| 2026 | ACISP | Threshold FHE with Short Decryption Shares Without a Semi-trusted Server. | Hiroki Okada, Tsuyoshi Takagi |
| 2026 | ICISSP | Revisiting ISD Algorithms and New Decoding Records for Large Weight Syndrome Decoding over F q. | Takeshi Wakao, Yusuke Aikawa, Shintaro Narisada, Tsuyoshi Takagi |
| 2026 | WAIFI | On the Feasibility of 256-Bit Prime Field Arithmetic via PMNS on 8-Bit Architectures. | Daichi Aoki, Tsuyoshi Takagi |
| 2026 | WAIFI | Explicit Bounds on the Existence Probability of Random Multivariate Quadratic Systems over Finite Fields. | Michiya Iwata, Ryomei Sugai, Kosuke Sakata, Tsuyoshi Takagi |
| 2025 | ASIACRYPT | Low Communication Threshold FHE from Standard (Module-)LWE. | Hiroki Okada, Tsuyoshi Takagi |
| 2025 | CASC | Lower Bounds of Costs of 3-Isogenies Formulas in the Framework of Generalized Montgomery Coordinates. | Tomoki Moriya, Hiroshi Onuki, Yusuke Aikawa, Tsuyoshi Takagi |
| 2025 | ICISSP | Gram Root Decomposition over the Polynomial Ring: Application to Sphericalization of Discrete Gaussian. | Hiroki Okada, Tsuyoshi Takagi |
| 2024 | ACISP | Revisiting the Security of Fiat-Shamir Signature Schemes Under Superposition Attacks. | Quan Yuan, Chao Sun, Tsuyoshi Takagi |
| 2024 | ESORICS | Review the Cuckoo Hash-Based Unbalanced Private Set Union: Leakage, Fix, and Optimization. | Keyang Liu, Xingxin Li, Tsuyoshi Takagi |
| 2024 | IWSEC | Sieving Method for SDP with the Zero Window: An Improvement in Low Memory Environments. | Naoki Yoshiguchi, Yusuke Aikawa, Tsuyoshi Takagi |
| 2024 | ProvSec | Consecutive Adaptor Signature Scheme: From Two-Party to N-Party Settings. | Kaisei Kajita, Go Ohtake, Tsuyoshi Takagi |
| 2024 | ProvSec | Tightly Secure Identity-Based Signature from Cryptographic Group Actions. | Thanh Xuan Khuc, Willy Susilo, Dung Hoang Duong, Fuchun Guo, Hyungrok Jo, Tsuyoshi Takagi |
| 2023 | ACISP | Memory-Efficient Quantum Information Set Decoding Algorithm. | Naoto Kimura, Atsushi Takayasu, Tsuyoshi Takagi |
| 2023 | ACNS | Spherical Gaussian Leftover Hash Lemma via the Rnyi Divergence. | Hiroki Okada, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi |
| 2023 | IWSEC | Improved Hybrid Attack via Error-Splitting Method for Finding Quinary Short Lattice Vectors. | Haiming Zhu, Shoichi Kamada, Momonari Kudo, Tsuyoshi Takagi |
| 2023 | PQCrypto | Fast Enumeration Algorithm for Multivariate Polynomials over General Finite Fields. | Hiroki Furue, Tsuyoshi Takagi |
| 2022 | ARITH | Efficient Word Size Modular Multiplication over Signed Integers. | Daichi Aoki, Kazuhiko Minematsu, Toshihiko Okamura, Tsuyoshi Takagi |
| 2022 | IWSEC | Improving Fault Attacks on Rainbow with Fixing Random Vinegar Values. | Taku Kato, Yutaro Kiyomura, Tsuyoshi Takagi |
| 2022 | PQCrypto | A New Fault Attack on UOV Multivariate Signature Scheme. | Hiroki Furue, Yutaro Kiyomura, Tatsuya Nagasawa, Tsuyoshi Takagi |
| 2021 | ASIACRYPT | A New Variant of Unbalanced Oil and Vinegar Using Quotient Ring: QR-UOV. | Hiroki Furue, Yasuhiko Ikematsu, Yutaro Kiyomura, Tsuyoshi Takagi |
| 2021 | IWSEC | Shortest Vectors in Lattices of Bai-Galbraith's Embedding Attack on the LWR Problem. | Shusaku Uemura, Kazuhide Fukushima, Shinsaku Kiyomoto, Momonari Kudo, Tsuyoshi Takagi |
| 2021 | IWSEC | (Short Paper) Simple Matrix Signature Scheme. | Changze Yin, Yacheng Wang, Tsuyoshi Takagi |
| 2021 | PQCrypto | Improving Thomae-Wolf Algorithm for Solving Underdetermined Multivariate Quadratic Polynomial Problem. | Hiroki Furue, Shuhei Nakamura, Tsuyoshi Takagi |
| 2020 | ACISP | Improving Key Mismatch Attack on NewHope with Fewer Queries. | Satoshi Okada, Yuntao Wang, Tsuyoshi Takagi |
| 2020 | ASIACRYPT | SiGamal: A Supersingular Isogeny-Based PKE and Its Application to a PRF. | Tomoki Moriya, Hiroshi Onuki, Tsuyoshi Takagi |
| 2020 | CCS | Cryptanalysis of GiophantusTM Schemes against Hybrid Attack. | Yuntao Wang, Yasuhiko Ikematsu, Koichiro Akiyama, Tsuyoshi Takagi |
| 2020 | ICICS | A Compact Digital Signature Scheme Based on the Module-LWR Problem. | Hiroki Okada, Atsushi Takayasu, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi |
| 2020 | ICISC | An Efficient Authenticated Key Exchange from Random Self-reducibility on CSIDH. | Tomoki Kawashima, Katsuyuki Takashima, Yusuke Aikawa, Tsuyoshi Takagi |
| 2020 | ISITA | The Existence of Cycles in the Supersingular Isogeny Graphs Used in SIKE. | Hiroshi Onuki, Yusuke Aikawa, Tsuyoshi Takagi |
| 2020 | IWSEC | On Collisions Related to an Ideal Class of Order 3 in CSIDH. | Hiroshi Onuki, Tsuyoshi Takagi |
| 2020 | PQCrypto | A Structural Attack on Block-Anti-Circulant UOV at SAC 2019. | Hiroki Furue, Koha Kinjo, Yasuhiko Ikematsu, Yacheng Wang, Tsuyoshi Takagi |
| 2020 | PQCrypto | Multivariate Encryption Schemes Based on Polynomial Equations over Real Numbers. | Takanori Yasuda, Yacheng Wang, Tsuyoshi Takagi |
| 2020 | ProvSec | Short Lattice Signatures in the Standard Model with Efficient Tag Generation. | Kaisei Kajita, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi |
| 2020 | WISA | Revisiting the Minrank Problem on Multivariate Cryptography. | Yacheng Wang, Yasuhiko Ikematsu, Shuhei Nakamura, Tsuyoshi Takagi |
| 2019 | ACNS | One Sample Ring-LWE with Rounding and Its Application to Key Exchange. | Jintai Ding, Xinwei Gao, Tsuyoshi Takagi, Yuntao Wang |
| 2019 | ICISSP | Security Analysis and Efficient Implementation of Code-based Signature Schemes. | Partha Sarathi Roy, Kirill Morozov, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi |
| 2019 | IWSEC | (Short Paper) A Faster Constant-Time Algorithm of CSIDH Keeping Two Points. | Hiroshi Onuki, Yusuke Aikawa, Tsutomu Yamazaki, Tsuyoshi Takagi |
| 2018 | ACISP | Efficient Decryption Algorithms for Extension Field Cancellation Type Encryption Schemes. | Yacheng Wang, Yasuhiko Ikematsu, Dung Hoang Duong, Tsuyoshi Takagi |
| 2018 | ACISP | Improving the BKZ Reduction Algorithm by Quick Reordering Technique. | Yuntao Wang, Tsuyoshi Takagi |
| 2018 | ICISC | On the Complexity of the LWR-Solving BKW Algorithm. | Hiroki Okada, Atsushi Takayasu, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi |
| 2018 | ISITA | An Improvement on the Linear Algebraic Attack for the Indeterminate Equation Encryption Scheme. | Yasuhiko Ikematsu, Koichiro Akiyama, Tsuyoshi Takagi |
| 2018 | IWSEC | Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 2017. | Yasufumi Hashimoto, Yasuhiko Ikematsu, Tsuyoshi Takagi |
| 2018 | IWSEC | Estimated Cost for Solving Generalized Learning with Errors Problem via Embedding Techniques. | Weiyao Wang, Yuntao Wang, Atsushi Takayasu, Tsuyoshi Takagi |
| 2018 | PQCrypto | HFERP - A New Multivariate Encryption Scheme. | Yasuhiko Ikematsu, Ray A. Perlner, Daniel Smith-Tone, Tsuyoshi Takagi, Jeremy Vates |
| 2017 | ACNS | Secure and Efficient Pairing at 256-Bit Security Level. | Yutaro Kiyomura, Akiko Inoue, Yuto Kawahara, Masaya Yasuda, Tsuyoshi Takagi, Tetsutaro Kobayashi |
| 2017 | ACNS | An Experimental Study of the BDD Approach for the Search LWE Problem. | Rui Xu, Sze Ling Yeo, Kazuhide Fukushima, Tsuyoshi Takagi, Hwajung Seo, Shinsaku Kiyomoto, Matt Henricksen |
| 2017 | ICICS | An Experimental Study of Kannan's Embedding Technique for the Search LWE Problem. | Yuntao Wang, Yoshinori Aono, Tsuyoshi Takagi |
| 2017 | IWSEC | The Beauty and the Beasts - The Hard Cases in LLL Reduction. | Saed Alsayigh, Jintai Ding, Tsuyoshi Takagi, Yuntao Wang |
| 2016 | ACISP | Reducing the Key Size of the SRP Encryption Scheme. | Dung Hoang Duong, Albrecht Petzoldt, Tsuyoshi Takagi |
| 2016 | ACISP | Privacy-Preserving k-Nearest Neighbour Query on Outsourced Database. | Rui Xu, Kirill Morozov, Yanjiang Yang, Jianying Zhou, Tsuyoshi Takagi |
| 2016 | EuroCrypt | Improved Progressive BKZ Algorithms and Their Precise Cost Estimation by Sharp Simulator. | Yoshinori Aono, Yuntao Wang, Takuya Hayashi, Tsuyoshi Takagi |
| 2016 | ICISC | Revisiting the Cubic UOV Signature Scheme. | Dung Hoang Duong, Albrecht Petzoldt, Yacheng Wang, Tsuyoshi Takagi |
| 2016 | IWSEC | Cryptanalysis of a Public Key Cryptosystem Based on Diophantine Equations via Weighted LLL Reduction. | Jintai Ding, Momonari Kudo, Shinya Okumura, Tsuyoshi Takagi, Chengdong Tao |
| 2014 | IWSEC | Cheater Identifiable Secret Sharing Schemes via Multi-Receiver Authentication. | Rui Xu, Kirill Morozov, Tsuyoshi Takagi |
| 2014 | PKC | Parallel Gauss Sieve Algorithm: Solving the SVP Challenge over a 128-Dimensional Ideal Lattice. | Tsukasa Ishiguro, Shinsaku Kiyomoto, Yutaka Miyake, Tsuyoshi Takagi |
| 2014 | PQCrypto | A Polynomial-Time Algorithm for Solving a Class of Underdetermined Multivariate Quadratic Equations over Fields of Odd Characteristics. | Chen-Mou Cheng, Yasufumi Hashimoto, Hiroyuki Miura, Tsuyoshi Takagi |
| 2013 | ACISP | Attacks on Multi-Prime RSA with Small Prime Difference. | Hui Zhang, Tsuyoshi Takagi |
| 2013 | CCS | Proof of plaintext knowledge for code-based public-key encryption revisited. | Rong Hu, Kirill Morozov, Tsuyoshi Takagi |
| 2013 | CCS | A variant of rainbow with shorter secret key and faster signature generation. | Takanori Yasuda, Jintai Ding, Tsuyoshi Takagi, Kouichi Sakurai |
| 2013 | CCS | Secure k-NN computation on encrypted cloud data without sharing key with query users. | Youwen Zhu, Rui Xu, Tsuyoshi Takagi |
| 2013 | IWSEC | Improvement of Faugre et al.'s Method to Solve ECDLP. | Yun-Ju Huang, Christophe Petit, Naoyuki Shinohara, Tsuyoshi Takagi |
| 2013 | IWSEC | Efficient Algorithm for Tate Pairing of Composite Order. | Yutaro Kiyomura, Tsuyoshi Takagi |
| 2013 | IWSEC | On Cheater Identifiable Secret Sharing Schemes Secure against Rushing Adversary. | Rui Xu, Kirill Morozov, Tsuyoshi Takagi |
| 2013 | PQCrypto | Extended Algorithm for Solving Underdefined Multivariate Quadratic Equations. | Hiroyuki Miura, Yasufumi Hashimoto, Tsuyoshi Takagi |
| 2013 | PQCrypto | Multivariate Signature Scheme Using Quadratic Forms. | Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai |
| 2012 | ACISP | Zero-Knowledge Protocols for the McEliece Encryption. | Kirill Morozov, Tsuyoshi Takagi |
| 2012 | ASIACRYPT | Breaking Pairing-Based Cryptosystems Using η T Pairing over GF(397). | Takuya Hayashi, Takeshi Shimoyama, Naoyuki Shinohara, Tsuyoshi Takagi |
| 2012 | ICISC | Batch Verification Suitable for Efficiently Verifying a Limited Number of Signatures. | Keisuke Hakuta, Yosuke Katoh, Hisayoshi Sato, Tsuyoshi Takagi |
| 2012 | ISPEC | Key Length Estimation of Pairing-Based Cryptosystems Using η T Pairing. | Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi |
| 2012 | IWSEC | Application of Scalar Multiplication of Edwards Curves to Pairing-Based Cryptography. | Takanori Yasuda, Tsuyoshi Takagi, Kouichi Sakurai |
| 2012 | IWSEC | Efficient Secure Primitive for Privacy Preserving Distributed Computations. | Youwen Zhu, Tsuyoshi Takagi, Liusheng Huang |
| 2011 | ACISP | GeoEnc: Geometric Area Based Keys and Policies in Functional Encryption Systems. | Mingwu Zhang, Tsuyoshi Takagi |
| 2011 | PQCrypto | General Fault Attacks on Multivariate Public Key Cryptosystems. | Yasufumi Hashimoto, Tsuyoshi Takagi, Kouichi Sakurai |
| 2011 | ProvSec | Efficient Identity-Based Signcryption in the Standard Model. | Fagen Li, Fahad Bin Muhaya, Mingwu Zhang, Tsuyoshi Takagi |
| 2011 | ProvSec | Anonymous Encryption with Partial-Order Subset Delegation Functionality. | Mingwu Zhang, Takashi Nishide, Bo Yang, Tsuyoshi Takagi |
| 2010 | IWSEC | Efficient Implementation of Pairing on BREW Mobile Phones. | Tadashi Iyama, Shinsaku Kiyomoto, Kazuhide Fukushima, Toshiaki Tanaka, Tsuyoshi Takagi |
| 2010 | PKC | Solving a 676-Bit Discrete Logarithm Problem in GF(3 | Takuya Hayashi, Naoyuki Shinohara, Lihua Wang, Shin'ichiro Matsuo, Masaaki Shirase, Tsuyoshi Takagi |
| 2009 | ISPEC | Certificateless Hybrid Signcryption. | Fagen Li, Masaaki Shirase, Tsuyoshi Takagi |
| 2008 | CANS | On the Security of Online/Offline Signatures and Multisignatures from ACISP'06. | Fagen Li, Masaaki Shirase, Tsuyoshi Takagi |
| 2008 | ISPEC | Efficient Arithmetic on Subfield Elliptic Curves over Small Finite Fields of Odd Characteristic. | Keisuke Hakuta, Hisayoshi Sato, Tsuyoshi Takagi |
| 2008 | ISPEC | An Efficient Countermeasure against Side Channel Attacks for Pairing Computation. | Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2008 | KES | Network Forensics on Mobile Ad-Hoc Networks. | Akira Otaka, Tsuyoshi Takagi, Osamu Takahashi |
| 2008 | NPC | Key Management Using Certificateless Public Key Cryptography in Ad Hoc Networks. | Fagen Li, Masaaki Shirase, Tsuyoshi Takagi |
| 2008 | Pairing | Faster Implementation of eta-T Pairing over GF(3 | Yuto Kawahara, Kazumaro Aoki, Tsuyoshi Takagi |
| 2008 | PQCrypto | Digital Signatures Out of Second-Preimage Resistant Hash Functions. | Erik Dahmen, Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2007 | ACNS | Compressed XTR. | Masaaki Shirase, Dong-Guk Han, Yasushi Hibino, Ho Won Kim, Tsuyoshi Takagi |
| 2007 | AINA | Efficient Conjunctive Keyword-Searchable Encryption. | Eun-Kyung Ryu, Tsuyoshi Takagi |
| 2007 | AINA | Privacy-Preserving Two-Party K-Means Clustering via Secure Approximation. | Chunhua Su, Feng Bao, Jianying Zhou, Tsuyoshi Takagi, Kouichi Sakurai |
| 2007 | ARITH | An Algorithm for the nt Pairing Calculation in Characteristic Three and its Hardware Implementation. | Jean-Luc Beuchat, Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2007 | ISPEC | Some Efficient Algorithms for the Final Exponentiation of | Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2007 | ISPEC | Two-Party Privacy-Preserving Agglomerative Document Clustering. | Chunhua Su, Jianying Zhou, Feng Bao, Tsuyoshi Takagi, Kouichi Sakurai |
| 2007 | IWSEC | Reduction Optimal Trinomials for Efficient Software Implementation of the eta | Toshiya Nakajima, Tetsuya Izu, Tsuyoshi Takagi |
| 2007 | WAIFI | A Coprocessor for the Final Exponentiation of the | Jean-Luc Beuchat, Nicolas Brisebarre, Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2007 | WISA | Universal | Masaaki Shirase, Yuto Kawahara, Tsuyoshi Takagi, Eiji Okamoto |
| 2007 | WISA | Efficient Implementation of the Pairing on Mobilephones Using BREW. | Motoi Yoshitomi, Tsuyoshi Takagi, Shinsaku Kiyomoto, Toshiaki Tanaka |
| 2006 | ASIACRYPT | New Approach for Selectively Convertible Undeniable Signature Schemes. | Kaoru Kurosawa, Tsuyoshi Takagi |
| 2006 | CANS | Side Channel Attacks and Countermeasures on Pairing Based Cryptosystems over Binary Fields. | Tae Hyun Kim, Tsuyoshi Takagi, Dong-Guk Han, Ho Won Kim, Jongin Lim |
| 2006 | CARDIS | Power Analysis to ECC Using Differential Power Between Multiplication and Squaring. | Toru Akishita, Tsuyoshi Takagi |
| 2006 | CIS | Efficient Implementation of Tate Pairing on a Mobile Phone Using Java. | Yuto Kawahara, Tsuyoshi Takagi, Eiji Okamoto |
| 2006 | CIS | An Efficient and Secure RFID Security Method with Ownership Transfer. | Kyosuke Osaka, Tsuyoshi Takagi, Kenichi Yamazaki, Osamu Takahashi |
| 2006 | ICCSA | New Security Problem in RFID Systems "Tag Killing". | Dong-Guk Han, Tsuyoshi Takagi, Howon Kim, Kyoil Chung |
| 2006 | ISPEC | Further Security Analysis of XTR. | Dong-Guk Han, Tsuyoshi Takagi, Jongin Lim |
| 2005 | ACISP | A Complete Divisor Class Halving Algorithm for Hyperelliptic Curve Cryptosystems of Genus Two. | Izuru Kitamura, Masanobu Katagi, Tsuyoshi Takagi |
| 2005 | ACISP | Efficient Representations on Koblitz Curves with Resistance to Side Channel Attacks. | Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2005 | CHES | Short Memory Scalar Multiplication on Koblitz Curves. | Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2005 | CIS | Insider Impersonation-MIM Attack to Tripartite Key Agreement Scheme and an Efficient Protocol for Multiple Keys. | Lihua Wang, Takeshi Okamoto, Tsuyoshi Takagi, Eiji Okamoto |
| 2005 | EUC | Collision Attack on XTR and a Countermeasure with a Fixed Pattern. | Dong-Guk Han, Tsuyoshi Takagi, Tae Hyun Kim, Howon Kim, Kyoil Chung |
| 2004 | ACISP | On the Exact Flexibility of the Flexible Countermeasure Against Side Channel Attacks. | Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2004 | ACNS | Security Analysis of CRT-Based Cryptosystems. | Katsuyuki Okeya, Tsuyoshi Takagi |
| 2004 | CRYPTO | Signed Binary Representations Revisited. | Katsuyuki Okeya, Katja Schmidt-Samoa, Christian Spahn, Tsuyoshi Takagi |
| 2004 | ICISC | Some Improved Algorithms for Hyperelliptic Curve Cryptosystems Using Degenerate Divisors. | Masanobu Katagi, Toru Akishita, Izuru Kitamura, Tsuyoshi Takagi |
| 2004 | ICRA | Behavior Description and Control using Behavior Module for Personal Robot. | Yukiko Hoshino, Tsuyoshi Takagi, Ugo Di Profio, Masahiro Fujita |
| 2004 | INDOCRYPT | A Provably Secure Elliptic Curve Scheme with Fast Encryption. | David Galindo, Sebasti Martn Mollev, Tsuyoshi Takagi, Jorge Luis Villar |
| 2004 | INDOCRYPT | Exact Analysis of Montgomery Multiplication. | Hisayoshi Sato, Daniel Schepers, Tsuyoshi Takagi |
| 2004 | IROS | Behavior selection and motion modulation in emotionally grounded architecture for QRIO SDR-4XII. | Tsutomu Sawada, Tsuyoshi Takagi, Masahiro Fujita |
| 2004 | PKC | On the Optimal Parameter Choice for Elliptic Curve Cryptosystems Using Isogeny. | Toru Akishita, Tsuyoshi Takagi |
| 2004 | WISA | Novel Efficient Implementations of Hyperelliptic Curve Cryptosystems Using Degenerate Divisors. | Masanobu Katagi, Izuru Kitamura, Toru Akishita, Tsuyoshi Takagi |
| 2003 | ASIACRYPT | A Complete and Explicit Security Reduction Algorithm for RSA-Based Cryptosystems. | Kaoru Kurosawa, Katja Schmidt-Samoa, Tsuyoshi Takagi |
| 2003 | ASIACRYPT | Some RSA-Based Encryption Schemes with Tight Security Reduction. | Kaoru Kurosawa, Tsuyoshi Takagi |
| 2003 | ASIACRYPT | Generalized Powering Functions and Their Application to Digital Signatures. | Hisayoshi Sato, Tsuyoshi Takagi, Satoru Tezuka, Kazuo Takaragi |
| 2003 | CHES | A More Flexible Countermeasure against Side Channel Attacks Using Window Method. | Katsuyuki Okeya, Tsuyoshi Takagi |
| 2003 | PKC | Exceptional Procedure Attack on Elliptic Curve Cryptosystems. | Tetsuya Izu, Tsuyoshi Takagi |
| 2002 | ACISP | A New Distributed Primality Test for Shared RSA Keys Using Quadratic Fields. | Ingrid Biehl, Tsuyoshi Takagi |
| 2002 | ACISP | On the Security of a Modified Paillier Public-Key Primitive. | Kouichi Sakurai, Tsuyoshi Takagi |
| 2002 | ICICS | Fast Elliptic Curve Multiplications with SIMD Operations. | Tetsuya Izu, Tsuyoshi Takagi |
| 2002 | ICISC | Efficient Computations of the Tate Pairingfor the Large MOV Degrees. | Tetsuya Izu, Tsuyoshi Takagi |
| 2002 | ICISC | A Reject Timing Attackon an IND-CCA2 Public-Key Cryptosystem. | Kouichi Sakurai, Tsuyoshi Takagi |
| 2002 | INDOCRYPT | Improved Elliptic Curve Multiplication Methods Resistant against Side Channel Attacks. | Tetsuya Izu, Bodo Mller, Tsuyoshi Takagi |
| 2002 | PKC | A Fast Parallel Elliptic Curve Multiplication Resistant against Side Channel Attacks. | Tetsuya Izu, Tsuyoshi Takagi |
| 2002 | PKC | New Semantically Secure Public-Key Cryptosystems from the RSA-Primitive. | Kouichi Sakurai, Tsuyoshi Takagi |
| 2001 | ICISC | An IND-CCA2 Public-Key Cryptosystem with Fast Decryption. | Johannes Buchmann, Kouichi Sakurai, Tsuyoshi Takagi |
| 2001 | ICRA | Ethological Modeling and Architecture for an Entertainment Robot. | Ronald C. Arkin, Masahiro Fujita, Tsuyoshi Takagi, Rika Hasegawa |
| 1999 | ASIACRYPT | Reducing Logarithms in Totally Non-maximal Imaginary Quadratic Orders to Logarithms in Finite Fields. | Detlef Hhnlein, Tsuyoshi Takagi |
| 1999 | CHES | NICE - New Ideal Coset Encryption. | Michael Hartmann, Sachar Paulus, Tsuyoshi Takagi |
| 1998 | CRYPTO | Fast RSA-Type Cryptosystem Modulo p | Tsuyoshi Takagi |
| 1998 | EuroCrypt | A Cryptosystem Based on Non-maximal Imaginary Quadratic Orders with Fast Decryption. | Detlef Hhnlein, Michael J. Jacobson Jr., Sachar Paulus, Tsuyoshi Takagi |
| 1998 | ICISC | Rabin and RSA analogues based on non-maximal imaginary quadratic orders. | Detlef Hhnlein, Andreas Meyer, Tsuyoshi Takagi |
| 1998 | ICISC | A generalization of the Diffie-Hellman problem and related cryptosystems allowing fast decryption. | Sachar Paulus, Tsuyoshi Takagi |
| 1997 | CRYPTO | Fast RSA-Type Cryptosystems Using N-Adic Expansion. | Tsuyoshi Takagi |
| 1996 | ISAAC | The Multi-variable Modular Polynomial and Its Applications to Cryptography. | Tsuyoshi Takagi, Shozo Naito |