Keisuke Hara

59 papers A* 1A 1B 2C 8Misc 4Journal 31Unranked 10
YearRankTypeTitle / Venue / Authors
2025 J jnl
A linkable ring signature scheme with unconditional anonymity in the standard model.
Theor. Comput. Sci.
Keisuke Hara
2025 C conf
Claimable Multi-designated Verifier Signature.
ProvSec
Yuuki Fujita, Keisuke Hara, Kyosuke Yamashita
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
2025 A conf
Foundations of Multi-Designated Verifier Signature Comprehensive Formalization and New Constructions in Subset Simulation.
CSF
Keitaro Hashimoto, Kyosuke Yamashita, Keisuke Hara
2025 J jnl
Foundations of Multi-Designated Verifier Signature: Comprehensive Formalization and New Constructions in Subset Simulation.
IACR Cryptol. ePrint Arch.
Keitaro Hashimoto, Kyosuke Yamashita, Keisuke Hara
2025 — conf
Hierarchical Identity-Based Matchmaking Encryption.
ACNS Workshops (3)
Sohto Chiku, Keisuke Hara, Junji Shikata
2025 J jnl
Homomorphic Signature With Designated Evaluator.
IEEE Access
Kazuma Shiraishi, Keisuke Hara, Toi Tomita, Kyosuke Yamashita, Junji Shikata
2025 — conf
Key Revocation in Registered Attribute-Based Encryption.
PKC (3)
Kyoichi Asano, Nuttapong Attrapadung, Keisuke Hara, Keitaro Hashimoto, Yohei Watanabe
2025 C conf
Logarithmic-Size Ring Signatures with Tight Security from the DL Assumption.
ProvSec
Keisuke Hara, Masayuki Tezuka
2025 J jnl
Multi-Query Verifiable PIR and Its Application.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryuya Hayashi, Junichiro Hayata, Keisuke Hara, Kenta Nomura, Masaki Kamizono, Goichiro Hanaoka
2025 Misc conf
Multi-designated Verifier Ring Signature: Generic Construction from Standard Primitives.
IWSEC
Yuuki Fujita, Keisuke Hara, Keitaro Hashimoto, Kyosuke Yamashita
2025 J jnl
On Multi-Key FuncCPA Secure Encryption Schemes.
IACR Cryptol. ePrint Arch.
Eri Nakajima, Keisuke Hara, Kyosuke Yamashita
2025 — conf
Practical Quantum Public Key Encryption from One-way Functions.
APKC@AsiaCCS
Kyohei Sudo, Keisuke Fujii, Keisuke Hara, Kosuke Ito, Masayuki Tezuka, Yusuke Yoshida
2025 J jnl
Quantum Search-to-Decision Reduction for the LWE Problem.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kyohei Sudo, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida
2024 J jnl
A logarithmic-sized accountable ring signature scheme in the standard model.
Theor. Comput. Sci.
Keisuke Hara
2024 J jnl
Chosen Ciphertext Security for (Hierarchical) Identity-Based Matchmaking Encryption.
IACR Cryptol. ePrint Arch.
Sohto Chiku, Keisuke Hara, Junji Shikata
2024 J jnl
Designated Verifier Signature with Claimability.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kyosuke Yamashita, Keisuke Hara, Yohei Watanabe, Naoto Yanai, Junji Shikata
2024 — conf
Designated Verifier Signature with Repudiability.
APKC@AsiaCCS
Takumi Matsuura, Keisuke Hara, Kyosuke Yamashita
2024 B conf
How to Accomplish Key and Communication Compression Over Authentication Channels - Proxy Re-authentication and Its Instantiations.
NSS
Yoshiro Matsuoka, Sohto Chiku, Keisuke Hara, Junji Shikata
2024 — conf
How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption.
CANS (2)
Sohto Chiku, Keisuke Hara, Keitaro Hashimoto, Toi Tomita, Junji Shikata
2024 — conf
Multi-query Verifiable PIR and Its Application.
CANS (2)
Ryuya Hayashi, Junichiro Hayata, Keisuke Hara, Kenta Nomura, Masaki Kamizono, Goichiro Hanaoka
2024 J jnl
On the Black-Box impossibility of multi-designated verifiers signature schemes from ring signature schemes.
J. Math. Cryptol.
Kyosuke Yamashita, Keisuke Hara
2024 — ed.
Proceedings of the 11th ACM Asia Public-Key Cryptography Workshop, APKC 2024, Singapore, July 1-5, 2024
APKC@AsiaCCS
Keisuke Hara, Daiki Miyahara
2023 C conf
Chosen Ciphertext Security for Blind Identity-Based Encryption with Certified Identities.
ISPEC
Sohto Chiku, Keisuke Hara, Junji Shikata
2023 — conf
Designated Verifier Signature with Claimability.
APKC@AsiaCCS
Kyosuke Yamashita, Keisuke Hara, Yohei Watanabe, Naoto Yanai, Junji Shikata
2023 J jnl
Forward Secure Message Franking with Updatable Reporting Tags.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Hiroki Yamamuro, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
2023 C conf
Identity-Based Matchmaking Encryption Secure Against Key Generation Center.
ProvSec
Sohto Chiku, Keisuke Hara, Junji Shikata
2023 J jnl
Identity-Based Matchmaking Encryption, Revisited: Strong Security and Practical Constructions from Standard Classical and Post-Quantum Assumptions.
IACR Cryptol. ePrint Arch.
Sohto Chiku, Keitaro Hashimoto, Keisuke Hara, Junji Shikata
2023 J jnl
On the Black-Box Impossibility of Multi-Designated Verifiers Signature Schemes from Ring Signature Schemes.
IACR Cryptol. ePrint Arch.
Kyosuke Yamashita, Keisuke Hara
2023 J jnl
On the Black-Box Separation Between Ring Signatures and Public Key Encryptions.
IACR Cryptol. ePrint Arch.
Kyosuke Yamashita, Keisuke Hara
2023 — conf
Quantum Search-to-Decision Reduction for the LWE Problem.
AFRICACRYPT
Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida
2023 J jnl
Quantum Search-to-Decision Reduction for the LWE Problem.
IACR Cryptol. ePrint Arch.
Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida
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
Generic transformation from broadcast encryption to round-optimal deniable ring authentication.
Des. Codes Cryptogr.
Keisuke Hara, Takahiro Matsuda, Goichiro Hanaoka, Keisuke Tanaka
2022 J jnl
Multikey Verifiable Homomorphic Encryption.
IEEE Access
Yi Lu, Keisuke Hara, Keisuke Tanaka
2022 J jnl
Receiver Selective Opening Chosen Ciphertext Secure Identity-Based Encryption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Keisuke Hara, Takahiro Matsuda, Keisuke Tanaka
2022 J jnl
Surface Texturing Technique Based on Ultrasonic Turning for Improving Tribological Properties.
Int. J. Autom. Technol.
Keisuke Hara, Toshihiro Fukuda, Kyosuke Taguchi, Hiromi Isobe
2021 J jnl
Effect of Vibration Direction of Ultrasonic Vibrating Cutting Edge on Internal Stress Fluctuation of Workpiece.
Int. J. Autom. Technol.
Hiromi Isobe, Masatoshi Okuda, Keisuke Hara, Jun Ishimatsu
2021 Misc conf
Forward Secure Message Franking.
ICISC
Hiroki Yamamuro, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
2021 J jnl
Improvement of Removal Rate of Tape Lapping by Applying Fluid with Ultrasonic Excited Cavitation.
Int. J. Autom. Technol.
Hiromi Isobe, Soutarou Tsuji, Keisuke Hara, Jun Ishimatsu
2021 J jnl
Receiver Selective Opening CCA Secure Public Key Encryption from Various Assumptions.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yi Lu, Keisuke Hara, Keisuke Tanaka
2021 — conf
Receiver Selective Opening Chosen Ciphertext Secure Identity-Based Encryption.
APKC@AsiaCCS
Keisuke Hara, Takahiro Matsuda, Keisuke Tanaka
2021 J jnl
Ring Signature With Unconditional Anonymity in the Plain Model.
IEEE Access
Keisuke Hara, Keisuke Tanaka
2021 J jnl
Tightly secure ring signatures in the standard model.
Theor. Comput. Sci.
Keisuke Hara, Keisuke Tanaka
2021 J jnl
Watermarkable Signature with Computational Function Preserving.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kyohei Sudo, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
2020 C conf
Receiver Selective Opening CCA Secure Public Key Encryption from Various Assumptions.
ProvSec
Yi Lu, Keisuke Hara, Keisuke Tanaka
2020 Misc conf
Security Definitions on Time-Lock Puzzles.
ICISC
Daiki Hiraga, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
2020 C conf
Watermarkable Signature with Computational Function Preserving.
ProvSec
Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida, Keisuke Tanaka
2019 J jnl
Simulation-based receiver selective opening CCA secure PKE from standard computational assumptions.
Theor. Comput. Sci.
Keisuke Hara, Fuyuki Kitagawa, Takahiro Matsuda, Goichiro Hanaoka, Keisuke Tanaka
2019 J jnl
Visualization of Stress Distribution by Photoelastic Method Under Ultrasonic Grinding Condition.
Int. J. Autom. Technol.
Hiromi Isobe, Natsuki Sasada, Keisuke Hara, Jun Ishimatsu
2018 Misc conf
Simulation-Based Receiver Selective Opening CCA Secure PKE from Standard Computational Assumptions.
SCN
Keisuke Hara, Fuyuki Kitagawa, Takahiro Matsuda, Goichiro Hanaoka, Keisuke Tanaka
2018 J jnl
Simulation-based Receiver Selective Opening CCA Secure PKE from Standard Computational Assumptions.
IACR Cryptol. ePrint Arch.
Keisuke Hara, Fuyuki Kitagawa, Takahiro Matsuda, Goichiro Hanaoka, Keisuke Tanaka
2016 J jnl
A Scoring Rule-based Truthful Demand Response Mechanism.
Int. J. Networked Distributed Comput.
Keisuke Hara, Takayuki Ito
2015 C conf
A scoring rule-based truthful demand response mechanism.
ICIS
Keisuke Hara, Takayuki Ito
2015 — ch.
Effects of GA Based Mediation Protocol for Utilities that Change Over Time.
Next Frontier in Agent-Based Complex Automated Negotiation
Keisuke Hara, Takayuki Ito
2013 A* conf
A Mediation Mechanism for Automated Negotiating Agents Whose Utility Changes over Time.
AAAI
Keisuke Hara, Takayuki Ito
2013 C conf
A Mediator-Based Agent Negotiation Protocol for Utilities That Change with Time.
IEA/AIE
Keisuke Hara, Mikoto Okumura, Takayuki Ito
2013 J jnl
A two-step model and the algorithm for recalling in recommender systems.
CoRR
Keisuke Hara, Tomihisa Kamada
2013 — conf
Incentive based smart pricing scheme using scoring rule.
ISGT Europe
Shantanu Chakraborty, Takayuki Ito, Keisuke Hara