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IEICE Trans

Toru FUJIWARA

Backdoor Attacks by Leveraging Latent Representation in Competitive Learning for Resistance to Removal
Kazuki IWAHANA Naoto YANAI Atsuo INOMATA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2025/03/01
Vol. E108-A  No. 3  pp. 254-266
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
backdoor attack, pruning, transfer learning, latent representation, competitive learning, 
 Summary | Full Text:PDF
The Weight Distributions of the (256, k) Extended Binary Primitive BCH Codes with k≤71 and k≥187
Toru FUJIWARA Takuya KUSAKA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2021/09/01
Vol. E104-A  No. 9  pp. 1321-1328
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
BCH code, weight distribution, automorphism group of code, affine permutation, SIMD, 
 Summary | Full Text:PDF
The Absolute Consistency Problem for Relational Schema Mappings with Functional Dependencies
Yasunori ISHIHARA Takashi HAYATA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2020/11/01
Vol. E103-D  No. 11  pp. 2278-2288
Type of Manuscript:  PAPER
Category: Data Engineering, Web Information Systems
Keyword: 
data exchange, relational schema mapping, absolute consistency, functional dependency, 
 Summary | Full Text:PDF
Sphere Packing Bound and Gilbert-Varshamov Bound for b-Symbol Read Channels
Seunghoan SONG Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2018/11/01
Vol. E101-A  No. 11  pp. 1915-1924
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
symbol-pair read channel, b-symbol read channel, sphere packing bound, Gilbert-Varshamov (G-V) bound, asymptotic code bound, 
 Summary | Full Text:PDF
Tighter Reductions for Deterministic Identity-Based Signatures
Naoto YANAI Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2018/01/01
Vol. E101-A  No. 1  pp. 64-76
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
identity-based signatures, deterministic identity-based signatures, provable security, CDH problem, random oracle model, tight reduction, 
 Summary | Full Text:PDF
Efficient Usage of Cover Free Families in Broadcast Encryption
Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/06/01
Vol. E99-A  No. 6  pp. 1216-1221
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
cover free family, efficiency, broadcast encryption, upper bound, 
 Summary | Full Text:PDF
Determinacy and Subsumption of Single-Valued Bottom-Up Tree Transducers
Kenji HASHIMOTO Ryuta SAWADA Yasunori ISHIHARA Hiroyuki SEKI Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/03/01
Vol. E99-D  No. 3  pp. 575-587
Type of Manuscript:  Special Section PAPER (Special Section on Foundations of Computer Science---Developments of the Theory of Algorithms and Computation---)
Category: 
Keyword: 
determinacy, subsumption, tree transducer, 
 Summary | Full Text:PDF
On the Impossibility of d-Multiplicative Non-perfect Secret Sharing
Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/02/01
Vol. E98-A  No. 2  pp. 767-770
Type of Manuscript:  LETTER
Category: Cryptography and Information Security
Keyword: 
secret sharing, multiplicative, non-perfect, impossibility, 
 Summary | Full Text:PDF
Individual Restoration of Tampered Pixels for Statistical Fragile Watermarking
Maki YOSHIDA Kazuya OHKITA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/01/01
Vol. E98-D  No. 1  pp. 58-64
Type of Manuscript:  Special Section PAPER (Special Section on Enriched Multimedia)
Category: 
Keyword: 
watermarking, fragile, tampering, detection, restoration, maximum length sequence code, 
 Summary | Full Text:PDF
Decidability of the Security against Inference Attacks Using a Functional Dependency on XML Databases
Kenji HASHIMOTO Hiroto KAWAI Yasunori ISHIHARA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2012/05/01
Vol. E95-D  No. 5  pp. 1365-1374
Type of Manuscript:  Special Section PAPER (Special Section on Formal Approach)
Category: Database Security
Keyword: 
XML database, inference attack, security, verification, functional dependency, 
 Summary | Full Text:PDF
A Recursive Method for Vector Generation in Non-increasing Order of Its Likelihood for All Binary Vectors and Its Application for Linear Block Code Decodings
Takuya KUSAKA Ryuhei YOKOYAMA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/04/01
Vol. E95-A  No. 4  pp. 801-810
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
binary vector, recursive algorithm, MLD, soft-decision, enumeration, 
 Summary | Full Text:PDF
FOREWORD
Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/01/01
Vol. E94-A  No. 1  pp. 1-2
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF
Toward Digital Watermarking for Cryptographic Data
Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/01/01
Vol. E94-A  No. 1  pp. 270-272
Type of Manuscript:  Special Section LETTER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
digital watermarking, cryptographic data, detection, visible, trapdoor for removing, 
 Summary | Full Text:PDF
The Vector Decomposition Problem
Maki YOSHIDA Shigeo MITSUNARI Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/01/01
Vol. E93-A  No. 1  pp. 188-193
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Mathematics
Keyword: 
computational problem, vector decomposition problem, computational Diffie-Hellman problem, elliptic curve, pairing, 
 Summary | Full Text:PDF
Verification of the Security against Inference Attacks on XML Databases
Kenji HASHIMOTO Kimihide SAKANO Fumikazu TAKASUKA Yasunori ISHIHARA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2009/05/01
Vol. E92-D  No. 5  pp. 1022-1032
Type of Manuscript:  Special Section PAPER (Special Section on Formal Approach)
Category: Security
Keyword: 
XML database, inference attack, security, verification, 
 Summary | Full Text:PDF
Flexible Timed-Release Encryption
Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/01/01
Vol. E92-A  No. 1  pp. 222-225
Type of Manuscript:  Special Section LETTER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
timed-release encryption, time-server based approach, global use, flexibility, 
 Summary | Full Text:PDF
Local Weight Distribution of the (256, 93) Third-Order Binary Reed-Muller Code
Kenji YASUNAGA Toru FUJIWARA Tadao KASAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/03/01
Vol. E90-A  No. 3  pp. 698-701
Type of Manuscript:  LETTER
Category: Coding Theory
Keyword: 
local weight distribution, minimal codeword, Reed-Muller code, binary shift, 
 Summary | Full Text:PDF
A New Scheme to Realize the Optimum Watermark Detection for the Additive Embedding Scheme with the Spatial Domain
Takaaki FUJITA Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/01/01
Vol. E90-A  No. 1  pp. 216-225
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
digital watermarking, additive embedding scheme, optimum detection, Neyman-Pearson criterion, 
 Summary | Full Text:PDF
A Private and Consistent Data Retrieval Scheme with Log-Squared Communication
Satoshi NAKAYAMA Maki YOSHIDA Shingo OKAMURA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/01/01
Vol. E90-A  No. 1  pp. 204-215
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
data retrieval, privacy of a user, secrecy of the database, consistency of answers, communication complexity, 
 Summary | Full Text:PDF
Security against Inference Attacks on Negative Information in Object-Oriented Databases
Yasunori ISHIHARA Shuichiro AKO Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/12/01
Vol. E88-D  No. 12  pp. 2767-2776
Type of Manuscript:  PAPER
Category: Database
Keyword: 
object-oriented database, authorization, inference attack, negative information, 
 Summary | Full Text:PDF
Unlinkable Delivery System for Interactive Dramas
Shingo OKAMURA Yoshiyuki KONISHI Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/01/01
Vol. E88-A  No. 1  pp. 262-269
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
interactive drama, delivery control, protection of privacy, partially blind signature scheme, 
 Summary | Full Text:PDF
Sufficient Conditions for Update Operations on Object-Oriented Databases to Preserve the Security against Inference Attacks
Yasunori ISHIHARA Kengo MORI Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2003/10/01
Vol. E86-D  No. 10  pp. 2187-2197
Type of Manuscript:  PAPER
Category: Databases
Keyword: 
object-oriented database, authorization, inference attack, security, incremental checking, 
 Summary | Full Text:PDF
Analysis and Optimization of Kumar-Rajagopalan-Sahai Coding Constructions for Blacklisting Problem
Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/09/01
Vol. E84-A  No. 9  pp. 2338-2345
Type of Manuscript:  PAPER
Category: Information Security
Keyword: 
data security, broadcast distribution system, cover-free family, maximum distance separable code, 
 Summary | Full Text:PDF
Weight Distributions of the Coset Leaders of Some Reed-Muller Codes and BCH Codes
Masaya MAEDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/03/01
Vol. E84-A  No. 3  pp. 851-859
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
binary linear block code, coset, coset leader, weight distribution, Reed-Muller and BCH codes, 
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A Subscriber-Excluding and Traitor-Tracing Broadcast Distribution System
Maki YOSHIDA Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/01/01
Vol. E84-A  No. 1  pp. 247-255
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
broadcast distribution system, subscriber-excluding, pirate decoder, traitor tracing, ElGamal cryptosystem, 
 Summary | Full Text:PDF
The Optimal Sectionalized Trellises for the Generalized Version of Viterbi Algorithm of Linear Block Codes and Its Application to Reed-Muller Codes
Yuansheng TANG Toru FUJIWARA Tadao KASAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/11/25
Vol. E83-A  No. 11  pp. 2329-2340
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
linear block code, sectionalization, minimal sectionalized trellis, generalized Viterbi algorithm, computational complexity, 
 Summary | Full Text:PDF
MAP and LogMAP Decoding Algorithms for Linear Block Codes Using a Code Structure
Yuichi KAJI Ryujiro SHIBUYA Toru FUJIWARA Tadao KASAMI Shu LIN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/10/25
Vol. E83-A  No. 10  pp. 1884-1890
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
MAP decoding, BCJR algorithm, turbo codes, trellis diagram, linear block codes, 
 Summary | Full Text:PDF
Sufficient Conditions for Ruling-Out Useless Iterative Steps in a Class of Iterative Decoding Algorithms
Tadao KASAMI Yuansheng TANG Takuya KOUMOTO Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/10/25
Vol. E82-A  No. 10  pp. 2061-2073
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
soft-decision, iterative decoding, binary block codes, ruling-out conditions, early termination conditions, 
 Summary | Full Text:PDF
A Method for Obtaining the Optimum Sectionalization of the RMLD Algorithm for Non-Linear Rectangular Codes
Yasuhiro MATSUMOTO Toru FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/10/25
Vol. E82-A  No. 10  pp. 2052-2060
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
maximum likelihood decoding, recursive maximum likelihood decoding, rectangular code, optimum sectionalization, dynamic programming approach, 
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A Recursive Maximum Likelihood Decoding Algorithm for Some Transitive Invariant Binary Block Codes
Tadao KASAMI Hitoshi TOKUSHIGE Toru FUJIWARA Hiroshi YAMAMOTO Shu LIN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/09/25
Vol. E81-A  No. 9  pp. 1916-1924
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
recursive maximum likelihood decoding, transitive invariant codes, Reed-Muller codes, extended BCH codes, 
 Summary | Full Text:PDF
Low Weight Subtrellises for Binary Linear Block Codes and Their Applications
Tadao KASAMI Takuya KOUMOTO Toru FUJIWARA Hiroshi YAMAMOTO Yoshihisa DESAKI Shu LIN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/11/25
Vol. E80-A  No. 11  pp. 2095-2103
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
subtrellis diagram, low weight, binary linear code, recursive decoding algorithm, subtrellis search, 
 Summary | Full Text:PDF
An lmproved Method for Formal Security Verification of Cryptographic Protocols
Hajime WATANABE Toru FUJIWARA Tadao KASAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/07/25
Vol. E79-A  No. 7  pp. 1089-1096
Type of Manuscript:  PAPER
Category: Information Security
Keyword: 
authentication, computer security, cryptographic protocol, protocol verification, 
 Summary | Full Text:PDF
The Weight Distributions of Cosets of the Second-Order Reed-Muller Code of Length 128 in the Third-Order Reed-Muller Code of Length 128
Tadao KASAMI Toru FUJIWARA Yoshihisa DESAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/04/25
Vol. E79-A  No. 4  pp. 600-608
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
linear block codes, Reed-Muller codes, coset and weight distribution, 
 Summary | Full Text:PDF
Average Complexity Evaluation of an MLD Algorithm Using the Trellis Structure for a Linear Block Code
Hidehisa NAGANO Toru FUJIWARA Tadao KASAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/09/25
Vol. E78-A  No. 9  pp. 1209-1214
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
maximum likelihood decoding, linear block code, BCH code, Reed-Muller code, L-section minimal trellis diagram, 
 Summary | Full Text:PDF
A Method for Computing the Weight Distribution of a Block Code by Using Its Trellis Diagram
Yoshihisa DESAKI Toru FUJIWARA Tadao KASAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/08/25
Vol. E77-A  No. 8  pp. 1230-1237
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
block codes, weight distribution, trellis diagram, BCH codes, 
 Summary | Full Text:PDF
On Branch Labels of Parallel Components of the L-Section Minimal Trellis Diagrams for Binary Linear Block Codes
Tadao KASAMI Toru FUJIWARA Yoshihisa DESAKI Shu LIN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/06/25
Vol. E77-A  No. 6  pp. 1058-1068
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
linear block codes, trellis diagram, parallel structure and Reed-Muller codes, 
 Summary | Full Text:PDF
On Structural Complexity of the L-Section Minimal Trellis Diagrams for Binary Linear Block Codes
Tadao KASAMI Toyoo TAKATA Toru FUJIWARA Shu LIN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/09/25
Vol. E76-A  No. 9  pp. 1411-1421
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
linear code, block code, trellis diagram, Reed-Muller code, 
 Summary | Full Text:PDF
A System for Deciding the Security of Cryptographic Protocols
Hajime WATANABE Toru FUJIWARA Tadao KASAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/01/25
Vol. E76-A  No. 1  pp. 96-103
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
computer security, cryptographic protocol, protocol verification, 
 Summary | Full Text:PDF
Comparison of Aliasing Probability for Multiple MISRs and M-Stage MISRs with m Inputs
Kazuhiko IWASAKI Shou-Ping FENG Toru FUJIWARA Tadao KASAMI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1992/11/25
Vol. E75-D  No. 6  pp. 835-841
Type of Manuscript:  Special Section PAPER (Special Issue on Pacific Rim International Symposium on Fault Tolerant Systems)
Category: 
Keyword: 
BIST, aliasing probability, multiple MISR, M-stage MISR with m imputs, binary symmetric channel, 
 Summary | Full Text:PDF
Cross-Over Component Code Construction for Multi-Level Block Modulation Codes
Tadao KASAMI Toyoo TAKATA Toru FUJIWARA Shu LIN 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/10/25
Vol. E73-E  No. 10  pp. 1657-1665
Type of Manuscript:  Special Section PAPER (Special Issue on Communication Theory and Its Applications)
Category: Modulation and Demodulation
Keyword: 
 Summary | Full Text:PDF