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Paper Abstract and Keywords
Presentation 2015-07-02 11:05
Chosen Initial Vector Attack against Pseudorandom Number Generator QP-DYN
Kenichi Arai, Yasutaka Igarashi, Toshinobu Kaneko (Tokyo Univ of Science) ISEC2015-11 SITE2015-9 ICSS2015-21 EMM2015-19
Abstract (in Japanese) (See Japanese page) 
(in English) QP--DYN is a new pseudorandom number generator (PRNG) proposed by Ohya and Accardi.
In 2014, Iriyama and Ohya introduced the QP--DYN algorithm and some results of statistical tests,
and discussed on its application for stream cipher.
However, they are not evaluating its security.
In this paper, we evaluate its security against chosen initial vector attack.
As a result, we show that QP--DYN is not secure cryptologically, and
show that the 128--bit secret key can be derived by using $10$ initial vectors.
Keyword (in Japanese) (See Japanese page) 
(in English) pseudorandom number generator / QP-DYN / stream cipher / chosen initial vector attack / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 119, ISEC2015-11, pp. 15-21, July 2015.
Paper # ISEC2015-11 
Date of Issue 2015-06-25 (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 ISEC2015-11 SITE2015-9 ICSS2015-21 EMM2015-19

Conference Information
Conference Date 2015-07-02 - 2015-07-03 
Place (in Japanese) (See Japanese page) 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2015-07-CSEC-ISEC-SITE-ICSS-EMM-SPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Chosen Initial Vector Attack against Pseudorandom Number Generator QP-DYN 
Sub Title (in English)  
Keyword(1) pseudorandom number generator  
Keyword(2) QP-DYN  
Keyword(3) stream cipher  
Keyword(4) chosen initial vector attack  
1st Author's Name Kenichi Arai  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ of Science)
2nd Author's Name Yasutaka Igarashi  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ of Science)
3rd Author's Name Toshinobu Kaneko  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ of Science)
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Date Time 2015-07-02 11:05:00 
Presentation Time 25 
Registration for ISEC 
Paper # IEICE-ISEC2015-11,IEICE-SITE2015-9,IEICE-ICSS2015-21,IEICE-EMM2015-19 
Volume (vol) IEICE-115 
Number (no) no.119(ISEC), no.120(SITE), no.121(ICSS), no.122(EMM) 
Page pp.15-21 
#Pages IEICE-7 
Date of Issue IEICE-ISEC-2015-06-25,IEICE-SITE-2015-06-25,IEICE-ICSS-2015-06-25,IEICE-EMM-2015-06-25 

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