New Families of Hyperelliptic Curves with Efficient Gallant-Lambert-Vanstone Method. - Katsuyuki Takashima (ICISC, 2004)

Practical Modifications of Leadbitter et al.'s Repeated-Bits Side-Channel Analysis on (EC)DSA. - Katsuyuki Takashima (WISA, 2005)

A New Type of Fast Endomorphisms on Jacobians of Hyperelliptic Curves and Their Cryptographic Application. - Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

Practical Application of Lattice Basis Reduction Algorithm to Side-Channel Analysis on (EC)DSA. - Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

Scaling Security of Elliptic Curves with Fast Pairing Using Efficient Endomorphisms. - Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Efficiently Computable Distortion Maps for Supersingular Curves. - Katsuyuki Takashima (ANTS, 2008)

Simple Algorithms for Computing a Sequence of 2-Isogenies. - Reo Yoshida; Katsuyuki Takashima (ICISC, 2008)

Homomorphic Encryption and Signatures from Vector Decomposition. - Tatsuaki Okamoto; Katsuyuki Takashima (Pairing, 2008)

Hierarchical Predicate Encryption for Inner-Products. - Tatsuaki Okamoto; Katsuyuki Takashima (ASIACRYPT, 2009)

Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption. - Allison B. Lewko; Tatsuaki Okamoto; Amit Sahai; Katsuyuki Takashima; Brent Waters (IACR Cryptol. ePrint Arch., 2010)

Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption. - Tatsuaki Okamoto; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2010)

Some Key Techniques on Pairing Vector Spaces. - Tatsuaki Okamoto; Katsuyuki Takashima (AFRICACRYPT, 2011)

Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model. - Tatsuaki Okamoto; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2011)

Decentralized Attribute-Based Signatures. - Tatsuaki Okamoto; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2011)

Fully Secure Unbounded Inner-Product and Attribute-Based Encryption. - Tatsuaki Okamoto; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2012)

Provably-Secure Cancelable Biometrics Using 2-DNF Evaluation. - Mitsuhiro Hattori; Nori Matsuda; Takashi Ito; Yoichi Shibata; Katsuyuki Takashima; Takeshi Yoneda (J. Inf. Process., 2012)

Fully-Anonymous Functional Proxy-Re-Encryption. - Yutaka Kawai; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2013)

Predicate- and Attribute-Hiding Inner Product Encryption in a Public Key Setting. - Yutaka Kawai; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2013)

Efficient (Hierarchical) Inner-Product Encryption Tightly Reduced from the Decisional Linear Assumption. - Tatsuaki Okamoto; Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Computing a Sequence of 2-Isogenies on Supersingular Elliptic Curves. - Reo Yoshida; Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Recent Topics on Practical Functional Encryption. - Katsuyuki Takashima (CANDAR, 2014)

Heuristic counting of Kachisa-Schaefer-Scott curves. - Yutaro Kiyomura; Noriyasu Iwamoto; Shun'ichi Yokoyama; Kenichiro Hayasaka; Yuntao Wang 002; Takanori Yasuda; Katsuyuki Takashima; Tsuyoshi Takagi (JSIAM Lett., 2014)

Achieving short ciphertexts or short secret-keys for adaptively secure general inner-product encryption. - Tatsuaki Okamoto; Katsuyuki Takashima (Des. Codes Cryptogr., 2015)

New Proof Techniques for DLIN-Based Adaptively Secure Attribute-Based Encryption and Their Application. - Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2015)

Tighter Security for Efficient Lattice Cryptography via the Rényi Divergence of Optimized Orders. - Katsuyuki Takashima; Atsushi Takayasu (IACR Cryptol. ePrint Arch., 2015)

Dual Pairing Vector Spaces and Their Applications. - Tatsuaki Okamoto; Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Pairing Cryptography Meets Isogeny: A New Framework of Isogenous Pairing Groups. - Takeshi Koshiba; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2016)

Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. - Tatsuaki Okamoto; Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016)

Efficient Algorithms for Isogeny Sequences and Their Cryptographic Applications. - Katsuyuki Takashima (CREST Crypto-Math Project, 2017)

New Proof Techniques for DLIN-Based Adaptively Secure Attribute-Based Encryption. - Katsuyuki Takashima (ACISP (1), 2017)

Constructing an efficient hash function from $3$-isogenies. - Hikari Tachibana; Katsuyuki Takashima; Tsuyoshi Takagi (JSIAM Lett., 2017)

New Assumptions on Isogenous Pairing Groups with Applications to Attribute-Based Encryption. - Takeshi Koshiba; Katsuyuki Takashima (ICISC, 2018)

Multi-party Key Exchange Protocols from Supersingular Isogenies. - Satoshi Furukawa; Noboru Kunihiro; Katsuyuki Takashima (ISITA, 2018)

Supersingular Isogeny Diffie-Hellman Authenticated Key Exchange. - Atsushi Fujioka; Katsuyuki Takashima; Shintaro Terada; Kazuki Yoneyama (IACR Cryptol. ePrint Arch., 2018)

One-Round Authenticated Group Key Exchange from Isogenies. - Atsushi Fujioka; Katsuyuki Takashima; Kazuki Yoneyama (IACR Cryptol. ePrint Arch., 2018)

Unbounded Inner Product Functional Encryption from Bilinear Maps. - Junichi Tomida; Katsuyuki Takashima (IACR Cryptol. ePrint Arch., 2018)

Group Key Exchange from CSIDH and Its Application to Trusted Setup in Supersingular Isogeny Cryptosystems. - Tomoki Moriya; Katsuyuki Takashima; Tsuyoshi Takagi (Inscrypt, 2019)

Fully Secure Functional Encryption with a Large Class of Relations from the Decisional Linear Assumption. - Tatsuaki Okamoto; Katsuyuki Takashima (J. Cryptol., 2019)

Hybrid Meet-in-the-Middle Attacks for the Isogeny Path-Finding Problem. - Yasuhiko Ikematsu; Ryoya Fukasaku; Momonari Kudo; Masaya Yasuda; Katsuyuki Takashima; Kazuhiro Yokoyama (APKC@AsiaCCS, 2020)

Counting superspecial Richelot isogenies and its cryptographic application. - Toshiyuki Katsura; Katsuyuki Takashima (CoRR, 2020)

An Efficient Authenticated Key Exchange from Random Self-Reducibility on CSIDH. - Tomoki Kawashima; Katsuyuki Takashima; Yusuke Aikawa; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 2020)

Decentralized Attribute-Based Encryption and Signatures. - Tatsuaki Okamoto; Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Expressive Attribute-Based Encryption with Constant-Size Ciphertexts from the Decisional Linear Assumption. - Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. - Pratish Datta; Tatsuaki Okamoto; Katsuyuki Takashima (IEICE Trans. Inf. Syst., 2020)

Implementation Report of the Kohel-Lauter-Petit-Tignol Algorithm for the Constructive Deuring Correspondence. - Yuta Kambe; Yusuke Aikawa; Momonari Kudo; Masaya Yasuda; Katsuyuki Takashima; Kazuhiro Yokoyama (ICMC, 2021)

Decomposed Richelot isogenies of Jacobian varieties of hyperelliptic curves and generalized Howe curves. - Toshiyuki Katsura; Katsuyuki Takashima (CoRR, 2021)

Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. - Pratish Datta; Tatsuaki Okamoto; Katsuyuki Takashima (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Improved supersingularity testing of elliptic curves. - Yuji Hashimoto; Katsuyuki Takashima (JSIAM Lett., 2021)

Compact FE for unbounded attribute-weighted sums for logspace from SXDH. - Pratish Datta; Tapas Pal; Katsuyuki Takashima (Des. Codes Cryptogr., 2024)

On Lattice Isomorphism Problems for Lattices from LCD Codes over Finite Rings. - Yusaku Nishimura; Katsuyuki Takashima; Tsuyoshi Miezaki (CoRR, 2025)