Keita Emura

Google Scholar ORCID: 0000-0002-8969-3581
48 publications in security and cryptology related venues
Year
Venue
Title
2025
journals/istr
An anonymous yet accountable contract wallet system using account abstraction.
Kota Chin Keita Emura Kazumasa Omote
2025
conf/asiajcis
Security Analysis on a Public-Key Inverted-Index Keyword Search Scheme with Designated Tester.
Mizuki Hayashi Keita Emura
2025
conf/asiajcis
A Smart Contract-Based Non-Transferable Signature Verification System using Nominative Signatures.
Hinata Nishino Kazumasa Omote Keita Emura
2025
journals/cic
Key-Insulated and Privacy-Preserving Signature Scheme with Publicly Derived Public Key, Revisited: Consistency, Outsider Strong Unforgeability, and Generic Construction.
Keita Emura
2024
conf/acisp
On the Feasibility of Identity-Based Encryption with Equality Test Against Insider Attacks.
Keita Emura
2024
conf/asiajcis
An Identity Management System Using Group Signatures with Message-Dependent Opening.
Yuto Imura Keita Emura
2024
conf/acns
Generic Construction of Forward Secure Public Key Authenticated Encryption with Keyword Search.
Keita Emura
2022
conf/acns
Output Prediction Attacks on Block Ciphers Using Deep Learning.
Hayato Kimura Keita Emura Takanori Isobe Ryoma Ito Kazuto Ogawa Toshihiro Ohigashi
2022
conf/acns
Keyed-Fully Homomorphic Encryption Without Indistinguishability Obfuscation.
Shingo Sato Keita Emura Atsushi Takayasu
2022
conf/provsec
A Generic Construction of CCA-Secure Attribute-Based Encryption with Equality Test.
Kyoichi Asano Keita Emura Atsushi Takayasu Yohei Watanabe
2022
conf/asiapkc
Generic Construction of Public-key Authenticated Encryption with Keyword Search Revisited: Stronger Security and Efficient Construction.
Keita Emura
2022
conf/wisa
Membership Privacy for Asynchronous Group Messaging.
Keita Emura Kaisei Kajita Ryo Nojima Kazuto Ogawa Go Ohtake
2021
conf/asiajcis
A Privacy-Preserving Enforced Bill Collection System using Smart Contracts.
Tomoki Fujitani Keita Emura Kazumasa Omote
2021
conf/provsec
Verifiable Functional Encryption Using Intel SGX.
Tatsuya Suzuki Keita Emura Toshihiro Ohigashi Kazumasa Omote
2021
conf/icbc2
An Anonymous Trust-Marking Scheme on Blockchain Systems.
Teppei Sato Keita Emura Tomoki Fujitani Kazumasa Omote
2019
conf/ccs
Session details: Invited Talk.
Keita Emura
2019
conf/ccs
Proper Usage of the Group Signature Scheme in ISO/IEC 20008-2.
Ai Ishida Yusuke Sakai Keita Emura Goichiro Hanaoka Keisuke Tanaka
2019
conf/esorics
Identity-Based Encryption with Security Against the KGC: A Formal Model and Its Instantiation from Lattices.
Keita Emura Shuichi Katsumata Yohei Watanabe
2017
journals/istr
Establishing secure and anonymous communication channel: KEM/DEM-based construction and its implementation.
Keita Emura Akira Kanaoka Satoshi Ohta Takeshi Takahashi
2017
conf/ccs
Mis-operation Resistant Searchable Homomorphic Encryption.
Keita Emura Takuya Hayashi Noboru Kunihiro Jun Sakuma
2017
conf/ccs
Group Signatures with Time-bound Keys Revisited: A New Model and an Efficient Construction.
Keita Emura Takuya Hayashi Ai Ishida
2017
conf/acisp
Privacy-Preserving Aggregation of Time-Series Data with Public Verifiability from Simple Assumptions.
Keita Emura
2017
conf/esorics
Generic Constructions for Fully Secure Revocable Attribute-Based Encryption.
Kotoko Yamada Nuttapong Attrapadung Keita Emura Goichiro Hanaoka Keisuke Tanaka
2017
conf/ctrsa
New Revocable IBE in Prime-Order Groups: Adaptively Secure, Decryption Key Exposure Resistant, and with Short Public Parameters.
Yohei Watanabe Keita Emura Jae Hong Seo
2016
conf/cans
Group Signature with Deniability: How to Disavow a Signature.
Ai Ishida Keita Emura Goichiro Hanaoka Yusuke Sakai Keisuke Tanaka
2015
conf/ccs
Disavowable Public Key Encryption with Non-interactive Opening.
Ai Ishida Keita Emura Goichiro Hanaoka Yusuke Sakai Keisuke Tanaka
2015
conf/acisp
Dynamic Threshold Public-Key Encryption with Decryption Consistency from Static Assumptions.
Yusuke Sakai Keita Emura Jacob C. N. Schuldt Goichiro Hanaoka Kazuo Ohta
2015
conf/acns
Accumulable Optimistic Fair Exchange from Verifiably Encrypted Homomorphic Signatures.
Jae Hong Seo Keita Emura Keita Xagawa Kazuki Yoneyama
2015
conf/lightsec
A Light-Weight Group Signature Scheme with Time-Token Dependent Linking.
Keita Emura Takuya Hayashi
2015
conf/ctrsa
Revocable Hierarchical Identity-Based Encryption: History-Free Update, Security Against Insiders, and Short Ciphertexts.
Jae Hong Seo Keita Emura
2015
conf/iwsec
Adaptive-ID Secure Revocable Hierarchical Identity-Based Encryption.
Jae Hong Seo Keita Emura
2014
journals/tifs
Revocable Identity-Based Cryptosystem Revisited: Security Models and Constructions.
Jae Hong Seo Keita Emura
2014
conf/acns
A Revocable Group Signature Scheme from Identity-Based Revocation Techniques: Achieving Constant-Size Revocation List.
Nuttapong Attrapadung Keita Emura Goichiro Hanaoka Yusuke Sakai
2013
conf/ccs
A group signature scheme with unbounded message-dependent opening.
Kazuma Ohara Yusuke Sakai Keita Emura Goichiro Hanaoka
2013
conf/ccs
Risk visualization and alerting system: architecture and proof-of-concept implementation.
Takeshi Takahashi Keita Emura Akira Kanaoka Shin'ichiro Matsuo Tadashi Minowa
2013
conf/pkc
Revocable Identity-Based Encryption Revisited: Security Model and Construction.
Jae Hong Seo Keita Emura
2013
conf/pkc
Chosen Ciphertext Secure Keyed-Homomorphic Public-Key Encryption.
Keita Emura Goichiro Hanaoka Go Ohtake Takahiro Matsuda Shota Yamada
2013
conf/ctrsa
Efficient Delegation of Key Generation and Revocation Functionalities in Identity-Based Encryption.
Jae Hong Seo Keita Emura
2012
conf/pkc
On the Security of Dynamic Group Signatures: Preventing Signature Hijacking.
Yusuke Sakai Jacob C. N. Schuldt Keita Emura Goichiro Hanaoka Kazuo Ohta
2011
conf/acisp
Toward Dynamic Attribute-Based Signcryption (Poster).
Keita Emura Atsuko Miyaji Mohammad Shahriar Rahman
2011
conf/icisc
A Revocable Group Signature Scheme with the Property of Hiding the Number of Revoked Users.
Keita Emura Atsuko Miyaji Kazumasa Omote
2011
conf/icics
Non-interactive Opening for Ciphertexts Encrypted by Shared Keys.
Jiageng Chen Keita Emura Atsuko Miyaji
2011
conf/icics
Ideal Secret Sharing Schemes with Share Selectability.
Keita Emura Atsuko Miyaji Akito Nomura Mohammad Shahriar Rahman Masakazu Soshi
2011
conf/iwsec
Towards Restricting Plaintext Space in Public Key Encryption.
Yusuke Sakai Keita Emura Goichiro Hanaoka Yutaka Kawai Kazumasa Omote
2010
conf/provsec
A Timed-Release Proxy Re-encryption Scheme and Its Application to Fairly-Opened Multicast Communication.
Keita Emura Atsuko Miyaji Kazumasa Omote
2010
conf/provsec
An Anonymous Designated Verifier Signature Scheme with Revocation: How to Protect a Company's Reputation.
Keita Emura Atsuko Miyaji Kazumasa Omote
2010
conf/iwsec
Group Signature Implies PKE with Non-interactive Opening and Threshold PKE.
Keita Emura Goichiro Hanaoka Yusuke Sakai
2009
conf/wisa
-Times Relaxed Anonymous Authentication Scheme.
Keita Emura Atsuko Miyaji Kazumasa Omote

Coauthors

Ai Ishida (4)
Akira Kanaoka (2)
Akito Nomura (1)
Atsuko Miyaji (7)
Atsushi Takayasu (2)
Go Ohtake (2)
Goichiro Hanaoka (11)
Hayato Kimura (1)
Hinata Nishino (1)
Jacob C. N. Schuldt (2)
Jae Hong Seo (7)
Jiageng Chen (1)
Jun Sakuma (1)
Kaisei Kajita (1)
Kazuki Yoneyama (1)
Kazuma Ohara (1)
Kazumasa Omote (10)
Kazuo Ohta (2)
Kazuto Ogawa (2)
Keisuke Tanaka (4)
Keita Emura (48)
Keita Xagawa (1)
Kota Chin (1)
Kotoko Yamada (1)
Kyoichi Asano (1)
Masakazu Soshi (1)
Mizuki Hayashi (1)
Mohammad Shahriar Rahman (2)
Noboru Kunihiro (1)
Nuttapong Attrapadung (2)
Ryo Nojima (1)
Ryoma Ito (1)
Satoshi Ohta (1)
Shin'ichiro Matsuo (1)
Shingo Sato (1)
Shota Yamada (1)
Shuichi Katsumata (1)
Tadashi Minowa (1)
Takahiro Matsuda (1)
Takanori Isobe (1)
Takeshi Takahashi (2)
Takuya Hayashi (3)
Tatsuya Suzuki (1)
Teppei Sato (1)
Tomoki Fujitani (2)
Toshihiro Ohigashi (2)
Yohei Watanabe (3)
Yusuke Sakai (9)
Yutaka Kawai (1)
Yuto Imura (1)
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