Takeshi KAWABATA


Finding Higher Order Differentials of MISTY1
Yukiyasu TSUNOO Teruo SAITO Takeshi KAWABATA Hirokatsu NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/06/01
Vol. E95-A  No. 6  pp. 1049-1055
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
block cipherCRYPTREChigher order differential attackMISTY1NESSIE
 Summary | Full Text:PDF(519.3KB)

Access-Driven Cache Attack on the Stream Cipher DICING Using the Chosen IV
Yukiyasu TSUNOO Takeshi KAWABATA Tomoyasu SUZAKI Hiroyasu KUBO Teruo SAITO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/04/01
Vol. E93-A  No. 4  pp. 799-807
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
eSTREAMstream cipherDICINGcache attacks
 Summary | Full Text:PDF(338.6KB)

Security Analysis of 7-Round MISTY1 against Higher Order Differential Attacks
Yukiyasu TSUNOO Teruo SAITO Maki SHIGERI Takeshi KAWABATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/01/01
Vol. E93-A  No. 1  pp. 144-152
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Cryptanalysis
Keyword: 
block cipherCRYPTREChigher order differential attackMISTY1NESSIE
 Summary | Full Text:PDF(322.6KB)

Results of Linear Cryptanalysis Using Linear Sieve Methods
Yukiyasu TSUNOO Hiroki NAKASHIMA Hiroyasu KUBO Teruo SAITO Takeshi KAWABATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/05/01
Vol. E92-A  No. 5  pp. 1347-1355
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
block cipherlinear cryptanalysislinear sieve method
 Summary | Full Text:PDF(355KB)

A Study on Higher Order Differential Attack of Camellia
Takeshi KAWABATA Masaki TAKEDA Toshinobu KANEKO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/01/01
Vol. E86-A  No. 1  pp. 31-36
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Ciphers and Hash Functions
Keyword: 
block cipherchosen plaintext attackhigher order differential attackCamellia
 Summary | Full Text:PDF(535.6KB)

Japanese Phonetic Typewriter Using HMM Phone Recognition and Stochastic Phone-Sequence Modeling
Takeshi KAWABATA Toshiyuki HANAZAWA Katsunobu ITOH Kiyohiro SHIKANO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/07/25
Vol. E74-A  No. 7  pp. 1783-1787
Type of Manuscript:  Special Section PAPER (Special Issue on Continuous Speech Recognition and Understanding)
Category: Dictation Systems
Keyword: 
 Summary | Full Text:PDF(433.7KB)