Takashi KITAGAWA


Smallest Size of Circulant Matrix for Regular (3, L) and (4, L) Quasi-Cyclic LDPC Codes with Girth 6
Manabu HAGIWARA Marc P.C. FOSSORIER Takashi KITAGAWA Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/11/01
Vol. E92-A  No. 11  pp. 2891-2894
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
LDPC codesdifference matrixquasi-cyclic codesregular LDPC codescirculant matrixlower bounds
 Summary | Full Text:PDF(84.2KB)

An Efficient 2-Secure and Short Random Fingerprint Code and Its Security Evaluation
Koji NUIDA Satoshi FUJITSU Manabu HAGIWARA Hideki IMAI Takashi KITAGAWA Kazuto OGAWA Hajime WATANABE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/01/01
Vol. E92-A  No. 1  pp. 197-206
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
fingerprintc-secure codecollusion attacksecurity analysiswatermarkDRM
 Summary | Full Text:PDF(528.7KB)

A Random-Error-Resilient Collusion-Secure Fingerprinting Code, Randomized c-Secure CRT Code
Hajime WATANABE Takashi KITAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/10/01
Vol. E86-A  No. 10  pp. 2589-2595
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Information Security
Keyword: 
illegal copyfingerprintingwatermarkingcollusion attackc-Secure CRT Code
 Summary | Full Text:PDF(297.4KB)