Kazuma Ohara

According to our database, Kazuma Ohara authored at least 22 papers between 2013 and 2022.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2022

How to Make a Secure Index for Searchable Symmetric Encryption, Revisited.

Yohei Watanabe, Takeshi Nakai, Kazuma Ohara, Takuya Nojima, Yexuan Liu, Mitsugu Iwamoto, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., December, 2022

Efficient Dynamic Searchable Encryption with Forward Privacy under the Decent Leakage.

Yohei Watanabe, Kazuma Ohara, Mitsugu Iwamoto, Kazuo Ohta

Proceedings of the CODASPY '22: Twelveth ACM Conference on Data and Application Security and Privacy, Baltimore, MD, USA, April 24, 2022

Secure Parallel Computation on Privately Partitioned Data and Applications.

Nuttapong Attrapadung, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Tadanori Teruya, Kazunari Tozawa

Proceedings of the 2022 ACM SIGSAC Conference on Computer and Communications Security, 2022

Memory and Round-Efficient MPC Primitives in the Pre-Processing Model from Unit Vectorization.

Nuttapong Attrapadung, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Kazunari Tozawa

Proceedings of the ASIA CCS '22: ACM Asia Conference on Computer and Communications Security, Nagasaki, Japan, 30 May 2022, 2022

Efficient Two-Party Exponentiation from Quotient Transfer.

Yi Lu, Keisuke Hara, Kazuma Ohara, Jacob C. N. Schuldt, Keisuke Tanaka

Proceedings of the Applied Cryptography and Network Security, 2022

2021

Non-interactive Secure Multiparty Computation for Symmetric Functions, Revisited: More Efficient Constructions and Extensions.

Reo Eriguchi, Kazuma Ohara, Shota Yamada, Koji Nuida

Proceedings of the Advances in Cryptology - CRYPTO 2021, 2021

Revisiting Fuzzy Signatures: Towards a More Risk-Free Cryptographic Authentication System based on Biometrics.

Shuichi Katsumata, Takahiro Matsuda, Wataru Nakamura, Kazuma Ohara, Kenta Takahashi

Proceedings of the CCS '21: 2021 ACM SIGSAC Conference on Computer and Communications Security, Virtual Event, Republic of Korea, November 15, 2021

Oblivious Linear Group Actions and Applications.

Nuttapong Attrapadung, Goichiro Hanaoka, Takahiro Matsuda, Hiraku Morita, Kazuma Ohara, Jacob C. N. Schuldt, Tadanori Teruya, Kazunari Tozawa

Proceedings of the CCS '21: 2021 ACM SIGSAC Conference on Computer and Communications Security, Virtual Event, Republic of Korea, November 15, 2021

Secure Graph Analysis at Scale.

Toshinori Araki, Jun Furukawa, Kazuma Ohara, Benny Pinkas, Hanan Rosemarin, Hikaru Tsuchida

Proceedings of the CCS '21: 2021 ACM SIGSAC Conference on Computer and Communications Security, Virtual Event, Republic of Korea, November 15, 2021

2020

Semantic Definition of Anonymity in Identity-Based Encryption and Its Relation to Indistinguishability-Based Definition.

Goichiro Hanaoka, Misaki Komatsu, Kazuma Ohara, Yusuke Sakai, Shota Yamada

Proceedings of the Computer Security - ESORICS 2020, 2020

2019

Group Signatures with Message-Dependent Opening: Formal Definitions and Constructions.

Keita Emura, Goichiro Hanaoka, Yutaka Kawai, Takahiro Matsuda, Kazuma Ohara, Kazumasa Omote, Yusuke Sakai

Secur. Commun. Networks, 2019

Multi-Party Computation for Modular Exponentiation Based on Replicated Secret Sharing.

Kazuma Ohara, Yohei Watanabe, Mitsugu Iwamoto, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology.

Kazuma Ohara, Keita Emura, Goichiro Hanaoka, Ai Ishida, Kazuo Ohta, Yusuke Sakai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

2018

Generalizing the SPDZ Compiler For Other Protocols.

Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Yehuda Lindell, Kazuma Ohara, Hikaru Tsuchida

IACR Cryptol. ePrint Arch., 2018

How to Choose Suitable Secure Multiparty Computation Using Generalized SPDZ.

Toshinori Araki, Assi Barak, Jun Furukawa, Marcel Keller, Kazuma Ohara, Hikaru Tsuchida

Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security, 2018

2017

Optimized Honest-Majority MPC for Malicious Adversaries - Breaking the 1 Billion-Gate Per Second Barrier.

Toshinori Araki, Assi Barak, Jun Furukawa, Tamar Lichter, Yehuda Lindell, Ariel Nof, Kazuma Ohara, Adi Watzman, Or Weinstein

Proceedings of the 2017 IEEE Symposium on Security and Privacy, 2017

2016

High-Throughput Semi-Honest Secure Three-Party Computation with an Honest Majority.

Toshinori Araki, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara

IACR Cryptol. ePrint Arch., 2016

DEMO: High-Throughput Secure Three-Party Computation of Kerberos Ticket Generation.

Toshinori Araki, Assaf Barak, Jun Furukawa, Yehuda Lindell, Ariel Nof, Kazuma Ohara

Proceedings of the 2016 ACM SIGSAC Conference on Computer and Communications Security, 2016

2014

An energy-efficient dynamic-integrator-based ΔΣ modulator.

Ryo Matsushiba, Kazuma Ohara, Takao Waho

Proceedings of the 21st IEEE International Conference on Electronics, Circuits and Systems, 2014

Privacy-preserving smart metering with verifiability for both billing and energy management.

Kazuma Ohara, Yusuke Sakai, Fumiaki Yoshida, Mitsugu Iwamoto, Kazuo Ohta

Proceedings of the ASIAPKC'14, 2014

Constant Rounds Almost Linear Complexity Multi-party Computation for Prefix Sum.

Kazuma Ohara, Kazuo Ohta, Koutarou Suzuki, Kazuki Yoneyama

Proceedings of the Progress in Cryptology - AFRICACRYPT 2014, 2014

2013

A group signature scheme with unbounded message-dependent opening.

Kazuma Ohara, Yusuke Sakai, Keita Emura, Goichiro Hanaoka

Proceedings of the 8th ACM Symposium on Information, Computer and Communications Security, 2013