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Paper Abstract and Keywords
Presentation 2018-05-17 16:25
Public key attack on knapsak PKC based on subset sum decision problem
Ryuichi Sakai, Yasuyuki Murakami (Osaka Electro-Communication Univ.) IT2018-6 EMM2018-6
Abstract (in Japanese) (See Japanese page) 
(in English) In 2012, Murakami, Hamasho and Kasahara have proposed a knapsack PKC based on the subset sum decision problem. An attack against these type of knapsack PKCs by computing alternative solutions of the knapsack problem is then proposed by Nagao and Morii. In 2016, one of the authors, Murakami, have also proposed the knapsack type PKC (M16 PKC) based on the subset sum decision problem for preventing Nagao and Morii attack.
In this paper, we propose the new effective attacks against M16 knapsack PKC. The proposed attacks are able to compute equivalent secret key from the public key, and decode the cipher text of M16 PKC with the equivalent secret key, in a same way of the decryption with the legitimate ecret(decryption) keys.
Keyword (in Japanese) (See Japanese page) 
(in English) knapsack PKC / subset sum decision problem / public key attack / equivalent secret key attack / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 31, IT2018-6, pp. 31-34, May 2018.
Paper # IT2018-6 
Date of Issue 2018-05-10 (IT, 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)
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Conference Information
Committee IT EMM  
Conference Date 2018-05-17 - 2018-05-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Ookayama Campus, Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Information Security, Information Theory, Information Hiding, etc. 
Paper Information
Registration To IT 
Conference Code 2018-05-IT-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Public key attack on knapsak PKC based on subset sum decision problem 
Sub Title (in English)  
Keyword(1) knapsack PKC  
Keyword(2) subset sum decision problem  
Keyword(3) public key attack  
Keyword(4) equivalent secret key attack  
1st Author's Name Ryuichi Sakai  
1st Author's Affiliation Osaka Electro-Communication University (Osaka Electro-Communication Univ.)
2nd Author's Name Yasuyuki Murakami  
2nd Author's Affiliation Osaka Electro-Communication University (Osaka Electro-Communication Univ.)
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Date Time 2018-05-17 16:25:00 
Presentation Time 25 
Registration for IT 
Paper # IEICE-IT2018-6,IEICE-EMM2018-6 
Volume (vol) IEICE-118 
Number (no) no.31(IT), no.32(EMM) 
Page pp.31-34 
#Pages IEICE-4 
Date of Issue IEICE-IT-2018-05-10,IEICE-EMM-2018-05-10 

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