Date Time 2014-07-04 10:40:00 
Presentation Time 25 
Registration for ISEC 
Paper # IEICE-ISEC2014-33,IEICE-SITE2014-28,IEICE-ICSS2014-37,IEICE-EMM2014-33 
Volume (vol) IEICE-114 
Number (no) no.115(ISEC), no.116(SITE), no.117(ICSS), no.118(EMM) 
Page pp.239-246 
#Pages IEICE-8 
Date of Issue IEICE-ISEC-2014-06-26,IEICE-SITE-2014-06-26,IEICE-ICSS-2014-06-26,IEICE-EMM-2014-06-26 

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