Youichi TAKASHIMA


Number of Detectable Gradations in X-Ray Photographs of Cavities Inside 3-D Printed Objects
Masahiro SUZUKI Piyarat SILAPASUPHAKORNWONG Youichi TAKASHIMA Hideyuki TORII Kazutake UEHIRA 
Publication:   
Publication Date: 2017/06/01
Vol. E100-D  No. 6  pp. 1364-1367
Type of Manuscript:  LETTER
Category: Information Network
Keyword: 
digital fabrication3-D printing3-D printercopyright protectiondigital watermarking
 Summary | Full Text:PDF(773KB)

E2--A New 128-Bit Block Cipher
Masayuki KANDA Shiho MORIAI Kazumaro AOKI Hiroki UEDA Youichi TAKASHIMA Kazuo OHTA Tsutomu MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/25
Vol. E83-A  No. 1  pp. 48-59
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
encryption algorithmblock cipherE2AESdesign strategy
 Summary | Full Text:PDF(1.3MB)

Digital Watermarking Technique for Motion Pictures Based on Quantization
Hiroshi OGAWA Takao NAKAMURA Atsuki TOMIOKA Youichi TAKASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/25
Vol. E83-A  No. 1  pp. 77-89
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
motion picture watermarkingadaptive quantizationreliabilitysoft decisionMPEG
 Summary | Full Text:PDF(1.3MB)

Improved Digital Watermark Robustness against Translation and/or Cropping of an Image Area
Takao NAKAMURA Hiroshi OGAWA Atsuki TOMIOKA Youichi TAKASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/25
Vol. E83-A  No. 1  pp. 68-76
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
digital watermarkimage processingorthogonal transformspread spectrumcopyright protection
 Summary | Full Text:PDF(2.8MB)

A Prototype KPS and Its Application--IC Card Based Key Sharing and Cryptographic Communication--
Tsutomu MATSUMOTO Youichi TAKASHIMA Hideki IMAI Minoru SASAKI Hiroharu YOSHIKAWA Shin-ichiro WATANABE 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/07/25
Vol. E73-E  No. 7  pp. 1111-1119
Type of Manuscript:  Special Section PAPER (Special Issue on Cryptography and Information Security)
Category: Applications
Keyword: 
 Summary | Full Text:PDF(769.1KB)

On Seeking Smart Public-Key-Distribution Systems
Tsutomu MATSUMOTO Youichi TAKASHIMA Hideki IMAI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/02/25
Vol. E69-E  No. 2  pp. 99-106
Type of Manuscript:  PAPER
Category: Information and Communication Theory
Keyword: 
 Summary | Full Text:PDF(504.5KB)