Kazumaro AOKI


Provable Security against Cryptanalysis with Impossible Differentials
Kazumaro AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/01/01
Vol. E96-A  No. 1  pp. 233-236
Type of Manuscript: Special Section LETTER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
impossible differentialcryptanalysis with impossible differentialsdifferential cryptanalysisprovable securityMarkov cipher
  Summary |  Full Text:PDF (78.7KB)

Open-Key Distinguishers for the Internal Block Cipher of Tweaked Lesamnta
Yu SASAKI  Kazumaro AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/01/01
Vol. E96-A  No. 1  pp. 141-149
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Functions
Keyword: 
integral attackmiddletext distinguisherknown-keychosen-keyLesamntahashSHA-3
  Summary |  Full Text:PDF (468.2KB)

Preimage Attacks against PKC98-Hash and HAS-V
Yu SASAKI  Florian MENDEL  Kazumaro AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/01/01
Vol. E95-A  No. 1  pp. 111-124
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Function
Keyword: 
PKC98-HashHAS-VpreimageDavies-Meyernon-injective step function
  Summary |  Full Text:PDF (678.4KB)

Practical Password Recovery Attacks on MD4 Based Prefix and Hybrid Authentication Protocols
Yu SASAKI  Lei WANG  Kazuo OHTA  Kazumaro AOKI  Noboru KUNIHIRO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/01/01
Vol. E93-A  No. 1  pp. 84-92
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Function
Keyword: 
challenge and responseprefixhybridpassword recovery attacklocal collisionhash functionMD4
  Summary |  Full Text:PDF (338.4KB)

Bucket Sieving
Kazumaro AOKI  Hiroki UEDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/08/01
Vol. E92-A  No. 8  pp. 1845-1850
Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Theory
Keyword: 
integer factoringsieving algorithmnumber field sievelargish primebucket sortradix sort
  Summary |  Full Text:PDF (206.8KB)

Efficient Algorithms for Tate Pairing
Tetsutaro KOBAYASHI  Kazumaro AOKI  Hideki IMAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/01/01
Vol. E89-A  No. 1  pp. 134-143
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Elliptic Curve Cryptography
Keyword: 
Weil pairingTate pairingelliptic curve cryptosystemfast computation
  Summary |  Full Text:PDF (209.4KB)

Improvements of Addition Algorithm on Genus 3 Hyperelliptic Curves and Their Implementation
Masaki GONDA  Kazuto MATSUO  Kazumaro AOKI  Jinhui CHAO  Shigeo TSUJII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/01/01
Vol. E88-A  No. 1  pp. 89-96
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Cryptography
Keyword: 
genus 3 hyperelliptic curveshyperelliptic curve cryptosystemsaddition algorithmCantor algorithmHarley algorithmToom's multiplication
  Summary |  Full Text:PDF (225.1KB)

A Cyclic Window Algorithm for Elliptic Curves over OEF
Tetsutaro KOBAYASHI  Fumitaka HOSHINO  Kazumaro AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/01/01
Vol. E86-A  No. 1  pp. 121-128
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Asymmetric Ciphers
Keyword: 
cyclic window algorithmoptimal extension fieldbase-φ expansionelliptic curve cryptosystem
  Summary |  Full Text:PDF (246.9KB)

The 128-Bit Block Cipher Camellia
Kazumaro AOKI  Tetsuya ICHIKAWA  Masayuki KANDA  Mitsuru MATSUI  Shiho MORIAI  Junko NAKAJIMA  Toshio TOKITA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/01/01
Vol. E85-A  No. 1  pp. 11-24
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
block cipherblock cipher designcryptanalysisCamellia
  Summary |  Full Text:PDF (709.5KB)

Optimized Software Implementations of E2
Kazumaro AOKI  Hiroki UEDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/20
Vol. E83-A  No. 1  pp. 101-105
Type of Manuscript: Special Section LETTER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
E2SPNoptimization32-bit processor64-bit processorinverse
  Summary |  Full Text:PDF (236.1KB)

Practical Evaluation of Security against Generalized Interpolation Attack
Kazumaro AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/20
Vol. E83-A  No. 1  pp. 33-38
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
interpolation attacklinear sum attackhigher order differential attackCRYPTONE2RIJNDAEL
  Summary |  Full Text:PDF (267.9KB)

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: 2000/01/20
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)

Linear Cryptanalysis of FEAL
Kazumaro AOKI  Kazuo OHTA  Shiho MORIAI  Mitsuru MATSUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/01/20
Vol. E81-A  No. 1  pp. 88-97
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
linear cryptanalysis1R-attack2R-attackeffective key bitseffective text bitsFEAL
  Summary |  Full Text:PDF (778.9KB)

The Best Differential Characteristic Search of FEAL
Kazumaro AOKI  Kunio KOBAYASHI  Shiho MORIAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/01/20
Vol. E81-A  No. 1  pp. 98-104
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
search algorithmdifferential cryptanalysisbest differential characteristicFEAL
  Summary |  Full Text:PDF (560.3KB)

Key-Dependency of Linear Probability of RC5
Shiho MORIAI  Kazumaro AOKI  Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/01/20
Vol. E80-A  No. 1  pp. 9-18
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
RC5linear cryptanalysislinear probabilityweak keykey-dependency
  Summary |  Full Text:PDF (662.2KB)

Strict Evaluation of the Maximum Average of Differential Probability and the Maximum Average of Linear Probability
Kazumaro AOKI  Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/01/20
Vol. E80-A  No. 1  pp. 2-8
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
Feistel cipherdifferential cryptanalysislinear cryptanalysisdifferential probabilitypotential of linear approximate hull
  Summary |  Full Text:PDF (405.8KB)

The Best Linear Expression Search of FEAL
Shiho MORIAI  Kazumaro AOKI  Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/01/20
Vol. E79-A  No. 1  pp. 2-11
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
Linear Cryptanalysisbest linear expressionFEALsearch algorithm
  Summary |  Full Text:PDF (757KB)

Differential-Linear Cryptanalysis of FEAL-8
Kazumaro AOKI  Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/01/20
Vol. E79-A  No. 1  pp. 20-27
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
code breakblock cipherdifferential-linear cryptanalysisFEAL
  Summary |  Full Text:PDF (563.4KB)