Group Signature Implies PKE with Non-interactive Opening and Threshold PKE. - Keita Emura; Goichiro Hanaoka; Yusuke Sakai 001 (IWSEC, 2010)

A Generic Method for Reducing Ciphertext Length of Reproducible KEMs in the RO Model. - Yusuke Sakai 001; Goichiro Hanaoka; Kaoru Kurosawa; Kazuo Ohta (IWSEC, 2010)

Ciphertext-Policy Delegatable Hidden Vector Encryption and Its Application to Searchable Encryption in Multi-user Setting. - Mitsuhiro Hattori; Takato Hirano; Takashi Ito; Nori Matsuda; Takumi Mori; Yusuke Sakai 001; Kazuo Ohta (IMACC, 2011)

Towards Restricting Plaintext Space in Public Key Encryption. - Yusuke Sakai 001; Keita Emura; Goichiro Hanaoka; Yutaka Kawai; Kazumasa Omote (IWSEC, 2011)

How to Shorten a Ciphertext of Reproducible Key Encapsulation Mechanisms in the Random Oracle Model. - Yusuke Sakai 001; Goichiro Hanaoka; Kaoru Kurosawa; Kazuo Ohta (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

On the (Im)possibility Results for Strong Attack Models for Public Key Cryptsystems. - Yutaka Kawai; Yusuke Sakai 001; Noboru Kunihiro (J. Internet Serv. Inf. Secur., 2011)

Group Signatures with Message-Dependent Opening. - Yusuke Sakai 001; Keita Emura; Goichiro Hanaoka; Yutaka Kawai; Takahiro Matsuda 002; Kazumasa Omote (Pairing, 2012)

On the Security of Dynamic Group Signatures: Preventing Signature Hijacking. - Yusuke Sakai 001; Jacob C. N. Schuldt; Keita Emura; Goichiro Hanaoka; Kazuo Ohta (IACR Cryptol. ePrint Arch., 2012)

A group signature scheme with unbounded message-dependent opening. - Kazuma Ohara; Yusuke Sakai 001; Keita Emura; Goichiro Hanaoka (AsiaCCS, 2013)

Ciphertext-Policy Delegatable Hidden Vector Encryption and Its Application. - Mitsuhiro Hattori; Takato Hirano; Takashi Ito; Nori Matsuda; Takumi Mori; Yusuke Sakai 001; Kazuo Ohta (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Methods for Restricting Message Space in Public-Key Encryption. - Yusuke Sakai 001; Keita Emura; Goichiro Hanaoka; Yutaka Kawai; Kazumasa Omote (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

A Revocable Group Signature Scheme from Identity-Based Revocation Techniques: Achieving Constant-Size Revocation List. - Nuttapong Attrapadung; Keita Emura; Goichiro Hanaoka; Yusuke Sakai 001 (ACNS, 2014)

Privacy-preserving smart metering with verifiability for both billing and energy management. - Kazuma Ohara; Yusuke Sakai 001; Fumiaki Yoshida; Mitsugu Iwamoto; Kazuo Ohta (AsiaPKC@AsiaCCS, 2014)

Group signature implies public-key encryption with non-interactive opening. - Keita Emura; Goichiro Hanaoka; Yusuke Sakai 001; Jacob C. N. Schuldt (Int. J. Inf. Sec., 2014)

Dynamic Threshold Public-Key Encryption with Decryption Consistency from Static Assumptions. - Yusuke Sakai 001; Keita Emura; Jacob C. N. Schuldt; Goichiro Hanaoka; Kazuo Ohta (ACISP, 2015)

Revocable Group Signature with Constant-Size Revocation List. - Nuttapong Attrapadung; Keita Emura; Goichiro Hanaoka; Yusuke Sakai 001 (Comput. J., 2015)

Disavowable Public Key Encryption with Non-Interactive Opening. - Ai Ishida; Keita Emura; Goichiro Hanaoka; Yusuke Sakai 001; Keisuke Tanaka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Simple, Secure, and Efficient Searchable Symmetric Encryption with Multiple Encrypted Indexes. - Takato Hirano; Mitsuhiro Hattori; Yutaka Kawai; Nori Matsuda; Mitsugu Iwamoto; Kazuo Ohta; Yusuke Sakai 001; Tatsuji Munaka (IWSEC, 2016)

Attribute-Based Signatures for Circuits from Bilinear Map. - Yusuke Sakai 001; Nuttapong Attrapadung; Goichiro Hanaoka (IACR Cryptol. ePrint Arch., 2016)

Constructions of dynamic and non-dynamic threshold public-key encryption schemes with decryption consistency. - Yusuke Sakai 001; Keita Emura; Jacob C. N. Schuldt; Goichiro Hanaoka; Kazuo Ohta (Theor. Comput. Sci., 2016)

Group Signature with Deniability: How to Disavow a Signature. - Ai Ishida; Keita Emura; Goichiro Hanaoka; Yusuke Sakai 001; Keisuke Tanaka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017)

A privacy-enhanced access log management mechanism in SSO systems from nominative signatures. - Sanami Nakagawa; Takashi Nishide; Eiji Okamoto; Keita Emura; Goichiro Hanaoka; Yusuke Sakai 001; Akihisa Kodate (Int. J. Appl. Cryptogr., 2017)

Efficient Two-level Homomorphic Encryption in Prime-order Bilinear Groups and A Fast Implementation in WebAssembly. - Nuttapong Attrapadung; Goichiro Hanaoka; Shigeo Mitsunari; Yusuke Sakai 001; Kana Shimizu; Tadanori Teruya (AsiaCCS, 2018)

A Remark on an Identity-Based Encryption Scheme with Non-interactive Opening. - Yusuke Sakai 001; Goichiro Hanaoka (ISITA, 2018)

A Consideration on the Transformation from Deniable Group Signature to Disavowable PKENO. - Ai Ishida; Yusuke Sakai 001; Goichiro Hanaoka (ISITA, 2018)

Formal Treatment of Verifiable Privacy-Preserving Data-Aggregation Protocols. - Satoshi Yasuda; Yoshihiro Koseki; Yusuke Sakai 001; Fuyuki Kitagawa; Yutaka Kawai; Goichiro Hanaoka (ProvSec, 2018)

Fully Anonymous Group Signature with Verifier-Local Revocation. - Ai Ishida; Yusuke Sakai 001; Keita Emura; Goichiro Hanaoka; Keisuke Tanaka (SCN, 2018)

Attribute-Based Signatures for Unbounded Languages from Standard Assumptions. - Yusuke Sakai 001; Shuichi Katsumata; Nuttapong Attrapadung; Goichiro Hanaoka (IACR Cryptol. ePrint Arch., 2018)

Tag-KEM/DEM Framework for Public-Key Encryption with Non-Interactive Opening. - Yusuke Sakai 001; Takahiro Matsuda 002; Goichiro Hanaoka (IEICE Trans. Inf. Syst., 2018)

Practical attribute-based signature schemes for circuits from bilinear map. - Yusuke Sakai 001; Nuttapong Attrapadung; Goichiro Hanaoka (IET Inf. Secur., 2018)

Recent Advances in Attribute-Based Signatures. - Yusuke Sakai 001 (APKC@AsiaCCS, 2019)

Proper Usage of the Group Signature Scheme in ISO/IEC 20008-2. - Ai Ishida; Yusuke Sakai 001; Keita Emura; Goichiro Hanaoka; Keisuke Tanaka (IACR Cryptol. ePrint Arch., 2019)

Field Extension in Secret-Shared Form and Its Applications to Efficient Secure Computation. - Ryo Kikuchi; Nuttapong Attrapadung; Koki Hamada; Dai Ikarashi; Ai Ishida; Takahiro Matsuda 002; Yusuke Sakai 001; Jacob C. N. Schuldt (IACR Cryptol. ePrint Arch., 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 001 (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)

Group Signatures with Message-Dependent Opening: Formal Definitions and Constructions. - Keita Emura; Goichiro Hanaoka; Yutaka Kawai; Takahiro Matsuda 002; Kazuma Ohara; Kazumasa Omote; Yusuke Sakai 001 (Secur. Commun. Networks, 2019)

Semantic Definition of Anonymity in Identity-Based Encryption and Its Relation to Indistinguishability-Based Definition. - Goichiro Hanaoka; Misaki Komatsu; Kazuma Ohara; Yusuke Sakai 001; Shota Yamada 001 (ESORICS (2), 2020)

Cryptanalysis of Aggregate Γ-Signature and Practical Countermeasures in Application to Bitcoin. - Goichiro Hanaoka; Kazuo Ohta; Yusuke Sakai 001; Bagus Santoso; Kaoru Takemure; Yunlei Zhao (IACR Cryptol. ePrint Arch., 2020)

A Setup-Free Threshold Encryption Scheme for the Bitcoin Protocol and Its Applications. - Goichiro Hanaoka; Yusuke Sakai 001; Toshiya Shimizu; Takeshi Shimoyama; SeongHan Shin (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Generic Construction of Adaptively Secure Anonymous Key-Policy Attribute-Based Encryption from Public-Key Searchable Encryption. - Junichiro Hayata; Masahito Ishizaka; Yusuke Sakai 001; Goichiro Hanaoka; Kanta Matsuura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Practical Public-Key Encryption Scheme Tightly Secure in the Random Oracle Model. - Yusuke Sakai 001; Goichiro Hanaoka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Verifiable Privacy-Preserving Data Aggregation Protocols. - Satoshi Yasuda; Yoshihiro Koseki; Yusuke Sakai 001; Fuyuki Kitagawa; Yutaka Kawai; Goichiro Hanaoka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Aggregate Signature with Traceability of Devices Dynamically Generating Invalid Signatures. - Ryu Ishii; Kyosuke Yamashita; Yusuke Sakai 001; Takahiro Matsuda 002; Tadanori Teruya; Goichiro Hanaoka; Kanta Matsuura; Tsutomu Matsumoto (ACNS Workshops, 2021)

Fully Anonymous Group Signature with Verifier-Local Revocation. - Ai Kitagawa; Yusuke Sakai 001; Keita Emura; Goichiro Hanaoka; Keisuke Tanaka (IACR Cryptol. ePrint Arch., 2021)

Equivalence between Non-Malleability against Replayable CCA and Other RCCA-Security Notions. - Junichiro Hayata; Fuyuki Kitagawa; Yusuke Sakai 001; Goichiro Hanaoka; Kanta Matsuura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Achieving Pairing-Free Aggregate Signatures using Pre-Communication between Signers. - Kaoru Takemure; Yusuke Sakai 001; Bagus Santoso; Goichiro Hanaoka; Kazuo Ohta (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Constraints and Evaluations on Signature Transmission Interval for Aggregate Signatures with Interactive Tracing Functionality. - Ryu Ishii; Kyosuke Yamashita; Zihao Song; Yusuke Sakai 001; Tadanori Teruya; Goichiro Hanaoka; Kanta Matsuura; Tsutomu Matsumoto (ADIoT, 2022)

Succinct Attribute-Based Signatures for Bounded-Size Circuits by Combining Algebraic and Arithmetic Proofs. - Yusuke Sakai 001 (SCN, 2022)

Aggregate Signature Schemes with Traceability of Devices Dynamically Generating Invalid Signatures. - Ryu Ishii; Kyosuke Yamashita; Yusuke Sakai 001; Tadanori Teruya; Takahiro Matsuda 002; Goichiro Hanaoka; Kanta Matsuura; Tsutomu Matsumoto (IEICE Trans. Inf. Syst., 2022)

Signature for Objects: Formalizing How to Authenticate Physical Data and More. - Ryuya Hayashi; Taiki Asano; Junichiro Hayata; Takahiro Matsuda 002; Shota Yamada 001; Shuichi Katsumata; Yusuke Sakai 001; Tadanori Teruya; Jacob C. N. Schuldt; Nuttapong Attrapadung; Goichiro Hanaoka; Kanta Matsuura; et al. (FC (1), 2023)

Practical Round-Optimal Blind Signatures in the ROM from Standard Assumptions. - Shuichi Katsumata; Michael Reichle; Yusuke Sakai 001 (IACR Cryptol. ePrint Arch., 2023)

More Efficient Two-Round Multi-Signature Scheme with Provably Secure Parameters. - Kaoru Takemure; Yusuke Sakai 001; Bagus Santoso; Goichiro Hanaoka; Kazuo Ohta (IACR Cryptol. ePrint Arch., 2023)

Fault-Tolerant Aggregate Signature Schemes against Bandwidth Consumption Attack. - Kyosuke Yamashita; Ryu Ishii; Yusuke Sakai 001; Tadanori Teruya; Takahiro Matsuda 002; Goichiro Hanaoka; Kanta Matsuura; Tsutomu Matsumoto (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2023)

Privacy-Preserving Verifiable CNNs. - Nuttapong Attrapadung; Goichiro Hanaoka; Ryo Hiromasa; Yoshihiro Koseki; Takahiro Matsuda 002; Yutaro Nishida; Yusuke Sakai 001; Jacob C. N. Schuldt; Satoshi Yasuda (ACNS (2), 2024)

Anonymous Reputation Systems with Revocation, Revisited. - Ryuya Hayashi; Shuichi Katsumata; Yusuke Sakai 001 (FC (2), 2024)

On Key Substitution Attacks against Aggregate Signatures and Multi-Signatures. - Yuuki Fujita; Yusuke Sakai 001; Kyosuke Yamashita; Goichiro Hanaoka (IACR Cryptol. ePrint Arch., 2024)

Attribute-Based Signatures for Circuits with Optimal Parameter Size from Standard Assumptions. - Ryuya Hayashi; Yusuke Sakai 001; Shota Yamada 001 (IACR Cryptol. ePrint Arch., 2024)

Constraints and Evaluations on Signature Transmission Interval for Aggregate Signatures with Interactive Tracing Functionality. - Ryu Ishii; Kyosuke Yamashita; Zihao Song; Yusuke Sakai 001; Tadanori Teruya; Takahiro Matsuda 002; Goichiro Hanaoka; Kanta Matsuura; Tsutomu Matsumoto (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

More Efficient Two-Round Multi-Signature Scheme with Provably Secure Parameters for Standardized Elliptic Curves. - Kaoru Takemure; Yusuke Sakai 001; Bagus Santoso; Goichiro Hanaoka; Kazuo Ohta (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

Signatures with Tight Adaptive Corruptions from Search Assumptions. - Keitaro Hashimoto; Wakaha Ogata; Yusuke Sakai 001 (IACR Cryptol. ePrint Arch., 2025)