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Paper Abstract and Keywords
Presentation 2016-03-10 15:55
Fundamental Properties on a Secret-key Cryptosystem with Guessing Secrecy for Plaintexts and Keys
Shota Kamiya, Hiroki Koga (Tsukuba Unv.) IT2015-123 ISEC2015-82 WBS2015-106
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper we consider a secret-key cryptosystem with a wiretapper who tries to guess the plaintext corresponding to a transmitted cryptogram. First, we point out the possibility such that a wiretapper can easily guess a plaintext by guessing a key even if a secret-key cryptosystem satisfies the existing guessing secrecy criterion for the plaintext. In this paper we introduce a new guessing secrecy criterion for the key and clarify fundamental properties satisfying the new criterion. In addition, we extend the guessing secrecy criterion for the plaintext to a stronger criterion, i.e., the guessing secrecy criterion for any partial information of the plaintext. It is shown that we can construct a secret-key cryptosystem satisfying the stronger criterion if the key is uniformly distributed.
Keyword (in Japanese) (See Japanese page) 
(in English) Information-theoristic secrecy / Shannon’s cipher system / guessing secrecy / min-entropy / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 500, IT2015-123, pp. 137-142, March 2016.
Paper # IT2015-123 
Date of Issue 2016-03-03 (IT, ISEC, WBS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 IT2015-123 ISEC2015-82 WBS2015-106

Conference Information
Committee IT ISEC WBS  
Conference Date 2016-03-10 - 2016-03-11 
Place (in Japanese) (See Japanese page) 
Place (in English) The University of Electro-Communications 
Topics (in Japanese) (See Japanese page) 
Topics (in English) joint meeting of IT, ISEC, and WBS 
Paper Information
Registration To IT 
Conference Code 2016-03-IT-ISEC-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fundamental Properties on a Secret-key Cryptosystem with Guessing Secrecy for Plaintexts and Keys 
Sub Title (in English)  
Keyword(1) Information-theoristic secrecy  
Keyword(2) Shannon’s cipher system  
Keyword(3) guessing secrecy  
Keyword(4) min-entropy  
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1st Author's Name Shota Kamiya  
1st Author's Affiliation University of Tsukuba (Tsukuba Unv.)
2nd Author's Name Hiroki Koga  
2nd Author's Affiliation University of Tsukuba (Tsukuba Unv.)
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Date Time 2016-03-10 15:55:00 
Presentation Time 25 minutes 
Registration for IT 
Paper # IT2015-123, ISEC2015-82, WBS2015-106 
Volume (vol) vol.115 
Number (no) no.500(IT), no.501(ISEC), no.502(WBS) 
Page pp.137-142 
#Pages
Date of Issue 2016-03-03 (IT, ISEC, WBS) 


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