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ORCIDKatsuyuki Takashima
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2020 – today
- 2024
[j20]Pratish Datta, Tapas Pal
, Katsuyuki Takashima:
Compact FE for unbounded attribute-weighted sums for logspace from SXDH. Des. Codes Cryptogr. 92(10): 3155-3235 (2024)- 2022
- [c31]Pratish Datta, Tapas Pal, Katsuyuki Takashima:
Compact FE for Unbounded Attribute-Weighted Sums for Logspace from SXDH. ASIACRYPT (1) 2022: 126-159 - [i22]Pratish Datta, Tapas Pal, Katsuyuki Takashima:
Compact FE for Unbounded Attribute-Weighted Sums for Logspace from SXDH. IACR Cryptol. ePrint Arch. 2022: 1594 (2022) - 2021
- [j19]Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima:
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 104-A(1): 25-57 (2021) - [j18]Yuji Hashimoto, Katsuyuki Takashima:
Improved supersingularity testing of elliptic curves. JSIAM Lett. 13: 29-32 (2021) - [c30]Yuta Kambe, Yusuke Aikawa, Momonari Kudo, Masaya Yasuda, Katsuyuki Takashima, Kazuhiro Yokoyama:
Implementation Report of the Kohel-Lauter-Petit-Tignol Algorithm for the Constructive Deuring Correspondence. ICMC 2021: 953-966 - [i21]Toshiyuki Katsura, Katsuyuki Takashima:
Decomposed Richelot isogenies of Jacobian varieties of hyperelliptic curves and generalized Howe curves. CoRR abs/2108.06936 (2021) - 2020
- [j17]Tatsuaki Okamoto, Katsuyuki Takashima:
Decentralized Attribute-Based Encryption and Signatures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 103-A(1): 41-73 (2020) - [j16]Katsuyuki Takashima:
Expressive Attribute-Based Encryption with Constant-Size Ciphertexts from the Decisional Linear Assumption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 103-A(1): 74-106 (2020) - [j15]Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima:
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. IEICE Trans. Inf. Syst. 103-D(7): 1556-1597 (2020) - [c29]Yasuhiko Ikematsu, Ryoya Fukasaku, Momonari Kudo, Masaya Yasuda, Katsuyuki Takashima, Kazuhiro Yokoyama:
Hybrid Meet-in-the-Middle Attacks for the Isogeny Path-Finding Problem. APKC@AsiaCCS 2020: 36-44 - [c28]Tomoki Kawashima, Katsuyuki Takashima, Yusuke Aikawa, Tsuyoshi Takagi:
An Efficient Authenticated Key Exchange from Random Self-reducibility on CSIDH. ICISC 2020: 58-84 - [i20]Toshiyuki Katsura, Katsuyuki Takashima:
Counting superspecial Richelot isogenies and its cryptographic application. CoRR abs/2003.00633 (2020) - [i19]Tomoki Kawashima, Katsuyuki Takashima, Yusuke Aikawa, Tsuyoshi Takagi:
An Efficient Authenticated Key Exchange from Random Self-Reducibility on CSIDH. IACR Cryptol. ePrint Arch. 2020: 1178 (2020)
2010 – 2019
- 2019
- [j14]Tatsuaki Okamoto, Katsuyuki Takashima:
Fully Secure Functional Encryption with a Large Class of Relations from the Decisional Linear Assumption. J. Cryptol. 32(4): 1491-1573 (2019) - [c27]Tomoki Moriya, Katsuyuki Takashima, Tsuyoshi Takagi:
Group Key Exchange from CSIDH and Its Application to Trusted Setup in Supersingular Isogeny Cryptosystems. Inscrypt 2019: 86-98 - [c26]Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima:
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. Public Key Cryptography (1) 2019: 127-158 - [c25]Atsushi Fujioka, Katsuyuki Takashima, Kazuki Yoneyama:
One-Round Authenticated Group Key Exchange from Isogenies. ProvSec 2019: 330-338 - [i18]Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima:
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. IACR Cryptol. ePrint Arch. 2019: 363 (2019) - 2018
- [c24]Junichi Tomida, Katsuyuki Takashima:
Unbounded Inner Product Functional Encryption from Bilinear Maps. ASIACRYPT (2) 2018: 609-639 - [c23]Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima:
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. ASIACRYPT (2) 2018: 640-672 - [c22]Takeshi Koshiba, Katsuyuki Takashima:
New Assumptions on Isogenous Pairing Groups with Applications to Attribute-Based Encryption. ICISC 2018: 3-19 - [c21]Atsushi Fujioka, Katsuyuki Takashima, Shintaro Terada, Kazuki Yoneyama:
Supersingular Isogeny Diffie-Hellman Authenticated Key Exchange. ICISC 2018: 177-195 - [c20]Satoshi Furukawa, Noboru Kunihiro, Katsuyuki Takashima:
Multi-party Key Exchange Protocols from Supersingular Isogenies. ISITA 2018: 208-212 - [i17]Junichi Tomida, Katsuyuki Takashima:
Unbounded Inner Product Functional Encryption from Bilinear Maps. IACR Cryptol. ePrint Arch. 2018: 696 (2018) - [i16]Atsushi Fujioka, Katsuyuki Takashima, Shintaro Terada, Kazuki Yoneyama:
Supersingular Isogeny Diffie-Hellman Authenticated Key Exchange. IACR Cryptol. ePrint Arch. 2018: 730 (2018) - [i15]Atsushi Fujioka, Katsuyuki Takashima, Kazuki Yoneyama:
One-Round Authenticated Group Key Exchange from Isogenies. IACR Cryptol. ePrint Arch. 2018: 1033 (2018) - [i14]Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima:
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. IACR Cryptol. ePrint Arch. 2018: 1093 (2018) - 2017
- [j13]Hikari Tachibana, Katsuyuki Takashima, Tsuyoshi Takagi:
Constructing an efficient hash function from $3$-isogenies. JSIAM Lett. 9: 29-32 (2017) - [c19]Katsuyuki Takashima:
New Proof Techniques for DLIN-Based Adaptively Secure Attribute-Based Encryption. ACISP (1) 2017: 85-105 - [p1]Katsuyuki Takashima:
Efficient Algorithms for Isogeny Sequences and Their Cryptographic Applications. CREST Crypto-Math Project 2017: 97-114 - 2016
- [j12]Tatsuaki Okamoto, Katsuyuki Takashima:
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 99-A(1): 92-117 (2016) - [i13]Takeshi Koshiba, Katsuyuki Takashima:
Pairing Cryptography Meets Isogeny: A New Framework of Isogenous Pairing Groups. IACR Cryptol. ePrint Arch. 2016: 1138 (2016) - 2015
- [j11]Tatsuaki Okamoto, Katsuyuki Takashima:
Achieving short ciphertexts or short secret-keys for adaptively secure general inner-product encryption. Des. Codes Cryptogr. 77(2-3): 725-771 (2015) - [j10]Tatsuaki Okamoto, Katsuyuki Takashima:
Dual Pairing Vector Spaces and Their Applications. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 98-A(1): 3-15 (2015) - [c18]Katsuyuki Takashima, Atsushi Takayasu:
Tighter Security for Efficient Lattice Cryptography via the Rényi Divergence of Optimized Orders. ProvSec 2015: 412-431 - [i12]Katsuyuki Takashima:
New Proof Techniques for DLIN-Based Adaptively Secure Attribute-Based Encryption and Their Application. IACR Cryptol. ePrint Arch. 2015: 1021 (2015) - [i11]Katsuyuki Takashima, Atsushi Takayasu:
Tighter Security for Efficient Lattice Cryptography via the Rényi Divergence of Optimized Orders. IACR Cryptol. ePrint Arch. 2015: 1132 (2015) - 2014
- [j9]Yutaro Kiyomura, Noriyasu Iwamoto, Shun'ichi Yokoyama, Kenichiro Hayasaka, Yuntao Wang, Takanori Yasuda, Katsuyuki Takashima, Tsuyoshi Takagi:
Heuristic counting of Kachisa-Schaefer-Scott curves. JSIAM Lett. 6: 73-76 (2014) - [j8]Tatsuaki Okamoto, Katsuyuki Takashima:
Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model. IEEE Trans. Cloud Comput. 2(4): 409-421 (2014) - [c17]Katsuyuki Takashima:
Recent Topics on Practical Functional Encryption. CANDAR 2014: 21-27 - [c16]Katsuyuki Takashima:
Expressive Attribute-Based Encryption with Constant-Size Ciphertexts from the Decisional Linear Assumption. SCN 2014: 298-317 - [i10]Katsuyuki Takashima:
Expressive Attribute-Based Encryption with Constant-Size Ciphertexts from the Decisional Linear Assumption. IACR Cryptol. ePrint Arch. 2014: 207 (2014) - 2013
- [j7]Tatsuaki Okamoto, Katsuyuki Takashima:
Efficient (Hierarchical) Inner-Product Encryption Tightly Reduced from the Decisional Linear Assumption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 96-A(1): 42-52 (2013) - [j6]Reo Yoshida, Katsuyuki Takashima:
Computing a Sequence of 2-Isogenies on Supersingular Elliptic Curves. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 96-A(1): 158-165 (2013) - [c15]Yutaka Kawai, Katsuyuki Takashima:
Predicate- and Attribute-Hiding Inner Product Encryption in a Public Key Setting. Pairing 2013: 113-130 - [c14]Tatsuaki Okamoto, Katsuyuki Takashima:
Decentralized Attribute-Based Signatures. Public Key Cryptography 2013: 125-142 - [i9]Yutaka Kawai, Katsuyuki Takashima:
Fully-Anonymous Functional Proxy-Re-Encryption. IACR Cryptol. ePrint Arch. 2013: 318 (2013) - [i8]Yutaka Kawai, Katsuyuki Takashima:
Predicate- and Attribute-Hiding Inner Product Encryption in a Public Key Setting. IACR Cryptol. ePrint Arch. 2013: 763 (2013) - 2012
- [j5]Mitsuhiro Hattori, Nori Matsuda, Takashi Ito, Yoichi Shibata, Katsuyuki Takashima, Takeshi Yoneda:
Provably-Secure Cancelable Biometrics Using 2-DNF Evaluation. Inf. Media Technol. 7(2): 749-760 (2012) - [j4]Mitsuhiro Hattori, Nori Matsuda, Takashi Ito, Yoichi Shibata, Katsuyuki Takashima, Takeshi Yoneda:
Provably-Secure Cancelable Biometrics Using 2-DNF Evaluation. J. Inf. Process. 20(2): 496-507 (2012) - [c13]Tatsuaki Okamoto, Katsuyuki Takashima:
Fully Secure Unbounded Inner-Product and Attribute-Based Encryption. ASIACRYPT 2012: 349-366 - [c12]Tatsuaki Okamoto, Katsuyuki Takashima:
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. EUROCRYPT 2012: 591-608 - [i7]Tatsuaki Okamoto, Katsuyuki Takashima:
Fully Secure Unbounded Inner-Product and Attribute-Based Encryption. IACR Cryptol. ePrint Arch. 2012: 671 (2012) - 2011
- [c11]Tatsuaki Okamoto, Katsuyuki Takashima:
Some Key Techniques on Pairing Vector Spaces. AFRICACRYPT 2011: 380-382 - [c10]Tatsuaki Okamoto, Katsuyuki Takashima:
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption. CANS 2011: 138-159 - [c9]Tatsuaki Okamoto, Katsuyuki Takashima:
Efficient Attribute-Based Signatures for Non-monotone Predicates in the Standard Model. Public Key Cryptography 2011: 35-52 - [i6]Tatsuaki Okamoto, Katsuyuki Takashima:
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. IACR Cryptol. ePrint Arch. 2011: 543 (2011) - [i5]Tatsuaki Okamoto, Katsuyuki Takashima:
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption. IACR Cryptol. ePrint Arch. 2011: 648 (2011) - [i4]Tatsuaki Okamoto, Katsuyuki Takashima:
Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model. IACR Cryptol. ePrint Arch. 2011: 700 (2011) - [i3]Tatsuaki Okamoto, Katsuyuki Takashima:
Decentralized Attribute-Based Signatures. IACR Cryptol. ePrint Arch. 2011: 701 (2011) - 2010
- [c8]Tatsuaki Okamoto, Katsuyuki Takashima:
Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption. CRYPTO 2010: 191-208 - [c7]Allison B. Lewko, Tatsuaki Okamoto, Amit Sahai, Katsuyuki Takashima, Brent Waters:
Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption. EUROCRYPT 2010: 62-91 - [i2]Allison B. Lewko, Tatsuaki Okamoto, Amit Sahai, Katsuyuki Takashima, Brent Waters:
Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption. IACR Cryptol. ePrint Arch. 2010: 110 (2010) - [i1]Tatsuaki Okamoto, Katsuyuki Takashima:
Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption. IACR Cryptol. ePrint Arch. 2010: 563 (2010)
2000 – 2009
- 2009
- [c6]Tatsuaki Okamoto, Katsuyuki Takashima:
Hierarchical Predicate Encryption for Inner-Products. ASIACRYPT 2009: 214-231 - 2008
- [c5]Katsuyuki Takashima:
Efficiently Computable Distortion Maps for Supersingular Curves. ANTS 2008: 88-101 - [c4]Reo Yoshida, Katsuyuki Takashima:
Simple Algorithms for Computing a Sequence of 2-Isogenies. ICISC 2008: 52-65 - [c3]Tatsuaki Okamoto, Katsuyuki Takashima:
Homomorphic Encryption and Signatures from Vector Decomposition. Pairing 2008: 57-74 - 2007
- [j3]Katsuyuki Takashima:
Scaling Security of Elliptic Curves with Fast Pairing Using Efficient Endomorphisms. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 90-A(1): 152-159 (2007) - 2006
- [j2]Katsuyuki Takashima:
A New Type of Fast Endomorphisms on Jacobians of Hyperelliptic Curves and Their Cryptographic Application. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 89-A(1): 124-133 (2006) - [j1]Katsuyuki Takashima:
Practical Application of Lattice Basis Reduction Algorithm to Side-Channel Analysis on (EC)DSA. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 89-A(5): 1255-1262 (2006) - 2005
- [c2]Katsuyuki Takashima:
Practical Modifications of Leadbitter et al.'s Repeated-Bits Side-Channel Analysis on (EC)DSA. WISA 2005: 259-270 - 2004
- [c1]Katsuyuki Takashima:
New Families of Hyperelliptic Curves with Efficient Gallant-Lambert-Vanstone Method. ICISC 2004: 279-295
Coauthor Index
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