Katsuyuki Takashima

77 papers A* 3A 2B 1C 5Misc 8Journal 45Unranked 12
YearRankTypeTitle / Venue / Authors
2026 J jnl
A New Approach to Code Smoothing Bounds.
CoRR
Tsuyoshi Miezaki, Yusaku Nishimura, Katsuyuki Takashima
2026 J jnl
On Lattice Isomorphism Problems for Lattices from LCD Codes over Finite Rings.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yusaku Nishimura, Katsuyuki Takashima, Tsuyoshi Miezaki
2025 J jnl
On Lattice Isomorphism Problems for Lattices from LCD Codes over Finite Rings.
CoRR
Yusaku Nishimura, Katsuyuki Takashima, Tsuyoshi Miezaki
2024 J jnl
Compact FE for unbounded attribute-weighted sums for logspace from SXDH.
Des. Codes Cryptogr.
Pratish Datta, Tapas Pal, Katsuyuki Takashima
2022 — conf
Compact FE for Unbounded Attribute-Weighted Sums for Logspace from SXDH.
ASIACRYPT (1)
Pratish Datta, Tapas Pal, Katsuyuki Takashima
2022 J jnl
Compact FE for Unbounded Attribute-Weighted Sums for Logspace from SXDH.
IACR Cryptol. ePrint Arch.
Pratish Datta, Tapas Pal, Katsuyuki Takashima
2021 J jnl
Decomposed Richelot isogenies of Jacobian varieties of hyperelliptic curves and generalized Howe curves.
CoRR
Toshiyuki Katsura, Katsuyuki Takashima
2021 J jnl
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
2021 — conf
Implementation Report of the Kohel-Lauter-Petit-Tignol Algorithm for the Constructive Deuring Correspondence.
ICMC
Yuta Kambe, Yusuke Aikawa, Momonari Kudo, Masaya Yasuda, Katsuyuki Takashima, Kazuhiro Yokoyama
2021 J jnl
Improved supersingularity testing of elliptic curves.
JSIAM Lett.
Yuji Hashimoto, Katsuyuki Takashima
2020 J jnl
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption.
IEICE Trans. Inf. Syst.
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
2020 J jnl
An Efficient Authenticated Key Exchange from Random Self-Reducibility on CSIDH.
IACR Cryptol. ePrint Arch.
Tomoki Kawashima, Katsuyuki Takashima, Yusuke Aikawa, Tsuyoshi Takagi
2020 Misc conf
An Efficient Authenticated Key Exchange from Random Self-reducibility on CSIDH.
ICISC
Tomoki Kawashima, Katsuyuki Takashima, Yusuke Aikawa, Tsuyoshi Takagi
2020 J jnl
Counting superspecial Richelot isogenies and its cryptographic application.
CoRR
Toshiyuki Katsura, Katsuyuki Takashima
2020 J jnl
Decentralized Attribute-Based Encryption and Signatures.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Tatsuaki Okamoto, Katsuyuki Takashima
2020 J jnl
Expressive Attribute-Based Encryption with Constant-Size Ciphertexts from the Decisional Linear Assumption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Katsuyuki Takashima
2020 — conf
Hybrid Meet-in-the-Middle Attacks for the Isogeny Path-Finding Problem.
APKC@AsiaCCS
Yasuhiko Ikematsu, Ryoya Fukasaku, Momonari Kudo, Masaya Yasuda, Katsuyuki Takashima, Kazuhiro Yokoyama
2019 — conf
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs.
Public Key Cryptography (1)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
2019 J jnl
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs.
IACR Cryptol. ePrint Arch.
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
2019 J jnl
Fully Secure Functional Encryption with a Large Class of Relations from the Decisional Linear Assumption.
J. Cryptol.
Tatsuaki Okamoto, Katsuyuki Takashima
2019 Misc conf
Group Key Exchange from CSIDH and Its Application to Trusted Setup in Supersingular Isogeny Cryptosystems.
Inscrypt
Tomoki Moriya, Katsuyuki Takashima, Tsuyoshi Takagi
2019 C conf
One-Round Authenticated Group Key Exchange from Isogenies.
ProvSec
Atsushi Fujioka, Katsuyuki Takashima, Kazuki Yoneyama
2018 — conf
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption.
ASIACRYPT (2)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
2018 J jnl
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption.
IACR Cryptol. ePrint Arch.
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
2018 C conf
Multi-party Key Exchange Protocols from Supersingular Isogenies.
ISITA
Satoshi Furukawa, Noboru Kunihiro, Katsuyuki Takashima
2018 Misc conf
New Assumptions on Isogenous Pairing Groups with Applications to Attribute-Based Encryption.
ICISC
Takeshi Koshiba, Katsuyuki Takashima
2018 J jnl
One-Round Authenticated Group Key Exchange from Isogenies.
IACR Cryptol. ePrint Arch.
Atsushi Fujioka, Katsuyuki Takashima, Kazuki Yoneyama
2018 Misc conf
Supersingular Isogeny Diffie-Hellman Authenticated Key Exchange.
ICISC
Atsushi Fujioka, Katsuyuki Takashima, Shintaro Terada, Kazuki Yoneyama
2018 J jnl
Supersingular Isogeny Diffie-Hellman Authenticated Key Exchange.
IACR Cryptol. ePrint Arch.
Atsushi Fujioka, Katsuyuki Takashima, Shintaro Terada, Kazuki Yoneyama
2018 — conf
Unbounded Inner Product Functional Encryption from Bilinear Maps.
ASIACRYPT (2)
Junichi Tomida, Katsuyuki Takashima
2018 J jnl
Unbounded Inner Product Functional Encryption from Bilinear Maps.
IACR Cryptol. ePrint Arch.
Junichi Tomida, Katsuyuki Takashima
2017 J jnl
Constructing an efficient hash function from $3$-isogenies.
JSIAM Lett.
Hikari Tachibana, Katsuyuki Takashima, Tsuyoshi Takagi
2017 — ch.
Efficient Algorithms for Isogeny Sequences and Their Cryptographic Applications.
CREST Crypto-Math Project
Katsuyuki Takashima
2017 — conf
New Proof Techniques for DLIN-Based Adaptively Secure Attribute-Based Encryption.
ACISP (1)
Katsuyuki Takashima
2016 J jnl
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Tatsuaki Okamoto, Katsuyuki Takashima
2016 J jnl
Pairing Cryptography Meets Isogeny: A New Framework of Isogenous Pairing Groups.
IACR Cryptol. ePrint Arch.
Takeshi Koshiba, Katsuyuki Takashima
2015 J jnl
Achieving short ciphertexts or short secret-keys for adaptively secure general inner-product encryption.
Des. Codes Cryptogr.
Tatsuaki Okamoto, Katsuyuki Takashima
2015 J jnl
Dual Pairing Vector Spaces and Their Applications.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Tatsuaki Okamoto, Katsuyuki Takashima
2015 J jnl
New Proof Techniques for DLIN-Based Adaptively Secure Attribute-Based Encryption and Their Application.
IACR Cryptol. ePrint Arch.
Katsuyuki Takashima
2015 C conf
Tighter Security for Efficient Lattice Cryptography via the Rényi Divergence of Optimized Orders.
ProvSec
Katsuyuki Takashima, Atsushi Takayasu
2015 J jnl
Tighter Security for Efficient Lattice Cryptography via the Rényi Divergence of Optimized Orders.
IACR Cryptol. ePrint Arch.
Katsuyuki Takashima, Atsushi Takayasu
2014 J jnl
Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model.
IEEE Trans. Cloud Comput.
Tatsuaki Okamoto, Katsuyuki Takashima
2014 Misc conf
Expressive Attribute-Based Encryption with Constant-Size Ciphertexts from the Decisional Linear Assumption.
SCN
Katsuyuki Takashima
2014 J jnl
Expressive Attribute-Based Encryption with Constant-Size Ciphertexts from the Decisional Linear Assumption.
IACR Cryptol. ePrint Arch.
Katsuyuki Takashima
2014 J jnl
Heuristic counting of Kachisa-Schaefer-Scott curves.
JSIAM Lett.
Yutaro Kiyomura, Noriyasu Iwamoto, Shun'ichi Yokoyama, Kenichiro Hayasaka, Yuntao Wang, Takanori Yasuda, Katsuyuki Takashima, Tsuyoshi Takagi
2014 — conf
Recent Topics on Practical Functional Encryption.
CANDAR
Katsuyuki Takashima
2013 J jnl
Computing a Sequence of 2-Isogenies on Supersingular Elliptic Curves.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Reo Yoshida, Katsuyuki Takashima
2013 — conf
Decentralized Attribute-Based Signatures.
Public Key Cryptography
Tatsuaki Okamoto, Katsuyuki Takashima
2013 J jnl
Efficient (Hierarchical) Inner-Product Encryption Tightly Reduced from the Decisional Linear Assumption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Tatsuaki Okamoto, Katsuyuki Takashima
2013 J jnl
Fully-Anonymous Functional Proxy-Re-Encryption.
IACR Cryptol. ePrint Arch.
Yutaka Kawai, Katsuyuki Takashima
2013 C conf
Predicate- and Attribute-Hiding Inner Product Encryption in a Public Key Setting.
Pairing
Yutaka Kawai, Katsuyuki Takashima
2013 J jnl
Predicate- and Attribute-Hiding Inner Product Encryption in a Public Key Setting.
IACR Cryptol. ePrint Arch.
Yutaka Kawai, Katsuyuki Takashima
2012 A* conf
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption.
EUROCRYPT
Tatsuaki Okamoto, Katsuyuki Takashima
2012 A conf
Fully Secure Unbounded Inner-Product and Attribute-Based Encryption.
ASIACRYPT
Tatsuaki Okamoto, Katsuyuki Takashima
2012 J jnl
Fully Secure Unbounded Inner-Product and Attribute-Based Encryption.
IACR Cryptol. ePrint Arch.
Tatsuaki Okamoto, Katsuyuki Takashima
2012 J jnl
Provably-Secure Cancelable Biometrics Using 2-DNF Evaluation.
Inf. Media Technol.
Mitsuhiro Hattori, Nori Matsuda, Takashi Ito, Yoichi Shibata, Katsuyuki Takashima, Takeshi Yoneda
2012 J jnl
Provably-Secure Cancelable Biometrics Using 2-DNF Evaluation.
J. Inf. Process.
Mitsuhiro Hattori, Nori Matsuda, Takashi Ito, Yoichi Shibata, Katsuyuki Takashima, Takeshi Yoneda
2011 B conf
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption.
CANS
Tatsuaki Okamoto, Katsuyuki Takashima
2011 J jnl
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption.
IACR Cryptol. ePrint Arch.
Tatsuaki Okamoto, Katsuyuki Takashima
2011 J jnl
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption.
IACR Cryptol. ePrint Arch.
Tatsuaki Okamoto, Katsuyuki Takashima
2011 J jnl
Decentralized Attribute-Based Signatures.
IACR Cryptol. ePrint Arch.
Tatsuaki Okamoto, Katsuyuki Takashima
2011 J jnl
Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model.
IACR Cryptol. ePrint Arch.
Tatsuaki Okamoto, Katsuyuki Takashima
2011 — conf
Efficient Attribute-Based Signatures for Non-monotone Predicates in the Standard Model.
Public Key Cryptography
Tatsuaki Okamoto, Katsuyuki Takashima
2011 — conf
Some Key Techniques on Pairing Vector Spaces.
AFRICACRYPT
Tatsuaki Okamoto, Katsuyuki Takashima
2010 A* conf
Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption.
CRYPTO
Tatsuaki Okamoto, Katsuyuki Takashima
2010 J jnl
Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption.
IACR Cryptol. ePrint Arch.
Tatsuaki Okamoto, Katsuyuki Takashima
2010 A* conf
Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption.
EUROCRYPT
Allison B. Lewko, Tatsuaki Okamoto, Amit Sahai, Katsuyuki Takashima, Brent Waters
2010 J jnl
Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption.
IACR Cryptol. ePrint Arch.
Allison B. Lewko, Tatsuaki Okamoto, Amit Sahai, Katsuyuki Takashima, Brent Waters
2009 A conf
Hierarchical Predicate Encryption for Inner-Products.
ASIACRYPT
Tatsuaki Okamoto, Katsuyuki Takashima
2008 — conf
Efficiently Computable Distortion Maps for Supersingular Curves.
ANTS
Katsuyuki Takashima
2008 C conf
Homomorphic Encryption and Signatures from Vector Decomposition.
Pairing
Tatsuaki Okamoto, Katsuyuki Takashima
2008 Misc conf
Simple Algorithms for Computing a Sequence of 2-Isogenies.
ICISC
Reo Yoshida, Katsuyuki Takashima
2007 J jnl
Scaling Security of Elliptic Curves with Fast Pairing Using Efficient Endomorphisms.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Katsuyuki Takashima
2006 J jnl
A New Type of Fast Endomorphisms on Jacobians of Hyperelliptic Curves and Their Cryptographic Application.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Katsuyuki Takashima
2006 J jnl
Practical Application of Lattice Basis Reduction Algorithm to Side-Channel Analysis on (EC)DSA.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Katsuyuki Takashima
2005 Misc conf
Practical Modifications of Leadbitter et al.'s Repeated-Bits Side-Channel Analysis on (EC)DSA.
WISA
Katsuyuki Takashima
2004 Misc conf
New Families of Hyperelliptic Curves with Efficient Gallant-Lambert-Vanstone Method.
ICISC
Katsuyuki Takashima