Kazuma Ohara

29 papers A* 9A 2B 1Journal 11Unranked 6
YearRankTypeTitle / Venue / Authors
2026 J jnl
Clarifying CPU Vendor's Responsibilities for Remote Attestation with Intel SGX.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Takashi Yagawa, Tadanori Teruya, Kazuma Ohara, Kuniyasu Suzaki, Hirotake Abe
2025 J jnl
Efficient Two-Party Exponentiation from Quotient Transfer.
IEICE Trans. Inf. Syst.
Yi Lu, Keisuke Hara, Kazuma Ohara, Jacob C. N. Schuldt, Keisuke Tanaka
2022 — conf
Efficient Dynamic Searchable Encryption with Forward Privacy under the Decent Leakage.
CODASPY
Yohei Watanabe, Kazuma Ohara, Mitsugu Iwamoto, Kazuo Ohta
2022 B conf
Efficient Two-Party Exponentiation from Quotient Transfer.
ACNS
Yi Lu, Keisuke Hara, Kazuma Ohara, Jacob C. N. Schuldt, Keisuke Tanaka
2022 J jnl
How to Make a Secure Index for Searchable Symmetric Encryption, Revisited.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yohei Watanabe, Takeshi Nakai, Kazuma Ohara, Takuya Nojima, Yexuan Liu, Mitsugu Iwamoto, Kazuo Ohta
2022 A conf
Memory and Round-Efficient MPC Primitives in the Pre-Processing Model from Unit Vectorization.
AsiaCCS
Nuttapong Attrapadung, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Kazunari Tozawa
2022 A* conf
Secure Parallel Computation on Privately Partitioned Data and Applications.
CCS
Nuttapong Attrapadung, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Tadanori Teruya, Kazunari Tozawa
2021 J jnl
How to Make a Secure Index for Searchable Symmetric Encryption, Revisited.
IACR Cryptol. ePrint Arch.
Yohei Watanabe, Takeshi Nakai, Kazuma Ohara, Takuya Nojima, Yexuan Liu, Mitsugu Iwamoto, Kazuo Ohta
2021 — conf
Non-interactive Secure Multiparty Computation for Symmetric Functions, Revisited: More Efficient Constructions and Extensions.
CRYPTO (2)
Reo Eriguchi, Kazuma Ohara, Shota Yamada, Koji Nuida
2021 A* conf
Oblivious Linear Group Actions and Applications.
CCS
Nuttapong Attrapadung, Goichiro Hanaoka, Takahiro Matsuda, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Tadanori Teruya, Kazunari Tozawa
2021 A* conf
Revisiting Fuzzy Signatures: Towards a More Risk-Free Cryptographic Authentication System based on Biometrics.
CCS
Shuichi Katsumata, Takahiro Matsuda, Wataru Nakamura, Kazuma Ohara, Kenta Takahashi
2021 J jnl
Revisiting Fuzzy Signatures: Towards a More Risk-Free Cryptographic Authentication System based on Biometrics.
CoRR
Shuichi Katsumata, Takahiro Matsuda, Wataru Nakamura, Kazuma Ohara, Kenta Takahashi
2021 A* conf
Secure Graph Analysis at Scale.
CCS
Toshinori Araki, Jun Furukawa, Kazuma Ohara, Benny Pinkas, Hanan Rosemarin, Hikaru Tsuchida
2020 — conf
Semantic Definition of Anonymity in Identity-Based Encryption and Its Relation to Indistinguishability-Based Definition.
ESORICS (2)
Goichiro Hanaoka, Misaki Komatsu, Kazuma Ohara, Yusuke Sakai, Shota Yamada
2019 J jnl
Group Signatures with Message-Dependent Opening: Formal Definitions and Constructions.
Secur. Commun. Networks
Keita Emura, Goichiro Hanaoka, Yutaka Kawai, Takahiro Matsuda, Kazuma Ohara, Kazumasa Omote, Yusuke Sakai
2019 J jnl
Multi-Party Computation for Modular Exponentiation Based on Replicated Secret Sharing.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuma Ohara, Yohei Watanabe, Mitsugu Iwamoto, Kazuo Ohta
2019 J jnl
Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuma Ohara, Keita Emura, Goichiro Hanaoka, Ai Ishida, Kazuo Ohta, Yusuke Sakai
2018 A* conf
Generalizing the SPDZ Compiler For Other Protocols.
CCS
Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Yehuda Lindell, Kazuma Ohara, Hikaru Tsuchida
2018 J jnl
Generalizing the SPDZ Compiler For Other Protocols.
IACR Cryptol. ePrint Arch.
Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Yehuda Lindell, Kazuma Ohara, Hikaru Tsuchida
2018 A* conf
How to Choose Suitable Secure Multiparty Computation Using Generalized SPDZ.
CCS
Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Kazuma Ohara, Hikaru Tsuchida
2017 A* conf
Optimized Honest-Majority MPC for Malicious Adversaries - Breaking the 1 Billion-Gate Per Second Barrier.
IEEE Symposium on Security and Privacy
Toshinori Araki, Assi Barak, Jun Furukawa, Tamar Lichter, Yehuda Lindell, Ariel Nof, Kazuma Ohara, Adi Watzman, Or Weinstein
2016 A* conf
DEMO: High-Throughput Secure Three-Party Computation of Kerberos Ticket Generation.
CCS
Toshinori Araki, Assaf Barak, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara
2016 A* conf
High-Throughput Semi-Honest Secure Three-Party Computation with an Honest Majority.
CCS
Toshinori Araki, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara
2016 J jnl
High-Throughput Semi-Honest Secure Three-Party Computation with an Honest Majority.
IACR Cryptol. ePrint Arch.
Toshinori Araki, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara
2016 J jnl
Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology.
IACR Cryptol. ePrint Arch.
Kazuma Ohara, Keita Emura, Goichiro Hanaoka, Ai Ishida, Kazuo Ohta, Yusuke Sakai
2014 — conf
An energy-efficient dynamic-integrator-based ΔΣ modulator.
ICECS
Ryo Matsushiba, Kazuma Ohara, Takao Waho
2014 — conf
Constant Rounds Almost Linear Complexity Multi-party Computation for Prefix Sum.
AFRICACRYPT
Kazuma Ohara, Kazuo Ohta, Koutarou Suzuki, Kazuki Yoneyama
2014 — conf
Privacy-preserving smart metering with verifiability for both billing and energy management.
AsiaPKC@AsiaCCS
Kazuma Ohara, Yusuke Sakai, Fumiaki Yoshida, Mitsugu Iwamoto, Kazuo Ohta
2013 A conf
A group signature scheme with unbounded message-dependent opening.
AsiaCCS
Kazuma Ohara, Yusuke Sakai, Keita Emura, Goichiro Hanaoka