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Paper Abstract and Keywords
Presentation 2007-11-22 11:10
Cryptanalysis experiment of OTU2000 using the Lagarias-Odlyzko method
Naoto Yamaguchi, Akira Hayashi (KIT) ISEC2007-102 OIS2007-74
Abstract (in Japanese) (See Japanese page) 
(in English) Okamoto-Tanaka-Uchiyama proposed a public key cryptosystem in 2000, which we call OTU2000 in this paper. OTU2000 is a knapsack cryptosystem that is claimed to be secure even under the quantumn computation environment. We have done computer experiments to investigate how secure OTU2000 is. The method of attack is of the Lagarias-Odlyzko type, where four different lattice bases are used and the two basis reduction algorithms, LLL and BKZ, are applied.The results show that the success rate of attack is nonzero even in the case of relatively high dimension.
Keyword (in Japanese) (See Japanese page) 
(in English) public key cryptosystem / knapsack cryptosystem / lattice basis reduction / Lagarias-Odlyzko attack / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 346, ISEC2007-102, pp. 23-26, Nov. 2007.
Paper # ISEC2007-102 
Date of Issue 2007-11-15 (ISEC, OIS) 
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 ISEC2007-102 OIS2007-74

Conference Information
Committee ISEC LOIS  
Conference Date 2007-11-21 - 2007-11-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Kobe University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2007-11-ISEC-OIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Cryptanalysis experiment of OTU2000 using the Lagarias-Odlyzko method 
Sub Title (in English)  
Keyword(1) public key cryptosystem  
Keyword(2) knapsack cryptosystem  
Keyword(3) lattice basis reduction  
Keyword(4) Lagarias-Odlyzko attack  
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Keyword(8)  
1st Author's Name Naoto Yamaguchi  
1st Author's Affiliation Kanazawa Institute of Technology (KIT)
2nd Author's Name Akira Hayashi  
2nd Author's Affiliation Kanazawa Institute of Technology (KIT)
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Speaker Author-1 
Date Time 2007-11-22 11:10:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2007-102, OIS2007-74 
Volume (vol) vol.107 
Number (no) no.346(ISEC), no.348(OIS) 
Page pp.23-26 
#Pages 4 
Date of Issue 2007-11-15 (ISEC, OIS) 

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