Keita Emura

Akihisa Kodate, Yusuke Sakai, Keita Emura, 2014, 2014 IEEE 13th International Conference on Trust, Security and Privacy in Computing and Communications.

Session details: Invited Talk

Keita Emura, 2019, APKC@AsiaCCS.

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, 2017, CT-RSA.

Private Multiparty Set Intersection Protocol in Rational Model

Atsuko Miyaji, Keita Emura, Mohammad Shahriar Rahman, 2013, 2013 12th IEEE International Conference on Trust, Security and Privacy in Computing and Communications.

Efficient Delegation of Key Generation and Revocation Functionalities in Identity-Based Encryption

Keita Emura, Jae Hong Seo, K. Emura, 2013, CT-RSA.

A ciphertext-policy attribute-based encryption scheme with constant ciphertext length

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2010, Int. J. Appl. Cryptogr..

A Dynamic Attribute-Based Group Signature Scheme and its Application in an Anonymous Survey for the Collection of Attribute Statistics

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2009, 2009 International Conference on Availability, Reliability and Security.

An r-Hiding Revocable Group Signature Scheme: Group Signatures with the Property of Hiding the Number of Revoked Users

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2014, J. Appl. Math..

Adaptive-ID Secure Revocable Hierarchical Identity-Based Encryption

Keita Emura, Jae Hong Seo, 2015, IWSEC.

Anonymous Data Collection System with Mediators

Keita Emura, Takahiro Matsuda, Hiromi Arai, 2014, BalkanCryptSec.

Group Signatures with Time-Bound Keys Revisited: A New Model, an Efficient Construction, and its Implementation

Keita Emura, Ai Ishida, Takuya Hayashi, 2020, IEEE Transactions on Dependable and Secure Computing.

Chosen ciphertext secure keyed-homomorphic public-key cryptosystems

Koji Nuida, Keita Emura, Goichiro Hanaoka, 2018, Des. Codes Cryptogr..

An Intrusion and Random-Number-Leakage Resilient Scheme in Mobile Unattended WSNs

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2012, 2012 26th International Conference on Advanced Information Networking and Applications Workshops.

A ciphertext-policy attribute-based encryption scheme with constant ciphertext length

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2009, Int. J. Appl. Cryptogr..

Generic constructions of secure-channel free searchable encryption with adaptive security

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2015, Secur. Commun. Networks.

Fully Anonymous Group Signature with Verifier-Local Revocation

Yusuke Sakai, Keita Emura, Goichiro Hanaoka, 2018, SCN.

Toward dynamic attribute-based signcryption

Atsuko Miyaji, Keita Emura, Mohammad Shahriar Rahman, 2011, ACISP 2011.

A privacy-enhanced access log management mechanism in SSO systems from nominative signatures

Akihisa Kodate, Yusuke Sakai, Keita Emura, 2017, Int. J. Appl. Cryptogr..

A Revocable Group Signature Scheme with Scalability from Simple Assumptions and Its Implementation

Keita Emura, Takuya Hayashi, 2018, ISC.

Building secure and anonymous communication channel: formal model and its prototype implementation

Keita Emura, Takeshi Takahashi, Akira Kanaoka, 2014, SAC.

Methods for Restricting Message Space in Public-Key Encryption

Yutaka Kawai, Yusuke Sakai, Keita Emura, 2013, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Disavowable Public Key Encryption with Non-interactive Opening

Keita Emura, Goichiro Hanaoka, Keisuke Tanaka, 2015, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

An Anonymous Trust-Marking Scheme on Blockchain Systems pdf

Keita Emura, Kazumasa Omote, Teppei Sato, 2020, ArXiv.

On the Security of Keyed-Homomorphic PKE: Preventing Key Recovery Attacks and Ciphertext Validity Attacks

Keita Emura, 2021, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Constructing Secure-channel Free Searchable Encryption from Anonymous IBE with Partitioned Ciphertext Structure

Keita Emura, Mohammad Shahriar Rahman, K. Emura, 2018, SECRYPT.

A Revocable Group Signature Scheme with the Property of Hiding the Number of Revoked Users

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2011, ICISC.

Disavowable Public Key Encryption with Non-interactive Opening

Yusuke Sakai, Keita Emura, Goichiro Hanaoka, 2015, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Adaptively Secure Revocable Hierarchical IBE from k-linear Assumption

Yohei Watanabe, Keita Emura, Atsushi Takayasu, 2020, IACR Cryptol. ePrint Arch..

An Identity-Based Proxy Re-Encryption Scheme with Source Hiding Property, and its Application to a Mailing-List System

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2010, EuroPKI.

Constructions of dynamic and non-dynamic threshold public-key encryption schemes with decryption consistency

Kazuo Ohta, Yusuke Sakai, Jacob C. N. Schuldt, 2016, Theor. Comput. Sci..

Group Signature with Deniability: How to Disavow a Signature

Yusuke Sakai, Keita Emura, Goichiro Hanaoka, 2017 .

An Anonymous Trust-Marking Scheme on NEM Blockchain Systems

Keita Emura, Kazumasa Omote, Teppei Sato, 2020 .

Implementation of a Strongly Robust Identity-Based Encryption Scheme over Type-3 Pairings

Tatsuya Suzuki, Keita Emura, Toshihiro Ohigashi, 2019, 2019 Seventh International Symposium on Computing and Networking (CANDAR).

Privacy-Preserving Data Analysis: Providing Traceability without Big Brother

Keita Emura, Takuya Hayashi, Hiromi Arai, 2021, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

On the Leakage Resilient Cryptography in Game-Theoretic Settings

Keita Emura, Shinsaku Kiyomoto, Mohammad Shahriar Rahman, 2016, 2016 IEEE Trustcom/BigDataSE/ISPA.

Generic Constructions for Fully Secure Revocable Attribute-Based Encryption

Keita Emura, Goichiro Hanaoka, Keisuke Tanaka, 2017, ESORICS.

Chosen Ciphertext Secure Keyed-Homomorphic Public-Key Encryption

Keita Emura, Goichiro Hanaoka, Takahiro Matsuda, 2013, Public Key Cryptography.

Accumulable optimistic fair exchange from verifiably encrypted homomorphic signatures

Kazuki Yoneyama, Keita Emura, Jae Hong Seo, 2015, International Journal of Information Security.

An Anonymous Designated Verifier Signature Scheme with Revocation: How to Protect a Company's Reputation

Atsuko Miyaji, Keita Emura, Kazumasa Omote, 2010, ProvSec.

A Framework of Privacy Preserving Anomaly Detection: Providing Traceability without Big Brother

Keita Emura, Takuya Hayashi, Hiromi Arai, 2017, WPES@CCS.

Privacy-Preserving Two-Party k-Means Clustering in Malicious Model

Keita Emura, Mohammad Shahriar Rahman, Rahena Akhter, 2013, 2013 IEEE 37th Annual Computer Software and Applications Conference Workshops.

Proceedings of the 3rd ACM International Workshop on ASIA Public-Key Cryptography

Keita Emura, Goichiro Hanaoka, Rui Zhang, 2016, ACM CCS 2016.

A Revocable Group Signature Scheme from Identity-Based Revocation Techniques: Achieving Constant-Size Revocation List

Yusuke Sakai, Keita Emura, Goichiro Hanaoka, 2014, ACNS.

Efficient identity-based encryption with Hierarchical key-insulation from HIBE

Yohei Watanabe, Keita Emura, Atsushi Takayasu, 2021, Designs, Codes and Cryptography.

Identity-Based Encryption with Security Against the KGC: A Formal Model and Its Instantiation from Lattices

Yohei Watanabe, Keita Emura, Shuichi Katsumata, 2019, ESORICS.

An Anonymous Trust-Marking Scheme on Blockchain Systems

Keita Emura, Kazumasa Omote, Teppei Sato, 2021, 2021 IEEE International Conference on Blockchain and Cryptocurrency (ICBC).

Efficient revocable identity-based encryption with short public parameters

Keita Emura, Jae Hong Seo, Yohei Watanabe, 2021, Theor. Comput. Sci..

A Generic Construction of CCA-secure Attribute-based Encryption with Equality Test

Keita Emura, Atsushi Takayasu, Yohei Watanabe, 2021, IACR Cryptol. ePrint Arch..

Generic Constructions of Revocable Hierarchical Identity-based Encryption

Keita Emura, Atsushi Takayasu, Yohei Watanabe, 2021, IACR Cryptol. ePrint Arch..

State-free End-to-End Encrypted Storage and Chat Systems based on Searchable Encryption

Ryoma Ito, Keita Emura, Ryo Nojima, 2021, IACR Cryptol. ePrint Arch..

A Privacy-Preserving Enforced Bill Collection System using Smart Contracts

Keita Emura, Kazumasa Omote, Tomoki Fujitani, 2021, 2021 16th Asia Joint Conference on Information Security (AsiaJCIS).

An Anonymous Trust-Marking Scheme on Blockchain Systems

Keita Emura, Kazumasa Omote, Teppei Sato, 2021, IEEE Access.

Keyed-Fully Homomorphic Encryption without Indistinguishability Obfuscation

Keita Emura, Atsushi Takayasu, Shingo Sato, 2022, IACR Cryptol. ePrint Arch..

Output Prediction Attacks on SPN Block Ciphers using Deep Learning

Ryoma Ito, Keita Emura, Kazuto Ogawa, 2021, IACR Cryptol. ePrint Arch..

Poster : Visualization of user ’ s end-to-end security risks

Keita Emura, Akira Kanaoka, Yuuki Takano, 2012 .

Long-span optical FSK heterodyne single-filter detection transmission experiment using a phase-tunable DFB laser diode

Ikuo Mito, Keita Emura, M. Yamaguchi, 1986 .