Kazuo Ohta

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86 publications in security and cryptology related venues
Year
Venue
Title
2025
conf/asiapkc
Revisiting Relations of Security Notions in Searchable Encryption.
Kazuki Sato Takumi Amada Kyoichi Asano Yohei Watanabe Mitsugu Iwamoto Kazuo Ohta
2024
conf/sacrypt
Multi-user Dynamic Searchable Encryption for Prefix-Fixing Predicates from Symmetric-Key Primitives.
Takato Hirano Yutaka Kawai Yoshihiro Koseki Satoshi Yasuda Yohei Watanabe Takumi Amada Mitsugu Iwamoto Kazuo Ohta
2020
conf/provsec
Achieving Pairing-Free Aggregate Signatures using Pre-Communication between Signers.
Kaoru Takemure Yusuke Sakai Bagus Santoso Goichiro Hanaoka Kazuo Ohta
2019
conf/tcc
Efficient Private PEZ Protocols for Symmetric Functions.
Yoshiki Abe Mitsugu Iwamoto Kazuo Ohta
2016
conf/iwsec
Simple, Secure, and Efficient Searchable Symmetric Encryption with Multiple Encrypted Indexes.
Takato Hirano Mitsuhiro Hattori Yutaka Kawai Nori Matsuda Mitsugu Iwamoto Kazuo Ohta Yusuke Sakai Tatsuji Munaka
2016
conf/cans
Probabilistic Generation of Trapdoors: Reducing Information Leakage of Searchable Symmetric Encryption.
Kenichiro Hayasaka Yutaka Kawai Yoshihiro Koseki Takato Hirano Kazuo Ohta Mitsugu Iwamoto
2016
conf/cans
Efficient Card-Based Cryptographic Protocols for Millionaires' Problem Utilizing Private Permutations.
Takeshi Nakai Yuuki Tokushige Yuto Misawa Mitsugu Iwamoto Kazuo Ohta
2015
conf/acisp
Dynamic Threshold Public-Key Encryption with Decryption Consistency from Static Assumptions.
Yusuke Sakai Keita Emura Jacob C. N. Schuldt Goichiro Hanaoka Kazuo Ohta
2014
conf/ccs
Privacy-preserving smart metering with verifiability for both billing and energy management.
Kazuma Ohara Yusuke Sakai Fumiaki Yoshida Mitsugu Iwamoto Kazuo Ohta
2014
conf/acns
Reset Indifferentiability from Weakened Random Oracle Salvages One-Pass Hash Functions.
Yusuke Naito Kazuki Yoneyama Kazuo Ohta
2014
conf/ctrsa
An Automated Evaluation Tool for Improved Rebound Attack: New Distinguishers and Proposals of ShiftBytes Parameters for Grøstl.
Yu Sasaki Yuuki Tokushige Lei Wang Mitsugu Iwamoto Kazuo Ohta
2014
conf/africacrypt
Constant Rounds Almost Linear Complexity Multi-party Computation for Prefix Sum.
Kazuma Ohara Kazuo Ohta Koutarou Suzuki Kazuki Yoneyama
2012
journals/tifs
Information-Theoretic Approach to Optimal Differential Fault Analysis.
Kazuo Sakiyama Yang Li Mitsugu Iwamoto Kazuo Ohta
2012
journals/tifs
New Fault-Based Side-Channel Attack Using Fault Sensitivity.
Yang Li Kazuo Ohta Kazuo Sakiyama
2012
conf/icisc
Key-Dependent Weakness of AES-Based Ciphers under Clockwise Collision Distinguisher.
Toshiki Nakasone Yang Li Yu Sasaki Mitsugu Iwamoto Kazuo Ohta Kazuo Sakiyama
2012
conf/pkc
On the Security of Dynamic Group Signatures: Preventing Signature Hijacking.
Yusuke Sakai Jacob C. N. Schuldt Keita Emura Goichiro Hanaoka Kazuo Ohta
2012
conf/fdtc
An Efficient Countermeasure against Fault Sensitivity Analysis Using Configurable Delay Blocks.
Sho Endo Yang Li Naofumi Homma Kazuo Sakiyama Kazuo Ohta Takafumi Aoki
2012
conf/iwsec
Polynomial-Advantage Cryptanalysis of 3D Cipher and 3D-Based Hash Function.
Lei Wang Yu Sasaki Kazuo Sakiyama Kazuo Ohta
2012
conf/iwsec
Boomerang Distinguishers for Full HAS-160 Compression Function.
Yu Sasaki Lei Wang Yasuhiro Takasaki Kazuo Sakiyama Kazuo Ohta
2012
conf/africacrypt
Three-Subset Meet-in-the-Middle Attack on Reduced XTEA.
Yu Sasaki Lei Wang Yasuhide Sakai Kazuo Sakiyama Kazuo Ohta
2011
conf/fc
A Study on Computational Formal Verification for Practical Cryptographic Protocol: The Case of Synchronous RFID Authentication.
Yoshikazu Hanatani Miyako Ohkubo Shin'ichiro Matsuo Kazuo Sakiyama Kazuo Ohta
2011
conf/provsec
Security of Practical Cryptosystems Using Merkle-Damgård Hash Function in the Ideal Cipher Model.
Yusuke Naito Kazuki Yoneyama Lei Wang Kazuo Ohta
2011
conf/ches
Uniqueness Enhancement of PUF Responses Based on the Locations of Random Outputting RS Latches.
Dai Yamamoto Kazuo Sakiyama Mitsugu Iwamoto Kazuo Ohta Takao Ochiai Masahiko Takenaka Kouichi Itoh
2011
conf/ches
On the Power of Fault Sensitivity Analysis and Collision Side-Channel Attacks in a Combined Setting.
Amir Moradi Oliver Mischke Christof Paar Yang Li Kazuo Ohta Kazuo Sakiyama
2011
conf/host
Revisit fault sensitivity analysis on WDDL-AES.
Yang Li Kazuo Ohta Kazuo Sakiyama
2011
conf/ctrsa
(Second) Preimage Attacks on Step-Reduced RIPEMD/RIPEMD-128 with a New Local-Collision Approach.
Lei Wang Yu Sasaki Wataru Komatsubara Kazuo Ohta Kazuo Sakiyama
2011
conf/fdtc
Fault Sensitivity Analysis Against Elliptic Curve Cryptosystems.
Hikaru Sakamoto Yang Li Kazuo Ohta Kazuo Sakiyama
2011
conf/iwsec
Experimental Verification of Super-Sbox Analysis - Confirmation of Detailed Attack Complexity.
Yu Sasaki Naoyuki Takayanagi Kazuo Sakiyama Kazuo Ohta
2010
conf/ches
Fault Sensitivity Analysis.
Yang Li Kazuo Sakiyama Shigeto Gomisawa Toshinori Fukunaga Junko Takahashi Kazuo Ohta
2010
conf/host
Prototyping Platform for Performance Evaluation of SHA-3 Candidates.
Kazuyuki Kobayashi Jun Ikegami Kazuo Sakiyama Kazuo Ohta Miroslav Knezevic Ünal Koçabas Junfeng Fan Ingrid Verbauwhede Eric Xu Guo Shin'ichiro Matsuo Sinan Huang Leyla Nazhandali Akashi Satoh
2010
conf/wisa
Combination of SW Countermeasure and CPU Modification on FPGA against Power Analysis.
Daisuke Nakatsu Yang Li Kazuo Sakiyama Kazuo Ohta
2010
conf/ctrsa
Improving Efficiency of an ‘On the Fly' Identification Scheme by Perfecting Zero-Knowledgeness.
Bagus Santoso Kazuo Ohta Kazuo Sakiyama Goichiro Hanaoka
2010
conf/iwsec
A Generic Method for Reducing Ciphertext Length of Reproducible KEMs in the RO Model.
Yusuke Sakai Goichiro Hanaoka Kaoru Kurosawa Kazuo Ohta
2010
conf/iwsec
Universally Composable NBAC-Based Fair Voucher Exchange for Mobile Environments.
Kazuki Yoneyama Masayuki Terada Sadayuki Hongo Kazuo Ohta
2010
conf/asiacrypt
Non-full-active Super-Sbox Analysis: Applications to ECHO and Grøstl.
Yu Sasaki Yang Li Lei Wang Kazuo Sakiyama Kazuo Ohta
2009
conf/acns
Algorithmic Tamper Proof (ATP) Counter Units for Authentication Devices Using PIN.
Yuichi Komano Kazuo Ohta Hideyuki Miyake Atsushi Shimbo
2009
conf/icics
Security Evaluation of a DPA-Resistant S-Box Based on the Fourier Transform.
Yang Li Kazuo Sakiyama Shin-ichi Kawamura Yuichi Komano Kazuo Ohta
2009
conf/ctrsa
Fault Analysis Attack against an AES Prototype Chip Using RSL.
Kazuo Sakiyama Tatsuya Yagi Kazuo Ohta
2009
conf/iwsec
Bit-Free Collision: Application to APOP Attack.
Lei Wang Yu Sasaki Kazuo Sakiyama Kazuo Ohta
2009
conf/asiacrypt
How to Confirm Cryptosystems Security: The Original Merkle-Damgård Is Still Alive!
Yusuke Naito Kazuki Yoneyama Lei Wang Kazuo Ohta
2008
conf/ccs
A strict evaluation method on the number of conditions for the SHA-1 collision search.
Jun Yajima Terutoshi Iwasaki Yusuke Naito Yu Sasaki Takeshi Shimoyama Noboru Kunihiro Kazuo Ohta
2008
conf/acns
Attribute-Based Encryption with Partially Hidden Encryptor-Specified Access Structures.
Takashi Nishide Kazuki Yoneyama Kazuo Ohta
2008
conf/provsec
Leaky Random Oracle (Extended Abstract).
Kazuki Yoneyama Satoshi Miyagawa Kazuo Ohta
2008
conf/wisa
Sanitizable and Deletable Signature.
Tetsuya Izu Noboru Kunihiro Kazuo Ohta Makoto Sano Masahiko Takenaka
2008
conf/wisa
Extension of Secret Handshake Protocols with Multiple Groups in Monotone Condition.
Yutaka Kawai Shotaro Tanno Takahiro Kondo Kazuki Yoneyama Noboru Kunihiro Kazuo Ohta
2008
conf/ctrsa
Security of MD5 Challenge and Response: Extension of APOP Password Recovery Attack.
Yu Sasaki Lei Wang Kazuo Ohta Noboru Kunihiro
2008
conf/eurocrypt
New Key-Recovery Attacks on HMAC/NMAC-MD4 and NMAC-MD5.
Lei Wang Kazuo Ohta Noboru Kunihiro
2008
conf/africacrypt
Password Recovery on Challenge and Response: Impossible Differential Attack on Hash Function.
Yu Sasaki Lei Wang Kazuo Ohta Noboru Kunihiro
2007
conf/fse
New Message Difference for MD4.
Yu Sasaki Lei Wang Kazuo Ohta Noboru Kunihiro
2007
conf/ccs
Ring signatures: universally composable definitions and constructions.
Kazuki Yoneyama Kazuo Ohta
2007
conf/acisp
A New Strategy for Finding a Differential Path of SHA-1.
Jun Yajima Yu Sasaki Yusuke Naito Terutoshi Iwasaki Takeshi Shimoyama Noboru Kunihiro Kazuo Ohta
2007
conf/pkc
Multiparty Computation for Interval, Equality, and Comparison Without Bit-Decomposition Protocol.
Takashi Nishide Kazuo Ohta
2007
conf/icics
Modeling Agreement Problems in the Universal Composability Framework.
Masayuki Terada Kazuki Yoneyama Sadayuki Hongo Kazuo Ohta
2006
conf/ccs
Problems on the MR micropayment schemes.
Masahiro Mambo Moisés Salinas-Rosales Kazuo Ohta Noboru Kunihiro
2006
conf/fc
Provably Secure Electronic Cash Based on Blind Multisignature Schemes.
Yoshikazu Hanatani Yuichi Komano Kazuo Ohta Noboru Kunihiro
2006
conf/ctrsa
Toward the Fair Anonymous Signatures: Deniable Ring Signatures.
Yuichi Komano Kazuo Ohta Atsushi Shimbo Shin-ichi Kawamura
2006
conf/asiacrypt
Improved Collision Search for SHA-0.
Yusuke Naito Yu Sasaki Takeshi Shimoyama Jun Yajima Noboru Kunihiro Kazuo Ohta
2005
conf/icisc
Improved Collision Attack on MD4 with Probability Almost 1.
Yusuke Naito Yu Sasaki Noboru Kunihiro Kazuo Ohta
2005
conf/wisa
Analysis on the Clockwise Transposition Routing for Dedicated Factoring Devices.
Tetsuya Izu Noboru Kunihiro Kazuo Ohta Takeshi Shimoyama
2004
conf/icics
Taxonomic Consideration to OAEP Variants and Their Security.
Yuichi Komano Kazuo Ohta
2003
conf/crypto
Efficient Universal Padding Techniques for Multiplicative Trapdoor One-Way Permutation.
Yuichi Komano Kazuo Ohta
2001
conf/ccs
Accountable-subgroup multisignatures: extended abstract.
Silvio Micali Kazuo Ohta Leonid Reyzin
1998
conf/crypto
On Concrete Security Treatment of Signatures Derived from Identification.
Kazuo Ohta Tatsuaki Okamoto
1998
conf/sacrypt
A Strategy for Constructing Fast Round Functions with Practical Security Against Differential and Linear Cryptanalysis.
Masayuki Kanda Youichi Takashima Tsutomu Matsumoto Kazumaro Aoki Kazuo Ohta
1997
conf/icics
On strict estimation method of provable security against differential and linear cryptanalysis.
Yasuyoshi Kaneko Shiho Moriai Kazuo Ohta
1995
conf/crypto
Improving the Search Algorithm for the Best Linear Expression.
Kazuo Ohta Shiho Moriai Kazumaro Aoki
1994
conf/ccs
How to Simultaneously Exchange Secrets by General Assumptions.
Tatsuaki Okamoto Kazuo Ohta
1994
conf/crypto
Linear Cryptanalysis of the Fast Data Encipherment Algorithm.
Kazuo Ohta Kazumaro Aoki
1993
conf/crypto
Differential Attack on Message Authentication Codes.
Kazuo Ohta Mitsuru Matsui
1992
conf/eurocrypt
Secure Bit Commitment Function against Divertibility.
Kazuo Ohta Tatsuaki Okamoto Atsushi Fujioka
1992
conf/asiacrypt
A Practical Secret Voting Scheme for Large Scale Elections.
Atsushi Fujioka Tatsuaki Okamoto Kazuo Ohta
1991
conf/crypto
Universal Electronic Cash.
Tatsuaki Okamoto Kazuo Ohta
1991
conf/crypto
A Switching Closure Test to Analyze Cryptosystems.
Hikaru Morita Kazuo Ohta Shoji Miyaguchi
1991
conf/eurocrypt
Interactive Bi-Proof Systems and Undeniable Signature Schemes.
Atsushi Fujioka Tatsuaki Okamoto Kazuo Ohta
1991
conf/eurocrypt
Direct Zero Knowledge Proofs of Computational Power in Five Rounds.
Tatsuaki Okamoto David Chaum Kazuo Ohta
1991
conf/asiacrypt
A Digital Multisignature Scheme Based on the Fiat-Shamir Scheme.
Kazuo Ohta Tatsuaki Okamoto
1991
conf/asiacrypt
Results of Switching-Closure-Test on FEAL (Extended Abstract).
Hikaru Morita Kazuo Ohta Shoji Miyaguchi
1990
conf/crypto
How to Utilize the Randomness of Zero-Knowledge Proofs.
Tatsuaki Okamoto Kazuo Ohta
1990
conf/eurocrypt
Membership Authentication for Hierarchical Multigroups Using the Extended Fiat-Shamir Scheme.
Kazuo Ohta Tatsuaki Okamoto Kenji Koyama
1990
conf/eurocrypt
Confirmation that Some Hash Functions Are Not Collision Free.
Shoji Miyaguchi Kazuo Ohta Masahiko Iwata
1990
conf/asiacrypt
Meet-in-the-Middle Attack on Digital Signature Schemes.
Kazuo Ohta Kenji Koyama
1989
conf/crypto
Disposable Zero-Knowledge Authentications and Their Applications to Untraceable Electronic Cash.
Tatsuaki Okamoto Kazuo Ohta
1989
conf/eurocrypt
Divertible Zero Knowledge Interactive Proofs and Commutative Random Self-Reducibility.
Tatsuaki Okamoto Kazuo Ohta
1988
conf/crypto
A Modification of the Fiat-Shamir Scheme.
Kazuo Ohta Tatsuaki Okamoto
1988
conf/eurocrypt
Security of Improved Identity-Based Conference Key Distribution Systems.
Kenji Koyama Kazuo Ohta
1987
conf/crypto
Identity-based Conference Key Distribution Systems.
Kenji Koyama Kazuo Ohta

Coauthors

Akashi Satoh (1)
Amir Moradi (1)
Atsushi Fujioka (3)
Atsushi Shimbo (2)
Bagus Santoso (2)
Christof Paar (1)
Dai Yamamoto (1)
Daisuke Nakatsu (1)
David Chaum (1)
Eric Xu Guo (1)
Fumiaki Yoshida (1)
Goichiro Hanaoka (5)
Hideyuki Miyake (1)
Hikaru Morita (2)
Hikaru Sakamoto (1)
Ingrid Verbauwhede (1)
Jacob C. N. Schuldt (2)
Jun Ikegami (1)
Jun Yajima (3)
Junfeng Fan (1)
Junko Takahashi (1)
Kaoru Kurosawa (1)
Kaoru Takemure (1)
Kazuki Sato (1)
Kazuki Yoneyama (10)
Kazuma Ohara (2)
Kazumaro Aoki (3)
Kazuo Ohta (86)
Kazuo Sakiyama (22)
Kazuyuki Kobayashi (1)
Keita Emura (2)
Kenichiro Hayasaka (1)
Kenji Koyama (4)
Kouichi Itoh (1)
Koutarou Suzuki (1)
Kyoichi Asano (1)
Lei Wang (13)
Leonid Reyzin (1)
Leyla Nazhandali (1)
Makoto Sano (1)
Masahiko Iwata (1)
Masahiko Takenaka (2)
Masahiro Mambo (1)
Masayuki Kanda (1)
Masayuki Terada (2)
Miroslav Knezevic (1)
Mitsugu Iwamoto (11)
Mitsuhiro Hattori (1)
Mitsuru Matsui (1)
Miyako Ohkubo (1)
Moisés Salinas-Rosales (1)
Naofumi Homma (1)
Naoyuki Takayanagi (1)
Noboru Kunihiro (13)
Nori Matsuda (1)
Oliver Mischke (1)
Sadayuki Hongo (2)
Satoshi Miyagawa (1)
Satoshi Yasuda (1)
Shigeto Gomisawa (1)
Shiho Moriai (2)
Shin'ichiro Matsuo (2)
Shin-ichi Kawamura (2)
Sho Endo (1)
Shoji Miyaguchi (3)
Shotaro Tanno (1)
Silvio Micali (1)
Sinan Huang (1)
Takafumi Aoki (1)
Takahiro Kondo (1)
Takao Ochiai (1)
Takashi Nishide (2)
Takato Hirano (3)
Takeshi Nakai (1)
Takeshi Shimoyama (4)
Takumi Amada (2)
Tatsuaki Okamoto (13)
Tatsuji Munaka (1)
Tatsuya Yagi (1)
Terutoshi Iwasaki (2)
Tetsuya Izu (2)
Toshiki Nakasone (1)
Toshinori Fukunaga (1)
Tsutomu Matsumoto (1)
Ünal Koçabas (1)
Wataru Komatsubara (1)
Yang Li (11)
Yasuhide Sakai (1)
Yasuhiro Takasaki (1)
Yasuyoshi Kaneko (1)
Yohei Watanabe (2)
Yoshihiro Koseki (2)
Yoshikazu Hanatani (2)
Yoshiki Abe (1)
Youichi Takashima (1)
Yu Sasaki (16)
Yuichi Komano (6)
Yusuke Naito (7)
Yusuke Sakai (6)
Yutaka Kawai (4)
Yuto Misawa (1)
Yuuki Tokushige (2)
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