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Paper Abstract and Keywords
Presentation 2005-03-18 15:30
The coding theorem for the Shannon cipher system with a guessing wiretapper and correlated sources
Yutaka Hayashi, Hirosuke Yamamoto (Univ. of Tokyo)
Abstract (in Japanese) (See Japanese page) 
(in English) The security of Shannon's cipher system is traditionally measured in terms of the equivocation$\frac{1}{n}H(Y|Z)$, where
$Y$ is a secert plaintext and $Z$ is its cryptogram that a wiretapper can obtain. But, Merhav and Arikan have considered the coding problem
in another security criterion, which is measured by the expected number of guesses that the wiretapper has to submit before the success. On the other hand,
in the traditional security criterion, Yamamoto has treated the coding problem with the correlated source outputs $X$ and $Y$
such that $X$ is a secret information against wiretappsers and $Y$ is a nonsecret information transmitted to a legitimate receiver.
In this paper, we extend these two results and prove the coding theorem of Yamamoto's cipher system
in Merhav-Arikan's security criterion.
Keyword (in Japanese) (See Japanese page) 
(in English) guessing wiretapper / Shannon's cipher system / correlated sources / / / / /  
Reference Info. IEICE Tech. Rep., vol. 104, no. 730, IT2004-86, pp. 83-88, March 2005.
Paper # IT2004-86 
Date of Issue 2005-03-10 (IT, ISEC, WBS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee IT WBS ISEC  
Conference Date 2005-03-17 - 2005-03-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) general 
Paper Information
Registration To IT 
Conference Code 2005-03-IT-WBS-ISEC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The coding theorem for the Shannon cipher system with a guessing wiretapper and correlated sources 
Sub Title (in English)  
Keyword(1) guessing wiretapper  
Keyword(2) Shannon's cipher system  
Keyword(3) correlated sources  
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1st Author's Name Yutaka Hayashi  
1st Author's Affiliation University of Tokyo (Univ. of Tokyo)
2nd Author's Name Hirosuke Yamamoto  
2nd Author's Affiliation University of Tokyo (Univ. of Tokyo)
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Speaker Author-1 
Date Time 2005-03-18 15:30:00 
Presentation Time 25 minutes 
Registration for IT 
Paper # IT2004-86, ISEC2004-142, WBS2004-201 
Volume (vol) vol.104 
Number (no) no.730(IT), no.732(ISEC), no.734(WBS) 
Page pp.83-88 
#Pages
Date of Issue 2005-03-10 (IT, ISEC, WBS) 


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