Toshihiro OHIGASHI


Theoretical Understanding of Some Conditional and Joint Biases in RC4 Stream Cipher
Sonu JHA Subhadeep BANIK Takanori ISOBE Toshihiro OHIGASHI Santanu SARKAR 
Publication:   
Publication Date: 2018/11/01
Vol. E101-A  No. 11  pp. 1869-1879
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
RC4triple-byte biasesconditional biasesdistinguishing attacks3-predictive-3-states
 Summary | Full Text:PDF(1.3MB)

How to Efficiently Exploit Different Types of Biases for Plaintext Recovery of RC4
Yuhei WATANABE Takanori ISOBE Toshihiro OHIGASHI Masakatu MORII 
Publication:   
Publication Date: 2017/03/01
Vol. E100-A  No. 3  pp. 803-810
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
RC4SSL/TLSplaintext recovery attackkeystream biases
 Summary | Full Text:PDF(937.9KB)

Full Plaintext Recovery Attacks on RC4 Using Multiple Biases
Toshihiro OHIGASHI Takanori ISOBE Yuhei WATANABE Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/01/01
Vol. E98-A  No. 1  pp. 81-91
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Key Based Cryptography
Keyword: 
RC4stream cipherkeystream biasesplaintext recovery attackguess-and-determine attackbroadcast setting
 Summary | Full Text:PDF(945KB)

Comprehensive Analysis of Initial Keystream Biases of RC4
Takanori ISOBE Toshihiro OHIGASHI Yuhei WATANABE Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/01/01
Vol. E97-A  No. 1  pp. 139-151
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Key Based Cryptography
Keyword: 
RC4stream cipherkeystream biasesplaintext recovery attackmultiple key distinguisherkey recovery attackbroadcast setting
 Summary | Full Text:PDF(1.3MB)

Falsification Attacks against WPA-TKIP in a Realistic Environment
Yosuke TODO Yuki OZAWA Toshihiro OHIGASHI Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2012/02/01
Vol. E95-D  No. 2  pp. 588-595
Type of Manuscript:  PAPER
Category: Information Network
Keyword: 
wireless LAN networkWPA-TKIPfalsification attackQoSvulnerability
 Summary | Full Text:PDF(642.8KB)

Generalized Classes of Weak Keys on RC4 Using Predictive State
Ryoichi TERAMURA Toshihiro OHIGASHI Hidenori KUWAKADO Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/01/01
Vol. E94-A  No. 1  pp. 10-18
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Cryptography
Keyword: 
cryptanalysisstream cipherRC4weak keypredictive state
 Summary | Full Text:PDF(630.7KB)

Fast WEP-Key Recovery Attack Using Only Encrypted IP Packets
Ryoichi TERAMURA Yasuo ASAKURA Toshihiro OHIGASHI Hidenori KUWAKADO Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/01/01
Vol. E93-A  No. 1  pp. 164-171
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Cryptanalysis
Keyword: 
cryptanalysisRC4WEPIEEE 802.11wireless LANIP packet
 Summary | Full Text:PDF(832.3KB)

A Chosen-IV Key Recovery Attack on Py and Pypy
Takanori ISOBE Toshihiro OHIGASHI Hidenori KUWAKADO Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2009/01/01
Vol. E92-D  No. 1  pp. 32-40
Type of Manuscript:  PAPER
Category: Application Information Security
Keyword: 
cryptanalysisstream cipherPyPypyeSTREAMkey recovery attack
 Summary | Full Text:PDF(374.5KB)

New Weakness in the Key-Scheduling Algorithm of RC4
Toshihiro OHIGASHI Yoshiaki SHIRAISHI Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 3-11
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Cryptography
Keyword: 
cryptanalysisstream cipherRC4key scheduling algorithm
 Summary | Full Text:PDF(308.7KB)

Internal-State Reconstruction of a Stream Cipher RC4
Yoshiaki SHIRAISHI Toshihiro OHIGASHI Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/10/01
Vol. E86-A  No. 10  pp. 2636-2638
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Information Security
Keyword: 
stream cipherRC4internal-state reconstruction
 Summary | Full Text:PDF(146.9KB)