Yusuke Sakai

79 papers A 4B 3C 8Misc 9Journal 40Unranked 15
YearRankTypeTitle / Venue / Authors
2026 J jnl
On Key Substitution Attacks Against Aggregate Signatures and Multi-Signatures.
IEEE Access
Yuuki Fujita, Yusuke Sakai, Kyosuke Yamashita, Goichiro Hanaoka
2025 — conf
Abuse-Resistant Evaluation of AI-as-a-Service via Function-Hiding Homomorphic Signatures.
ESORICS (1)
Nuttapong Attrapadung, Goichiro Hanaoaka, Ryo Hiromasa, Yoshihiro Koseki, Takahiro Matsuda, Yutaro Nishida, Yusuke Sakai, Jacob C. N. Schuldt, Satoshi Yasuda
2025 — conf
Aggregate Signatures Tightly Secure Under Adaptive Corruptions.
ASIACRYPT (6)
Yusuke Sakai
2025 J jnl
Aggregate Signatures Tightly Secure under Adaptive Corruptions.
IACR Cryptol. ePrint Arch.
Yusuke Sakai
2025 — conf
On Key Substitution Attacks against Aggregate Signatures and Multi-Signatures.
APKC@AsiaCCS
Yuuki Fujita, Yusuke Sakai, Kyosuke Yamashita, Goichiro Hanaoka
2025 J jnl
Signatures with Tight Adaptive Corruptions from Search Assumptions.
IACR Cryptol. ePrint Arch.
Keitaro Hashimoto, Wakaha Ogata, Yusuke Sakai
2024 — conf
Anonymous Reputation Systems with Revocation, Revisited.
FC (2)
Ryuya Hayashi, Shuichi Katsumata, Yusuke Sakai
2024 J jnl
Attribute-Based Signatures for Circuits with Optimal Parameter Size from Standard Assumptions.
IACR Cryptol. ePrint Arch.
Ryuya Hayashi, Yusuke Sakai, Shota Yamada
2024 J jnl
Constraints and Evaluations on Signature Transmission Interval for Aggregate Signatures with Interactive Tracing Functionality.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryu Ishii, Kyosuke Yamashita, Zihao Song, Yusuke Sakai, Tadanori Teruya, Takahiro Matsuda, Goichiro Hanaoka, Kanta Matsuura, Tsutomu Matsumoto
2024 J jnl
More Efficient Two-Round Multi-Signature Scheme with Provably Secure Parameters for Standardized Elliptic Curves.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kaoru Takemure, Yusuke Sakai, Bagus Santoso, Goichiro Hanaoka, Kazuo Ohta
2024 J jnl
On Key Substitution Attacks against Aggregate Signatures and Multi-Signatures.
IACR Cryptol. ePrint Arch.
Yuuki Fujita, Yusuke Sakai, Kyosuke Yamashita, Goichiro Hanaoka
2024 — conf
Privacy-Preserving Verifiable CNNs.
ACNS (2)
Nuttapong Attrapadung, Goichiro Hanaoka, Ryo Hiromasa, Yoshihiro Koseki, Takahiro Matsuda, Yutaro Nishida, Yusuke Sakai, Jacob C. N. Schuldt, Satoshi Yasuda
2023 J jnl
Fault-Tolerant Aggregate Signature Schemes against Bandwidth Consumption Attack.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kyosuke Yamashita, Ryu Ishii, Yusuke Sakai, Tadanori Teruya, Takahiro Matsuda, Goichiro Hanaoka, Kanta Matsuura, Tsutomu Matsumoto
2023 J jnl
More Efficient Two-Round Multi-Signature Scheme with Provably Secure Parameters.
IACR Cryptol. ePrint Arch.
Kaoru Takemure, Yusuke Sakai, Bagus Santoso, Goichiro Hanaoka, Kazuo Ohta
2023 — conf
Practical Round-Optimal Blind Signatures in the ROM from Standard Assumptions.
ASIACRYPT (2)
Shuichi Katsumata, Michael Reichle, Yusuke Sakai
2023 J jnl
Practical Round-Optimal Blind Signatures in the ROM from Standard Assumptions.
IACR Cryptol. ePrint Arch.
Shuichi Katsumata, Michael Reichle, Yusuke Sakai
2023 — conf
Signature for Objects: Formalizing How to Authenticate Physical Data and More.
FC (1)
Ryuya Hayashi, Taiki Asano, Junichiro Hayata, Takahiro Matsuda, Shota Yamada, Shuichi Katsumata, Yusuke Sakai, Tadanori Teruya, Jacob C. N. Schuldt, Nuttapong Attrapadung, Goichiro Hanaoka, Kanta Matsuura, Tsutomu Matsumoto
2022 J jnl
Aggregate Signature Schemes with Traceability of Devices Dynamically Generating Invalid Signatures.
IEICE Trans. Inf. Syst.
Ryu Ishii, Kyosuke Yamashita, Yusuke Sakai, Tadanori Teruya, Takahiro Matsuda, Goichiro Hanaoka, Kanta Matsuura, Tsutomu Matsumoto
2022 — conf
Constraints and Evaluations on Signature Transmission Interval for Aggregate Signatures with Interactive Tracing Functionality.
ADIoT
Ryu Ishii, Kyosuke Yamashita, Zihao Song, Yusuke Sakai, Tadanori Teruya, Goichiro Hanaoka, Kanta Matsuura, Tsutomu Matsumoto
2022 Misc conf
Succinct Attribute-Based Signatures for Bounded-Size Circuits by Combining Algebraic and Arithmetic Proofs.
SCN
Yusuke Sakai
2021 J jnl
Achieving Pairing-Free Aggregate Signatures using Pre-Communication between Signers.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kaoru Takemure, Yusuke Sakai, Bagus Santoso, Goichiro Hanaoka, Kazuo Ohta
2021 — conf
Aggregate Signature with Traceability of Devices Dynamically Generating Invalid Signatures.
ACNS Workshops
Ryu Ishii, Kyosuke Yamashita, Yusuke Sakai, Takahiro Matsuda, Tadanori Teruya, Goichiro Hanaoka, Kanta Matsuura, Tsutomu Matsumoto
2021 J jnl
Equivalence between Non-Malleability against Replayable CCA and Other RCCA-Security Notions.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Junichiro Hayata, Fuyuki Kitagawa, Yusuke Sakai, Goichiro Hanaoka, Kanta Matsuura
2021 J jnl
Fully Anonymous Group Signature with Verifier-Local Revocation.
IACR Cryptol. ePrint Arch.
Ai Kitagawa, Yusuke Sakai, Keita Emura, Goichiro Hanaoka, Keisuke Tanaka
2020 J jnl
A Setup-Free Threshold Encryption Scheme for the Bitcoin Protocol and Its Applications.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Goichiro Hanaoka, Yusuke Sakai, Toshiya Shimizu, Takeshi Shimoyama, SeongHan Shin
2020 C conf
Achieving Pairing-Free Aggregate Signatures using Pre-Communication between Signers.
ProvSec
Kaoru Takemure, Yusuke Sakai, Bagus Santoso, Goichiro Hanaoka, Kazuo Ohta
2020 J jnl
Cryptanalysis of Aggregate Γ-Signature and Practical Countermeasures in Application to Bitcoin.
IACR Cryptol. ePrint Arch.
Goichiro Hanaoka, Kazuo Ohta, Yusuke Sakai, Bagus Santoso, Kaoru Takemure, Yunlei Zhao
2020 J jnl
Generic Construction of Adaptively Secure Anonymous Key-Policy Attribute-Based Encryption from Public-Key Searchable Encryption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Junichiro Hayata, Masahito Ishizaka, Yusuke Sakai, Goichiro Hanaoka, Kanta Matsuura
2020 J jnl
Practical Public-Key Encryption Scheme Tightly Secure in the Random Oracle Model.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yusuke Sakai, Goichiro Hanaoka
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
2020 J jnl
Verifiable Privacy-Preserving Data Aggregation Protocols.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Satoshi Yasuda, Yoshihiro Koseki, Yusuke Sakai, Fuyuki Kitagawa, Yutaka Kawai, Goichiro Hanaoka
2019 Misc conf
Equivalence Between Non-malleability Against Replayable CCA and Other RCCA-Security Notions.
IWSEC
Junichiro Hayata, Fuyuki Kitagawa, Yusuke Sakai, Goichiro Hanaoka, Kanta Matsuura
2019 Misc conf
Field Extension in Secret-Shared Form and Its Applications to Efficient Secure Computation.
ACISP
Ryo Kikuchi, Nuttapong Attrapadung, Koki Hamada, Dai Ikarashi, Ai Ishida, Takahiro Matsuda, Yusuke Sakai, Jacob C. N. Schuldt
2019 J jnl
Field Extension in Secret-Shared Form and Its Applications to Efficient Secure Computation.
IACR Cryptol. ePrint Arch.
Ryo Kikuchi, Nuttapong Attrapadung, Koki Hamada, Dai Ikarashi, Ai Ishida, Takahiro Matsuda, Yusuke Sakai, Jacob C. N. Schuldt
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 A conf
Proper Usage of the Group Signature Scheme in ISO/IEC 20008-2.
AsiaCCS
Ai Ishida, Yusuke Sakai, Keita Emura, Goichiro Hanaoka, Keisuke Tanaka
2019 J jnl
Proper Usage of the Group Signature Scheme in ISO/IEC 20008-2.
IACR Cryptol. ePrint Arch.
Ai Ishida, Yusuke Sakai, Keita Emura, Goichiro Hanaoka, Keisuke Tanaka
2019 — conf
Recent Advances in Attribute-Based Signatures.
APKC@AsiaCCS
Yusuke Sakai
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 C conf
A Consideration on the Transformation from Deniable Group Signature to Disavowable PKENO.
ISITA
Ai Ishida, Yusuke Sakai, Goichiro Hanaoka
2018 C conf
A Remark on an Identity-Based Encryption Scheme with Non-interactive Opening.
ISITA
Yusuke Sakai, Goichiro Hanaoka
2018 — conf
Attribute-Based Signatures for Unbounded Languages from Standard Assumptions.
ASIACRYPT (2)
Yusuke Sakai, Shuichi Katsumata, Nuttapong Attrapadung, Goichiro Hanaoka
2018 J jnl
Attribute-Based Signatures for Unbounded Languages from Standard Assumptions.
IACR Cryptol. ePrint Arch.
Yusuke Sakai, Shuichi Katsumata, Nuttapong Attrapadung, Goichiro Hanaoka
2018 A conf
Efficient Two-level Homomorphic Encryption in Prime-order Bilinear Groups and A Fast Implementation in WebAssembly.
AsiaCCS
Nuttapong Attrapadung, Goichiro Hanaoka, Shigeo Mitsunari, Yusuke Sakai, Kana Shimizu, Tadanori Teruya
2018 C conf
Formal Treatment of Verifiable Privacy-Preserving Data-Aggregation Protocols.
ProvSec
Satoshi Yasuda, Yoshihiro Koseki, Yusuke Sakai, Fuyuki Kitagawa, Yutaka Kawai, Goichiro Hanaoka
2018 Misc conf
Fully Anonymous Group Signature with Verifier-Local Revocation.
SCN
Ai Ishida, Yusuke Sakai, Keita Emura, Goichiro Hanaoka, Keisuke Tanaka
2018 C conf
Generic Construction of Adaptively Secure Anonymous Key-Policy Attribute-Based Encryption from Public-Key Searchable Encryption.
ISITA
Junichiro Hayata, Masahito Ishizaka, Yusuke Sakai, Goichiro Hanaoka, Kanta Matsuura
2018 J jnl
Practical attribute-based signature schemes for circuits from bilinear map.
IET Inf. Secur.
Yusuke Sakai, Nuttapong Attrapadung, Goichiro Hanaoka
2018 J jnl
Tag-KEM/DEM Framework for Public-Key Encryption with Non-Interactive Opening.
IEICE Trans. Inf. Syst.
Yusuke Sakai, Takahiro Matsuda, Goichiro Hanaoka
2017 J jnl
A privacy-enhanced access log management mechanism in SSO systems from nominative signatures.
Int. J. Appl. Cryptogr.
Sanami Nakagawa, Takashi Nishide, Eiji Okamoto, Keita Emura, Goichiro Hanaoka, Yusuke Sakai, Akihisa Kodate
2017 J jnl
Group Signature with Deniability: How to Disavow a Signature.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ai Ishida, Keita Emura, Goichiro Hanaoka, Yusuke Sakai, Keisuke Tanaka
2016 — conf
Attribute-Based Signatures for Circuits from Bilinear Map.
Public Key Cryptography (1)
Yusuke Sakai, Nuttapong Attrapadung, Goichiro Hanaoka
2016 J jnl
Attribute-Based Signatures for Circuits from Bilinear Map.
IACR Cryptol. ePrint Arch.
Yusuke Sakai, Nuttapong Attrapadung, Goichiro Hanaoka
2016 J jnl
Constructions of dynamic and non-dynamic threshold public-key encryption schemes with decryption consistency.
Theor. Comput. Sci.
Yusuke Sakai, Keita Emura, Jacob C. N. Schuldt, Goichiro Hanaoka, Kazuo Ohta
2016 B conf
Group Signature with Deniability: How to Disavow a Signature.
CANS
Ai Ishida, Keita Emura, Goichiro Hanaoka, Yusuke Sakai, Keisuke Tanaka
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
2016 Misc conf
Simple, Secure, and Efficient Searchable Symmetric Encryption with Multiple Encrypted Indexes.
IWSEC
Takato Hirano, Mitsuhiro Hattori, Yutaka Kawai, Nori Matsuda, Mitsugu Iwamoto, Kazuo Ohta, Yusuke Sakai, Tatsuji Munaka
2016 C conf
Tag-KEM/DEM framework for public-key encryption with non-interactive opening.
ISITA
Yusuke Sakai, Takahiro Matsuda, Goichiro Hanaoka
2015 J jnl
Disavowable Public Key Encryption with Non-Interactive Opening.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ai Ishida, Keita Emura, Goichiro Hanaoka, Yusuke Sakai, Keisuke Tanaka
2015 A conf
Disavowable Public Key Encryption with Non-interactive Opening.
AsiaCCS
Ai Ishida, Keita Emura, Goichiro Hanaoka, Yusuke Sakai, Keisuke Tanaka
2015 Misc conf
Dynamic Threshold Public-Key Encryption with Decryption Consistency from Static Assumptions.
ACISP
Yusuke Sakai, Keita Emura, Jacob C. N. Schuldt, Goichiro Hanaoka, Kazuo Ohta
2015 J jnl
Group Signature with Deniability: How to Disavow a Signature.
IACR Cryptol. ePrint Arch.
Ai Ishida, Keita Emura, Goichiro Hanaoka, Yusuke Sakai, Keisuke Tanaka
2015 J jnl
Revocable Group Signature with Constant-Size Revocation List.
Comput. J.
Nuttapong Attrapadung, Keita Emura, Goichiro Hanaoka, Yusuke Sakai
2014 B conf
A Privacy-Enhanced Access Log Management Mechanism in SSO Systems from Nominative Signatures.
TrustCom
Sanami Nakagawa, Keita Emura, Goichiro Hanaoka, Akihisa Kodate, Takashi Nishide, Eiji Okamoto, Yusuke Sakai
2014 B conf
A Revocable Group Signature Scheme from Identity-Based Revocation Techniques: Achieving Constant-Size Revocation List.
ACNS
Nuttapong Attrapadung, Keita Emura, Goichiro Hanaoka, Yusuke Sakai
2014 J jnl
Group signature implies public-key encryption with non-interactive opening.
Int. J. Inf. Sec.
Keita Emura, Goichiro Hanaoka, Yusuke Sakai, Jacob C. N. Schuldt
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
2013 J jnl
Ciphertext-Policy Delegatable Hidden Vector Encryption and Its Application.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Mitsuhiro Hattori, Takato Hirano, Takashi Ito, Nori Matsuda, Takumi Mori, Yusuke Sakai, Kazuo Ohta
2013 J jnl
Methods for Restricting Message Space in Public-Key Encryption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yusuke Sakai, Keita Emura, Goichiro Hanaoka, Yutaka Kawai, Kazumasa Omote
2012 C conf
Group Signatures with Message-Dependent Opening.
Pairing
Yusuke Sakai, Keita Emura, Goichiro Hanaoka, Yutaka Kawai, Takahiro Matsuda, Kazumasa Omote
2012 — conf
On the Security of Dynamic Group Signatures: Preventing Signature Hijacking.
Public Key Cryptography
Yusuke Sakai, Jacob C. N. Schuldt, Keita Emura, Goichiro Hanaoka, Kazuo Ohta
2012 J jnl
On the Security of Dynamic Group Signatures: Preventing Signature Hijacking.
IACR Cryptol. ePrint Arch.
Yusuke Sakai, Jacob C. N. Schuldt, Keita Emura, Goichiro Hanaoka, Kazuo Ohta
2011 C conf
Ciphertext-Policy Delegatable Hidden Vector Encryption and Its Application to Searchable Encryption in Multi-user Setting.
IMACC
Mitsuhiro Hattori, Takato Hirano, Takashi Ito, Nori Matsuda, Takumi Mori, Yusuke Sakai, Kazuo Ohta
2011 J jnl
How to Shorten a Ciphertext of Reproducible Key Encapsulation Mechanisms in the Random Oracle Model.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yusuke Sakai, Goichiro Hanaoka, Kaoru Kurosawa, Kazuo Ohta
2011 J jnl
On the (Im)possibility Results for Strong Attack Models for Public Key Cryptsystems.
J. Internet Serv. Inf. Secur.
Yutaka Kawai, Yusuke Sakai, Noboru Kunihiro
2011 Misc conf
Towards Restricting Plaintext Space in Public Key Encryption.
IWSEC
Yusuke Sakai, Keita Emura, Goichiro Hanaoka, Yutaka Kawai, Kazumasa Omote
2010 Misc conf
A Generic Method for Reducing Ciphertext Length of Reproducible KEMs in the RO Model.
IWSEC
Yusuke Sakai, Goichiro Hanaoka, Kaoru Kurosawa, Kazuo Ohta
2010 Misc conf
Group Signature Implies PKE with Non-interactive Opening and Threshold PKE.
IWSEC
Keita Emura, Goichiro Hanaoka, Yusuke Sakai