A Certificate Revocable Anonymous Authentication Scheme with Designated Verifier. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (ARES, 2009)

A Selectable k-Times Relaxed Anonymous Authentication Scheme. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (WISA, 2009)

A Dynamic Attribute-Based Group Signature Scheme and Its Application in an Anonymous Survey for the Collection of Attribute Statistics. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (J. Inf. Process., 2009)

Efficient Privacy-Preserving Data Mining in Malicious Model. - Keita Emura; Atsuko Miyaji; Mohammad Shahriar Rahman (ADMA (1), 2010)

An Identity-Based Proxy Re-Encryption Scheme with Source Hiding Property, and its Application to a Mailing-List System. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (EuroPKI, 2010)

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

An Anonymous Designated Verifier Signature Scheme with Revocation: How to Protect a Company's Reputation. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (ProvSec, 2010)

A Timed-Release Proxy Re-encryption Scheme and Its Application to Fairly-Opened Multicast Communication. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (ProvSec, 2010)

A ciphertext-policy attribute-based encryption scheme with constant ciphertext length. - Keita Emura; Atsuko Miyaji; Kazumasa Omote; Akito Nomura; Masakazu Soshi (Int. J. Appl. Cryptogr., 2010)

Toward Dynamic Attribute-Based Signcryption (Poster). - Keita Emura; Atsuko Miyaji; Mohammad Shahriar Rahman (ACISP, 2011)

Non-interactive Opening for Ciphertexts Encrypted by Shared Keys. - Jiageng Chen; Keita Emura; Atsuko Miyaji (ICICS, 2011)

Ideal Secret Sharing Schemes with Share Selectability. - Keita Emura; Atsuko Miyaji; Akito Nomura; Mohammad Shahriar Rahman; Masakazu Soshi (ICICS, 2011)

A Revocable Group Signature Scheme with the Property of Hiding the Number of Revoked Users. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (ICISC, 2011)

Adaptive Secure-Channel Free Public-Key Encryption with Keyword Search Implies Timed Release Encryption. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (ISC, 2011)

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

A Timed-Release Proxy Re-Encryption Scheme. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

An Intrusion and Random-Number-Leakage Resilient Scheme in Mobile Unattended WSNs. - Tatsuro Iida; Keita Emura; Atsuko Miyaji; Kazumasa Omote (AINA Workshops, 2012)

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

Time-Specific Encryption from Forward-Secure Encryption. - Kohei Kasamatsu; Takahiro Matsuda 002; Keita Emura; Nuttapong Attrapadung; Goichiro Hanaoka; Hideki Imai (SCN, 2012)

Constructing Secure-channel Free Searchable Encryption from Anonymous IBE with Partitioned Ciphertext Structure. - Keita Emura; Mohammad Shahriar Rahman (SECRYPT, 2012)

Flexible Group Key Exchange with On-demand Computation of Subgroup Keys Supporting Subgroup Key Randomization. - Keita Emura; Takashi Sato (SECRYPT, 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)

Dynamic attribute-based signcryption without random oracles. - Keita Emura; Atsuko Miyaji; Mohammad Shahriar Rahman (Int. J. Appl. Cryptogr., 2012)

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

Risk visualization and alerting system: architecture and proof-of-concept implementation. - Takeshi Takahashi 001; Keita Emura; Akira Kanaoka; Shin'ichiro Matsuo; Tadashi Minowa (SESP@CCS Asia, 2013)

Privacy-Preserving Two-Party k-Means Clustering in Malicious Model. - Rahena Akhter; Rownak Jahan Chowdhury; Keita Emura; Tamzida Islam; Mohammad Shahriar Rahman; Nusrat Rubaiyat (COMPSAC Workshops, 2013)

Chosen Ciphertext Secure Keyed-Homomorphic Public-Key Encryption. - Keita Emura; Goichiro Hanaoka; Go Ohtake; Takahiro Matsuda 002; Shota Yamada 001 (Public Key Cryptography, 2013)

Private Multiparty Set Intersection Protocol in Rational Model. - Keita Emura; Atsuko Miyaji; Mohammad Shahriar Rahman (TrustCom/ISPA/IUCC, 2013)

Chosen Ciphertext Secure Keyed-Homomorphic Public-Key Encryption. - Keita Emura; Goichiro Hanaoka; Koji Nuida; Go Ohtake; Takahiro Matsuda 002; Shota Yamada 001 (IACR Cryptol. ePrint Arch., 2013)

Revocable Identity-Based Encryption Revisited: Security Model and Construction. - Jae Hong Seo; Keita Emura (IACR Cryptol. ePrint Arch., 2013)

Efficient Delegation of Key Generation and Revocation Functionalities in Identity-Based Encryption. - Jae Hong Seo; Keita Emura (IACR Cryptol. ePrint Arch., 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 Remark on " Efficient Revocable ID-Based Encryption with a Public Channel". - Jae Hong Seo; Keita Emura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

On Discrete Logarithm Based Additively Homomorphic Encryption. - Jae Hong Seo; Keita Emura (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)

Anonymous Data Collection System with Mediators. - Hiromi Arai; Keita Emura; Takahiro Matsuda 002 (BalkanCryptSec, 2014)

Building secure and anonymous communication channel: formal model and its prototype implementation. - Keita Emura; Akira Kanaoka; Satoshi Ohta; Takeshi Takahashi 001 (SAC, 2014)

A Secure Genetic Algorithm for the Subset Cover Problem and Its Application to Privacy Protection. - Dan Bogdanov; Keita Emura; Roman Jagomägis; Akira Kanaoka; Shin'ichiro Matsuo; Jan Willemson (WISTP, 2014)

Road-to-Vehicle Communications with Time-Dependent Anonymity: A Light Weight Construction and its Experimental Results. - Keita Emura; Takuya Hayashi 001 (IACR Cryptol. ePrint Arch., 2014)

Revocable Identity-Based Encryption with Rejoin Functionality. - Jae Hong Seo; Keita Emura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 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)

An r-Hiding Revocable Group Signature Scheme: Group Signatures with the Property of Hiding the Number of Revoked Users. - Keita Emura; Atsuko Miyaji; Kazumasa Omote (J. Appl. Math., 2014)

Revocable hierarchical identity-based encryption. - Jae Hong Seo; Keita Emura (Theor. Comput. Sci., 2014)

Revocable Identity-Based Cryptosystem Revisited: Security Models and Constructions. - Jae Hong Seo; Keita Emura (IEEE Trans. Inf. Forensics Secur., 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)

A KEM/DEM-Based Construction for Secure and Anonymous Communication. - Keita Emura; Akira Kanaoka; Satoshi Ohta; Takeshi Takahashi 001 (COMPSAC Workshops, 2015)

Revocable Hierarchical Identity-Based Encryption: History-Free Update, Security Against Insiders, and Short Ciphertexts. - Jae Hong Seo; Keita Emura (CT-RSA, 2015)

Adaptive-ID Secure Revocable Hierarchical Identity-Based Encryption. - Jae Hong Seo; Keita Emura (IWSEC, 2015)

A Light-Weight Group Signature Scheme with Time-Token Dependent Linking. - Keita Emura; Takuya Hayashi 001 (LightSec, 2015)

Keyword Revocable Searchable Encryption with Trapdoor Exposure Resistance and Re-generateability. - Keita Emura; Le Trieu Phong; Yohei Watanabe 001 (TrustCom/BigDataSE/ISPA (1), 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)

SKENO: Secret key encryption with non-interactive opening. - Jiageng Chen; Keita Emura; Atsuko Miyaji (J. Math. Cryptol., 2015)

Generic constructions of secure-channel free searchable encryption with adaptive security. - Keita Emura; Atsuko Miyaji; Mohammad Shahriar Rahman; Kazumasa Omote (Secur. Commun. Networks, 2015)

Toward securing tire pressure monitoring systems: A case of PRESENT-based implementation. - Keita Emura; Takuya Hayashi 001; Shiho Moriai (ISITA, 2016)

On the Leakage Resilient Cryptography in Game-Theoretic Settings. - Mohammad Shahriar Rahman; Keita Emura; Shinsaku Kiyomoto (Trustcom/BigDataSE/ISPA, 2016)

New Revocable IBE in Prime-Order Groups: Adaptively Secure, Decryption Key Exposure Resistant, and with Short Public Parameters. - Yohei Watanabe 001; Keita Emura; Jae Hong Seo (IACR Cryptol. ePrint Arch., 2016)

Semi-Generic Transformation of Revocable Hierarchical Identity-Based Encryption and Its DBDH Instantiation. - Keita Emura; Jae Hong Seo; Taek-Young Youn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016)

Time-specific encryption from forward-secure encryption: generic and direct constructions. - Kohei Kasamatsu; Takahiro Matsuda 002; Keita Emura; Nuttapong Attrapadung; Goichiro Hanaoka; Hideki Imai (Int. J. Inf. Sec., 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)

Revocable hierarchical identity-based encryption via history-free approach. - Jae Hong Seo; Keita Emura (Theor. Comput. Sci., 2016)

Secure and Anonymous Communication Technique: Formal Model and Its Prototype Implementation. - Keita Emura; Akira Kanaoka; Satoshi Ohta; Kazumasa Omote; Takeshi Takahashi 001 (IEEE Trans. Emerg. Top. Comput., 2016)

Group Signatures with Time-bound Keys Revisited: A New Model and an Efficient Construction. - Keita Emura; Takuya Hayashi 001; Ai Ishida (AsiaCCS, 2017)

Mis-operation Resistant Searchable Homomorphic Encryption. - Keita Emura; Takuya Hayashi 001; Noboru Kunihiro; Jun Sakuma (AsiaCCS, 2017)

A Generic Construction of Secure-Channel Free Searchable Encryption with Multiple Keywords. - Keita Emura (NSS, 2017)

A Framework of Privacy Preserving Anomaly Detection: Providing Traceability without Big Brother. - Hiromi Arai; Keita Emura; Takuya Hayashi 001 (WPES@CCS, 2017)

Privacy-Preserving Aggregation of Time-Series Data with Public Verifiability from Simple Assumptions. - Keita Emura (IACR Cryptol. ePrint Arch., 2017)

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)

Establishing secure and anonymous communication channel: KEM/DEM-based construction and its implementation. - Keita Emura; Akira Kanaoka; Satoshi Ohta; Takeshi Takahashi 001 (J. Inf. Secur. Appl., 2017)

A Generic Construction of Integrated Secure-Channel Free PEKS and PKE. - Tatsuya Suzuki 002; Keita Emura; Toshihiro Ohigashi (ISPEC, 2018)

A Revocable Group Signature Scheme with Scalability from Simple Assumptions and Its Implementation. - Keita Emura; Takuya Hayashi 001 (ISC, 2018)

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

Chosen ciphertext secure keyed-homomorphic public-key cryptosystems. - Keita Emura; Goichiro Hanaoka; Koji Nuida; Go Ohtake; Takahiro Matsuda 002; Shota Yamada 001 (Des. Codes Cryptogr., 2018)

Generic Constructions for Fully Secure Revocable Attribute-Based Encryption. - Kotoko Yamada; Nuttapong Attrapadung; Keita Emura; Goichiro Hanaoka; Keisuke Tanaka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018)

Accumulable optimistic fair exchange from verifiably encrypted homomorphic signatures. - Jae Hong Seo; Keita Emura; Keita Xagawa; Kazuki Yoneyama (Int. J. Inf. Sec., 2018)

Road-to-Vehicle Communications With Time-Dependent Anonymity: A Lightweight Construction and Its Experimental Results. - Keita Emura; Takuya Hayashi 001 (IEEE Trans. Veh. Technol., 2018)

Session details: Invited Talk. - Keita Emura (APKC@AsiaCCS, 2019)

Identity-Based Encryption with Security Against the KGC: A Formal Model and Its Instantiation from Lattices. - Keita Emura; Shuichi Katsumata; Yohei Watanabe 001 (ESORICS (2), 2019)

Privacy-Preserving Aggregation of Time-Series Data with Public Verifiability from Simple Assumptions and Its Implementations. - Keita Emura; Hayato Kimura 002; Toshihiro Ohigashi; Tatsuya Suzuki 002 (Comput. J., 2019)

A Revocable Group Signature Scheme with Scalability from Simple Assumptions and Its Application to Identity Management. - Keita Emura; Takuya Hayashi 001 (IACR Cryptol. ePrint Arch., 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)

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)

A Generic Construction of Integrated Secure-Channel Free PEKS and PKE and its Application to EMRs in Cloud Storage. - Tatsuya Suzuki 002; Keita Emura; Toshihiro Ohigashi (J. Medical Syst., 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)

Cache-22: A Highly Deployable Encrypted Cache System. - Keita Emura; Shiho Moriai; Takuma Nakajima; Masato Yoshimi (ISITA, 2020)

Verifiable Functional Encryption using Intel SGX. - Tatsuya Suzuki 002; Keita Emura; Toshihiro Ohigashi; Kazumasa Omote (IACR Cryptol. ePrint Arch., 2020)

A Revocable Group Signature Scheme with Scalability from Simple Assumptions. - Keita Emura; Takuya Hayashi 001 (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Implementation of a Strongly Robust Identity-Based Encryption Scheme over Type-3 Pairings. - Hiroshi Okano; Keita Emura; Takuya Ishibashi 001; Toshihiro Ohigashi; Tatsuya Suzuki 002 (Int. J. Netw. Comput., 2020)

Secure-channel free searchable encryption with multiple keywords: A generic construction, an instantiation, and its implementation. - Keita Emura; Katsuhiko Ito; Toshihiro Ohigashi (J. Comput. Syst. Sci., 2020)

Group Signatures with Time-Bound Keys Revisited: A New Model, an Efficient Construction, and its Implementation. - Keita Emura; Takuya Hayashi 001; Ai Ishida (IEEE Trans. Dependable Secur. Comput., 2020)

A Privacy-Preserving Enforced Bill Collection System using Smart Contracts. - Tomoki Fujitani; Keita Emura; Kazumasa Omote (AsiaJCIS, 2021)

Implementation and Evaluation of an Identity-Based Encryption with Security Against the KGC. - Shuntaro Ema; Yuta Sato; Keita Emura; Toshihiro Ohigashi (CANDAR (Workshops), 2021)

An Anonymous Trust-Marking Scheme on Blockchain Systems. - Teppei Sato; Keita Emura; Tomoki Fujitani; Kazumasa Omote (IEEE Access, 2021)

Adaptively secure revocable hierarchical IBE from k-linear assumption. - Keita Emura; Atsushi Takayasu; Yohei Watanabe 001 (Des. Codes Cryptogr., 2021)

Efficient identity-based encryption with Hierarchical key-insulation from HIBE. - Keita Emura; Atsushi Takayasu; Yohei Watanabe 001 (Des. Codes Cryptogr., 2021)

Output Prediction Attacks on SPN Block Ciphers using Deep Learning. - Hayato Kimura 002; Keita Emura; Takanori Isobe 001; Ryoma Ito 001; Kazuto Ogawa; Toshihiro Ohigashi (IACR Cryptol. ePrint Arch., 2021)

A Generic Construction of CCA-secure Attribute-based Encryption with Equality Test. - Kyoichi Asano; Keita Emura; Atsushi Takayasu; Yohei Watanabe 001 (IACR Cryptol. ePrint Arch., 2021)

State-free End-to-End Encrypted Storage and Chat Systems based on Searchable Encryption. - Keita Emura; Ryoma Ito 001; Sachiko Kanamori; Ryo Nojima; Yohei Watanabe 001 (IACR Cryptol. ePrint Arch., 2021)

Generic Constructions of Revocable Hierarchical Identity-based Encryption. - Keita Emura; Atsushi Takayasu; Yohei Watanabe 001 (IACR Cryptol. ePrint Arch., 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)

Privacy-Preserving Data Analysis: Providing Traceability without Big Brother. - Hiromi Arai; Keita Emura; Takuya Hayashi 001 (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

On the Security of Keyed-Homomorphic PKE: Preventing Key Recovery Attacks and Ciphertext Validity Attacks. - Keita Emura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Efficient revocable identity-based encryption with short public parameters. - Keita Emura; Jae Hong Seo; Yohei Watanabe 001 (Theor. Comput. Sci., 2021)

Output Prediction Attacks on Block Ciphers Using Deep Learning. - Hayato Kimura 002; Keita Emura; Takanori Isobe 001; Ryoma Ito 001; Kazuto Ogawa; Toshihiro Ohigashi (ACNS Workshops, 2022)

Generic Construction of Public-key Authenticated Encryption with Keyword Search Revisited: Stronger Security and Efficient Construction. - Keita Emura (IACR Cryptol. ePrint Arch., 2022)

Membership Privacy for Asynchronous Group Messaging. - Keita Emura; Kaisei Kajita; Ryo Nojima; Kazuto Ogawa; Go Ohtake (IACR Cryptol. ePrint Arch., 2022)

Cache-22: A Highly Deployable End-To-End Encrypted Cache System with Post-Quantum Security. - Keita Emura; Shiho Moriai; Takuma Nakajima; Masato Yoshimi (IACR Cryptol. ePrint Arch., 2022)

Continuous Group Key Agreement with Flexible Authorization and Its Applications. - Kaisei Kajita; Keita Emura; Kazuto Ogawa; Ryo Nojima; Go Ohtake (IACR Cryptol. ePrint Arch., 2022)

Keyed-Fully Homomorphic Encryption without Indistinguishability Obfuscation. - Shingo Sato; Keita Emura; Atsushi Takayasu (IACR Cryptol. ePrint Arch., 2022)

Privacy-Preserving Federated Learning for Detecting Fraudulent Financial Transactions in Japanese Banks. - Sachiko Kanamori; Taeko Abe; Takuma Ito; Keita Emura; Lihua Wang 001; Shuntaro Yamamoto; Le Trieu Phong; Kaien Abe; Sangwook Kim; Ryo Nojima; Seiichi Ozawa; Shiho Moriai (J. Inf. Process., 2022)

Providing Membership Privacy to the Asynchronous Ratcheting Trees Protocol without losing Scalability. - Keita Emura; Kaisei Kajita; Ryo Nojima; Kazuto Ogawa; Go Ohtake (J. Wirel. Mob. Networks Ubiquitous Comput. Dependable Appl., 2022)

Identity-based encryption with security against the KGC: A formal model and its instantiations. - Keita Emura; Shuichi Katsumata; Yohei Watanabe 001 (Theor. Comput. Sci., 2022)

An End-to-End Encrypted Cache System with Time-Dependent Access Control. - Keita Emura; Masato Yoshimi (ICISSP, 2023)

Cybersecurity-Enhanced Encrypted Control System Using Keyed-Homomorphic Public Key Encryption. - Masaki Miyamoto; Kaoru Teranishi; Keita Emura; Kiminao Kogiso (IEEE Access, 2023)

Generic Construction of Broadcast Authenticated Encryption with Keyword Search. - Keita Emura (IACR Cryptol. ePrint Arch., 2023)

Generic Construction of Forward Secure Public Key Authenticated Encryption with Keyword Search. - Keita Emura (IACR Cryptol. ePrint Arch., 2023)

Generic Construction of Dual-Server Public Key Authenticated Encryption with Keyword Search. - Keita Emura (IACR Cryptol. ePrint Arch., 2023)

On the Feasibility of Identity-based Encryption with Equality Test against Insider Attacks. - Keita Emura (IACR Cryptol. ePrint Arch., 2023)

Generic Construction of Fully Anonymous Broadcast Authenticated Encryption with Keyword Search with Adaptive Corruptions. - Keita Emura (IET Inf. Secur., 2023)

A Deeper Look into Deep Learning-based Output Prediction Attacks Using Weak SPN Block Ciphers. - Hayato Kimura 002; Keita Emura; Takanori Isobe 001; Ryoma Ito 001; Kazuto Ogawa; Toshihiro Ohigashi (J. Inf. Process., 2023)

A Generic Construction of CCA-Secure Identity-Based Encryption with Equality Test against Insider Attacks. - Keita Emura; Atsushi Takayasu (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2023)

Can Sleep Apnea Be Detected from Human Pulse Waveform with Laplace Noise? - Itaru Kaneko; Le Trieu Phong; Keita Emura; Emi Yuda (J. Adv. Comput. Intell. Intell. Informatics, 2023)

An Identity Management System Using Group Signatures with Message-Dependent Opening. - Yuto Imura; Keita Emura (AsiaJCIS, 2024)

On the Traceability of Group Signatures: Uncorrupted User Must Exist. - Keita Emura (IACR Cryptol. ePrint Arch., 2024)

On the BUFF Security of ECDSA with Key Recovery. - Keita Emura (IACR Cryptol. ePrint Arch., 2024)

Key-Insulated and Privacy-Preserving Signature Scheme with Publicly Derived Public Key, Revisited: Consistency, Outsider Strong Unforgeability, and Generic Construction. - Keita Emura (IACR Cryptol. ePrint Arch., 2024)

Attribute-based Keyed (Fully) Homomorphic Encryption. - Keita Emura; Shingo Sato; Atsushi Takayasu (IACR Cryptol. ePrint Arch., 2024)

More Efficient Adaptively Secure Lattice-Based IBE with Equality Test in the Standard Model. - Kyoichi Asano; Keita Emura; Atsushi Takayasu (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

Generic Construction of Public-Key Authenticated Encryption with Keyword Search Revisited. - Keita Emura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

Outsider-Anonymous Broadcast Encryption with Keyword Search: Generic Construction, CCA Security, and with Sublinear Ciphertexts. - Keita Emura; Kaisei Kajita; Go Ohtake (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

A Sealed-Bid Auction with Fund Binding: Preventing Maximum Bidding Price Leakage. - Kota Chin; Keita Emura; Shingo Sato; Kazumasa Omote (IEICE Trans. Inf. Syst., 2024)

A Smart Contract-Based Non-Transferable Signature Verification System using Nominative Signatures. - Hinata Nishino; Kazumasa Omote; Keita Emura (AsiaJCIS, 2025)

Security Analysis on a Public-Key Inverted-Index Keyword Search Scheme with Designated Tester. - Mizuki Hayashi; Keita Emura (IACR Cryptol. ePrint Arch., 2025)

Group Signatures with Message-Dependent Opening Directly Imply Timed-Release Encryption. - Yuto Imura; Keita Emura (IACR Cryptol. ePrint Arch., 2025)

On the Relations between Matchmaking Public Key Encryption and Public Key Authenticated Encryption with Keyword Search. - Takeshi Yoshida; Keita Emura (IACR Cryptol. ePrint Arch., 2025)

An anonymous yet accountable contract wallet system using account abstraction. - Kota Chin; Keita Emura; Kazumasa Omote (J. Inf. Secur. Appl., 2025)

Implementation and Evaluation of an Identity-based Encryption with Security Against the KGC. - Shuntaro Ema; Yuta Sato; Hinata Nishino; Keita Emura; Toshihiro Ohigashi (J. Inf. Process., 2025)

On the Consideration of Vanity Address Generation via Identity-Based Signatures. - Shogo Murasaki; Kazumasa Omote; Keita Emura (CoRR, 2025)

Malleability-Resistant Encrypted Control System with Disturbance Compensation and Real-Time Attack Detection. - Naoki Aizawa; Keita Emura; Kiminao Kogiso (CoRR, 2025)