Takanori ISOBE


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)

Cryptanalysis of Reduced Kreyvium
Yuhei WATANABE Takanori ISOBE Masakatu MORII 
Publication:   
Publication Date: 2018/09/01
Vol. E101-A  No. 9  pp. 1548-1556
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
differential cryptanalysisconditional differentialhigher-order differentialdistinguisherkey recovery attackKreyvium
 Summary | Full Text:PDF(1MB)

On Design of Robust Lightweight Stream Cipher with Short Internal State
Subhadeep BANIK Takanori ISOBE Masakatu MORII 
Publication:   
Publication Date: 2018/01/01
Vol. E101-A  No. 1  pp. 99-109
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
even-mansourlightweightstream ciphershort internal stateTMD tradeoff
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Analysis and Improvements of the Full Spritz Stream Cipher
Subhadeep BANIK Takanori ISOBE Masakatu MORII 
Publication:   
Publication Date: 2017/06/01
Vol. E100-A  No. 6  pp. 1296-1305
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
RC4Spritzstream ciphershort-term biaslong-term biasdistinguishing attackplaintext recovery attackstate recovery attack
 Summary | Full Text:PDF(870.2KB)

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)

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)