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2020 – today
- 2022
[j4]Yohei Watanabe, Takeshi Nakai, Kazuma Ohara, Takuya Nojima, Yexuan Liu, Mitsugu Iwamoto, Kazuo Ohta:
How to Make a Secure Index for Searchable Symmetric Encryption, Revisited. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 105-A(12): 1559-1577 (2022)- [c18]Yi Lu, Keisuke Hara, Kazuma Ohara, Jacob C. N. Schuldt, Keisuke Tanaka:
Efficient Two-Party Exponentiation from Quotient Transfer. ACNS 2022: 643-662 - [c17]Nuttapong Attrapadung, Hiraku Morita
, Kazuma Ohara, Jacob C. N. Schuldt, Kazunari Tozawa:
Memory and Round-Efficient MPC Primitives in the Pre-Processing Model from Unit Vectorization. AsiaCCS 2022: 858-872 - [c16]Nuttapong Attrapadung, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Tadanori Teruya, Kazunari Tozawa:
Secure Parallel Computation on Privately Partitioned Data and Applications. CCS 2022: 151-164 - [c15]Yohei Watanabe, Kazuma Ohara, Mitsugu Iwamoto, Kazuo Ohta:
Efficient Dynamic Searchable Encryption with Forward Privacy under the Decent Leakage. CODASPY 2022: 312-323 - 2021
- [c14]Toshinori Araki, Jun Furukawa, Kazuma Ohara, Benny Pinkas, Hanan Rosemarin, Hikaru Tsuchida:
Secure Graph Analysis at Scale. CCS 2021: 610-629 - [c13]Nuttapong Attrapadung, Goichiro Hanaoka, Takahiro Matsuda, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Tadanori Teruya, Kazunari Tozawa:
Oblivious Linear Group Actions and Applications. CCS 2021: 630-650 - [c12]Shuichi Katsumata, Takahiro Matsuda, Wataru Nakamura, Kazuma Ohara, Kenta Takahashi:
Revisiting Fuzzy Signatures: Towards a More Risk-Free Cryptographic Authentication System based on Biometrics. CCS 2021: 2046-2065 - [c11]Reo Eriguchi, Kazuma Ohara, Shota Yamada, Koji Nuida:
Non-interactive Secure Multiparty Computation for Symmetric Functions, Revisited: More Efficient Constructions and Extensions. CRYPTO (2) 2021: 305-334 - [i5]Shuichi Katsumata, Takahiro Matsuda, Wataru Nakamura, Kazuma Ohara, Kenta Takahashi:
Revisiting Fuzzy Signatures: Towards a More Risk-Free Cryptographic Authentication System based on Biometrics. CoRR abs/2112.08658 (2021) - [i4]Yohei Watanabe, Takeshi Nakai, Kazuma Ohara, Takuya Nojima, Yexuan Liu, Mitsugu Iwamoto, Kazuo Ohta:
How to Make a Secure Index for Searchable Symmetric Encryption, Revisited. IACR Cryptol. ePrint Arch. 2021: 948 (2021) - 2020
- [c10]Goichiro Hanaoka, Misaki Komatsu, Kazuma Ohara, Yusuke Sakai, Shota Yamada:
Semantic Definition of Anonymity in Identity-Based Encryption and Its Relation to Indistinguishability-Based Definition. ESORICS (2) 2020: 65-85
2010 – 2019
- 2019
- [j3]Kazuma Ohara, Yohei Watanabe, Mitsugu Iwamoto, Kazuo Ohta:
Multi-Party Computation for Modular Exponentiation Based on Replicated Secret Sharing. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 102-A(9): 1079-1090 (2019) - [j2]Kazuma Ohara, Keita Emura, Goichiro Hanaoka, Ai Ishida, Kazuo Ohta, Yusuke Sakai:
Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 102-A(9): 1101-1117 (2019) - [j1]Keita Emura, Goichiro Hanaoka, Yutaka Kawai, Takahiro Matsuda, Kazuma Ohara, Kazumasa Omote, Yusuke Sakai:
Group Signatures with Message-Dependent Opening: Formal Definitions and Constructions. Secur. Commun. Networks 2019: 4872403:1-4872403:36 (2019) - 2018
- [c9]Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Yehuda Lindell, Kazuma Ohara, Hikaru Tsuchida:
Generalizing the SPDZ Compiler For Other Protocols. CCS 2018: 880-895 - [c8]Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Kazuma Ohara, Hikaru Tsuchida:
How to Choose Suitable Secure Multiparty Computation Using Generalized SPDZ. CCS 2018: 2198-2200 - [i3]Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Yehuda Lindell, Kazuma Ohara, Hikaru Tsuchida:
Generalizing the SPDZ Compiler For Other Protocols. IACR Cryptol. ePrint Arch. 2018: 762 (2018) - 2017
- [c7]Toshinori Araki, Assi Barak, Jun Furukawa, Tamar Lichter, Yehuda Lindell, Ariel Nof, Kazuma Ohara, Adi Watzman, Or Weinstein:
Optimized Honest-Majority MPC for Malicious Adversaries - Breaking the 1 Billion-Gate Per Second Barrier. IEEE Symposium on Security and Privacy 2017: 843-862 - 2016
- [c6]Toshinori Araki, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara:
High-Throughput Semi-Honest Secure Three-Party Computation with an Honest Majority. CCS 2016: 805-817 - [c5]Toshinori Araki, Assaf Barak, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara:
DEMO: High-Throughput Secure Three-Party Computation of Kerberos Ticket Generation. CCS 2016: 1841-1843 - [i2]Kazuma Ohara, Keita Emura, Goichiro Hanaoka, Ai Ishida, Kazuo Ohta, Yusuke Sakai:
Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology. IACR Cryptol. ePrint Arch. 2016: 477 (2016) - [i1]Toshinori Araki, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara:
High-Throughput Semi-Honest Secure Three-Party Computation with an Honest Majority. IACR Cryptol. ePrint Arch. 2016: 768 (2016) - 2014
- [c4]Kazuma Ohara, Kazuo Ohta, Koutarou Suzuki, Kazuki Yoneyama:
Constant Rounds Almost Linear Complexity Multi-party Computation for Prefix Sum. AFRICACRYPT 2014: 285-299 - [c3]Kazuma Ohara, Yusuke Sakai, Fumiaki Yoshida, Mitsugu Iwamoto, Kazuo Ohta:
Privacy-preserving smart metering with verifiability for both billing and energy management. AsiaPKC@AsiaCCS 2014: 23-32 - [c2]Ryo Matsushiba, Kazuma Ohara, Takao Waho:
An energy-efficient dynamic-integrator-based ΔΣ modulator. ICECS 2014: 467-470 - 2013
- [c1]Kazuma Ohara, Yusuke Sakai, Keita Emura, Goichiro Hanaoka:
A group signature scheme with unbounded message-dependent opening. AsiaCCS 2013: 517-522
Coauthor Index
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