Tsuyoshi Takagi

Masahiro Fujita, Tsuyoshi Takagi, Ronald C. Arkin, 2001, Proceedings 2001 ICRA. IEEE International Conference on Robotics and Automation (Cat. No.01CH37164).

Application of Scalar Multiplication of Edwards Curves to Pairing-Based Cryptography

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2012, IWSEC.

An IND-CCA2 Public-Key Cryptosystem with Fast Decryption

Tsuyoshi Takagi, Kouichi Sakurai, Johannes A. Buchmann, 2001, ICISC.

An Efficient Residue Group Multiplication for the etaT Pairing over F3m

Masaaki Shirase, Tsuyoshi Takagi, Yuta Sasaki, 2009, Selected Areas in Cryptography.

A reject timing attack on an IND-CCA2 public-key cryptosystem

Tsuyoshi Takagi, Kouichi Sakurai, 2003 .

A Structural Attack on Block-Anti-Circulant UOV at SAC 2019

Tsuyoshi Takagi, Hiroki Furue, Koha Kinjo, 2020, PQCrypto.

Revisiting the Efficient Key Generation of ZHFE

Tsuyoshi Takagi, Albrecht Petzoldt, Dung Hoang Duong, 2017, C2SI.

Identity-based partially blind signature in the standard model for electronic cash

Mingwu Zhang, Fagen Li, Tsuyoshi Takagi, 2013, Math. Comput. Model..

Parallel Gauss Sieve Algorithm: Solving the SVP Challenge over a 128-Dimensional Ideal Lattice

Tsuyoshi Takagi, Tsukasa Ishiguro, Shinsaku Kiyomoto, 2014, Public Key Cryptography.

Collaborative agglomerative document clustering with limited information disclosure

Chunhua Su, Tsuyoshi Takagi, Kouichi Sakurai, 2014, Secur. Commun. Networks.

An Algorithm for the ηT Pairing Calculation in Characteristic Three and its Hardware Implementation

Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto, 2006, IACR Cryptol. ePrint Arch..

Some properties of $${\tau }$$τ-adic expansions on hyperelliptic Koblitz curves

Hisayoshi Sato, Tsuyoshi Takagi, Keisuke Hakuta, 2014, ArXiv.

Tight Reductions for Diffie-Hellman Variants in the Algebraic Group Model

Tsuyoshi Takagi, Atsushi Takayasu, Taiga Mizuide, 2019, IACR Cryptol. ePrint Arch..

Secure k-NN computation on encrypted cloud data without sharing key with query users

Tsuyoshi Takagi, Rui Xu, Youwen Zhu, 2013, Cloud Computing '13.

Efficient Secure Primitive for Privacy Preserving Distributed Computations

Tsuyoshi Takagi, Liusheng Huang, Youwen Zhu, 2012, IWSEC.

On the Complexity of the LWR-Solving BKW Algorithm

Tsuyoshi Takagi, Shinsaku Kiyomoto, Kazuhide Fukushima, 2018, ICISC.

Anonymous spatial encryption under affine space delegation functionality with full security

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2014, Inf. Sci..

Distributed Noise Generation for Density Estimation Based Clustering without Trusted Third Party

Chunhua Su, Tsuyoshi Takagi, Kouichi Sakurai, 2009, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Some RSA-Based Encryption Schemes with Tight Security Reduction

Kaoru Kurosawa, Tsuyoshi Takagi, 2003, ASIACRYPT.

Revocable and strongly unforgeable identity-based signature scheme in the standard model

Tsuyoshi Takagi, Yupu Hu, Zhenhua Liu, 2016, Secur. Commun. Networks.

Fast Elliptic Curve Multiplications Resistant against Side Channel Attacks

Tsuyoshi Takagi, Tetsuya Izu, T. Izu, 2005, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Behavior selection and motion modulation in emotionally grounded architecture for QRIO SDR-4XII

Masahiro Fujita, Tsutomu Sawada, Tsuyoshi Takagi, 2004, 2004 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) (IEEE Cat. No.04CH37566).

Memory-Constrained Implementation of Lattice-based Encryption Scheme on the Standard Java Card Platform

Tsuyoshi Takagi, Shinsaku Kiyomoto, Ye Yuan, 2018, IACR Cryptol. ePrint Arch..

The Width-w NAF Method Provides Small Memory and Fast Elliptic Scalar Multiplications Secure against Side Channel Attacks

Tsuyoshi Takagi, Katsuyuki Okeya, T. Takagi, 2003, CT-RSA.

Radix-r Non-Adjacent Form

Tsuyoshi Takagi, Sung-Ming Yen, Bo-Ching Wu, 2004, ISC.

A Proposal of Reliable Transmission Records Collection Method for MANET Forensics, and its Evaluation

Tsuyoshi Takagi, Osamu Takahashi, Akira Otaka, 2008 .

Parallel implementation of public key cryptosystems using Web workers

Tsuyoshi Takagi, Tsukasa Ishiguro, Shinsaku Kiyomoto, 2014, 2014 IEEE 11th Consumer Communications and Networking Conference (CCNC).

Reduction Optimal Trinomials for Efficient Software Implementation of the etaT Pairing

Tsuyoshi Takagi, Tetsuya Izu, Toshiya Nakajima, 2008, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Key Length Estimation of Pairing-Based Cryptosystems Using η T Pairing

Tsuyoshi Takagi, Takeshi Shimoyama, Takuya Hayashi, 2012, ISPEC.

Security Analysis of Collusion-Resistant Nearest Neighbor Query Scheme on Encrypted Cloud Data

Tsuyoshi Takagi, Rong Hu, Youwen Zhu, 2014, IEICE Trans. Inf. Syst..

Efficient Undeniable Signature Schemes Based on Ideal Arithmetic in Quadratic Orders

Tsuyoshi Takagi, Sachar Paulus, Ingrid Biehl, 2004, Des. Codes Cryptogr..

Post-quantum Strongly Unforgeable Identity-Based Signature Scheme from Lattices without Random Oracles

Tsuyoshi Takagi, Zhenhua Liu, Xiangsong Zhang, 2013, 2013 5th International Conference on Intelligent Networking and Collaborative Systems.

Efficient Implementation of Pairing-Based Cryptography on a Sensor Node

Masaaki Shirase, Tsuyoshi Takagi, Dooho Choi, 2009, IEICE Trans. Inf. Syst..

Secure and controllable k-NN query over encrypted cloud data with key confidentiality

Tsuyoshi Takagi, Youwen Zhu, Zhiqiu Huang, 2016, J. Parallel Distributed Comput..

One Sample Ring-LWE with Rounding and Its Application to Key Exchange

Tsuyoshi Takagi, Jintai Ding, Xinwei Gao, 2019, ACNS.

Portable Implementation of Lattice-Based Cryptography Using JavaScript

Tsuyoshi Takagi, Chen-Mou Cheng, Shinsaku Kiyomoto, 2015, 2015 Third International Symposium on Computing and Networking (CANDAR).

SCA-Resistant and Fast Elliptic Scalar Multiplication Based on wNAF

Tsuyoshi Takagi, Katsuyuki Okeya, 2004, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Reconciling and improving of multi-receiver signcryption protocols with threshold decryption

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2012, Secur. Commun. Networks.

Efficient Algorithm for Tate Pairing of Composite Order

Tsuyoshi Takagi, Yutaro Kiyomura, 2013, IWSEC.

Recent Developments in Post-Quantum Cryptography

Tsuyoshi Takagi, T. Takagi, 2018, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Number field cryptography

Tsuyoshi Takagi, Johannes Buchmann, Ulrich Vollmer, 2003 .

An Efficient Key Generation of ZHFE Public Key Cryptosystem

Tsuyoshi Takagi, Albrecht Petzoldt, Dung Hoang Duong, 2018, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Key Length Estimation of Pairing-Based Cryptosystems Using ηT Pairing over GF(3n)

Tsuyoshi Takagi, Takeshi Shimoyama, Takuya Hayashi, 2014, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Extended Algorithm for Solving Underdefined Multivariate Quadratic Equations

Tsuyoshi Takagi, Hiroyuki Miura, Yasufumi Hashimoto, 2013, PQCrypto.

Improving the BKZ Reduction Algorithm by Quick Reordering Technique

Tsuyoshi Takagi, Yuntao Wang, T. Takagi, 2018, ACISP.

Zero-Value Register Attack on Elliptic Curve Cryptosystem

Tsuyoshi Takagi, Toru Akishita, 2005, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Efficient Implementation of the eta_T Pairing on GPU

Tsuyoshi Takagi, Chen-Mou Cheng, Yun-Ju Huang, 2011 .

On the Complexity of the LWR-Solving BKW Algorithm

Tsuyoshi Takagi, Shinsaku Kiyomoto, Kazuhide Fukushima, 2020, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

The Existence of Cycles in the Supersingular Isogeny Graphs Used in SIKE

Tsuyoshi Takagi, Hiroshi Onuki, Yusuke Aikawa, 2020, 2020 International Symposium on Information Theory and Its Applications (ISITA).

Cryptanalysis of GiophantusTM Schemes against Hybrid Attack

Tsuyoshi Takagi, Yuntao Wang, Yasuhiko Ikematsu, 2020, APKC@AsiaCCS.

Parallel Gauss Sieve Algorithm: Solving the SVP in the Ideal Lattice of 128 dimensions

Tsuyoshi Takagi, Tsukasa Ishiguro, Shinsaku Kiyomoto, 2013, IACR Cryptol. ePrint Arch..

New Semantically Secure Public-Key Cryptosystems from the RSA-Primitive

Tsuyoshi Takagi, Kouichi Sakurai, K. Sakurai, 2002, Public Key Cryptography.

An Efficient and Secure RFID Security Method with Ownership Transfer

Tsuyoshi Takagi, Kenichi Yamazaki, Osamu Takahashi, 2006, 2006 International Conference on Computational Intelligence and Security.

Zero-Knowledge Protocols for Code-Based Public-Key Encryption

Tsuyoshi Takagi, Kirill Morozov, Rong Hu, 2015, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

A New Scheme for Distributed Density Estimation based Privacy-Preserving Clustering

Chunhua Su, Tsuyoshi Takagi, Kouichi Sakurai, 2008, 2008 Third International Conference on Availability, Reliability and Security.

Reducing the Key Size of Rainbow Using Non-commutative Rings

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2012, CT-RSA.

Power Analysis to ECC Using Differential Power Between Multiplication and Squaring

Tsuyoshi Takagi, Toru Akishita, 2006, CARDIS.

A variant of rainbow with shorter secret key and faster signature generation

Tsuyoshi Takagi, Kouichi Sakurai, Jintai Ding, 2013, AsiaPKC '13.

A New Upper Bound for the Minimal Density of Joint Representations in Elliptic Curve Cryptosystems

Tsuyoshi Takagi, Erik Dahmen, Katsuyuki Okeya, 2007, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

A construction of 3-dimensional lattice sieve for number field sieve over F_{p^n}

Tsuyoshi Takagi, Kazumaro Aoki, Tetsutaro Kobayashi, 2015, IACR Cryptol. ePrint Arch..

Solving a 676-bit Discrete Logarithm Problem in GF(36n)

Masaaki Shirase, Tsuyoshi Takagi, Shin'ichiro Matsuo, 2010, IACR Cryptol. ePrint Arch..

Further Security Analysis of XTR

Tsuyoshi Takagi, Jongin Lim, Dong-Guk Han, 2006, ISPEC.

Heuristic counting of Kachisa-Schaefer-Scott curves

Tsuyoshi Takagi, Takanori Yasuda, Noriyasu Iwamoto, 2014, JSIAM Lett..

Improvement of Faugère et al.'s Method to Solve ECDLP

Tsuyoshi Takagi, Yun-Ju Huang, Christophe Petit, 2013, IWSEC.

Faster MapToPoint on Supersingular Elliptic Curves in Characteristic 3

Tsuyoshi Takagi, Yuto Kawahara, Tetsutaro Kobayashi, 2011, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Security Analysis and Improvements on Two Homomorphic Authentication Schemes for Network Coding

Tao Jiang, Tsuyoshi Takagi, Chi Cheng, 2016, IEEE Transactions on Information Forensics and Security.

Efficient Signcryption for Heterogeneous Systems

Hui Zhang, Fagen Li, Tsuyoshi Takagi, 2013, IEEE Systems Journal.

A Fast RSA-Type Public-Key Primitive Modulo pkq Using Hensel Lifting

Tsuyoshi Takagi, T. Takagi, 2004, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Security of Multivariate Signature Scheme Using Non-commutative Rings

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2014, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

A generalization of the Diffie-Hellman problem and related cryptosystems allowing fast decryption

Tsuyoshi Takagi, Sachar Paulus, 1998, ICISC.

Efficient arithmetic on subfield elliptic curves over small finite fields of odd characteristic

Hisayoshi Sato, Tsuyoshi Takagi, Keisuke Hakuta, 2008, J. Math. Cryptol..

Fuzzy Biometric Signcryption Scheme with Bilinear Pairings in the Standard Model

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2010, PAISI.

Cryptanalysis of Strong Designated Verifier Signature Scheme with Non-delegatability and Non-transferability

Mingwu Zhang, Fagen Li, Tsuyoshi Takagi, 2012, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Why 1.02? The root Hermite factor of LLL and stochastic sandpile models pdf

Tsuyoshi Takagi, Jintai Ding, Yuntao Wang, 2018, ArXiv.

A Polynomial-Time Algorithm for Solving a Class of Underdetermined Multivariate Quadratic Equations over Fields of Odd Characteristics

Tsuyoshi Takagi, Chen-Mou Cheng, Yasufumi Hashimoto, 2014, PQCrypto.

Zero-Knowledge Protocols for Code-Based Public-Key Encryption

Tsuyoshi Takagi, Kirill Morozov, Rong Hu, 2015 .

A Public-Key Encryption Scheme Based on Non-linear Indeterminate Equations

Tsuyoshi Takagi, Koji Nuida, Goichiro Hanaoka, 2017, SAC.

Revisits and Transformations Among Functional Encryption Systems

Tsuyoshi Takagi, Kirill Morozov, Mingwu Zhang, 2014 .

Compressed XTR

Masaaki Shirase, Tsuyoshi Takagi, Howon Kim, 2007, ACNS.

Attacks on Multi-Prime RSA with Small Prime Difference

Hui Zhang, Tsuyoshi Takagi, T. Takagi, 2013, ACISP.

A New Distributed Primality Test for Shared RSA Keys Using Quadratic Fields

Tsuyoshi Takagi, Ingrid Biehl, 2002, ACISP.

Security Analysis of the SPA-Resistant Fractional Width Method

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2006, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

HFERP - A New Multivariate Encryption Scheme

Tsuyoshi Takagi, Daniel Smith-Tone, Ray A. Perlner, 2018, PQCrypto.

Cryptographic Hardware and Embedded Systems – CHES 2016

Tsuyoshi Takagi, Bart Preneel, B. Preneel, 2016, Lecture Notes in Computer Science.

An Advanced Method for Joint Scalar Multiplications on Memory Constraint Devices

Tsuyoshi Takagi, Erik Dahmen, Katsuyuki Okeya, 2005, ESAS.

Lattice‐based signcryption

Fahad Bin Muhaya, Fagen Li, Tsuyoshi Takagi, 2013, Concurr. Comput. Pract. Exp..

Security analysis of CRT-based cryptosystems

Tsuyoshi Takagi, Katsuyuki Okeya, T. Takagi, 2004, International Journal of Information Security.

Batten Down the Hatches: Securing Neighborhood Area Networks of Smart Grid in the Quantum Era

Rongxing Lu, Tsuyoshi Takagi, Chi Cheng, 2019, IEEE Transactions on Smart Grid.

New Security Problem in RFID Systems "Tag Killing"

Tsuyoshi Takagi, Dong-Guk Han, Kyo Il Chung, 2006, ICCSA.

Explicit Relation between Low-Dimensional LLL-Reduced Bases and Shortest Vectors

Kotaro Matsuda, Tsuyoshi Takagi, Atsushi Takayasu, 2019, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Security analysis of cryptosystems using short generators over ideal lattices

Tsuyoshi Takagi, Masaya Yasuda, Shingo Sugiyama, 2018, IACR Cryptol. ePrint Arch..

A More Flexible Countermeasure against Side Channel Attacks Using Window Method

Tsuyoshi Takagi, Katsuyuki Okeya, T. Takagi, 2003, CHES.

Constructing an efficient hash function from $3$-isogenies

Tsuyoshi Takagi, Katsuyuki Takashima, Hikari Tachibana, 2017, JSIAM Lett..

Extended Algorithm for Solving Underdefined Multivariate Quadratic Equations

Tsuyoshi Takagi, Yasufumi Hashimoto, Hiroyuki Miura, 2013, PQCrypto.

General Fault Attacks on Multivariate Public Key Cryptosystems

Tsuyoshi Takagi, Kouichi Sakurai, Yasufumi Hashimoto, 2011, PQCrypto.

A Cryptosystem Based on Non-maximal Imaginary Quadratic Orders with Fast Decryption

Tsuyoshi Takagi, Detlef Hühnlein, Sachar Paulus, 1998, EUROCRYPT.

On the Public Key Replacement and Universal Forgery Attacks of Short Certificateless Signature

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2010, IACR Cryptol. ePrint Arch..

Multivariate Encryption Schemes Based on Polynomial Equations over Real Numbers

Tsuyoshi Takagi, Takanori Yasuda, Yacheng Wang, 2020, PQCrypto.

Securing the Internet of Things in a Quantum World

Rongxing Lu, Tsuyoshi Takagi, Chi Cheng, 2017, IEEE Communications Magazine.

A Secure RFID Protocol based on Insubvertible Encryption Using Guardian Proxy

Tsuyoshi Takagi, Kenichi Yamazaki, Osamu Takahashi, 2008, 2008 Third International Conference on Availability, Reliability and Security.

How to Choose Secret Parameters for RSA-Type Cryptosystems over Elliptic Curves

Marc Joye, Tsuyoshi Takagi, Jean-Jacques Quisquater, 2001, Des. Codes Cryptogr..

Fast RSA-Type Cryptosystems Using N-Adic Expansion

Tsuyoshi Takagi, T. Takagi, 1997, CRYPTO.

Exact Analysis of Montgomery Multiplication

Hisayoshi Sato, Tsuyoshi Takagi, Daniel Schepers, 2004, INDOCRYPT.

Algorithms and Arithmetic Operators for Computing the ηT Pairing in Characteristic Three

Nicolas Brisebarre, Masaaki Shirase, Tsuyoshi Takagi, 2008, IEEE Transactions on Computers.

Security and Correctness Analysis on Privacy-Preserving k-Means Clustering Schemes

Chunhua Su, Tsuyoshi Takagi, Kouichi Sakurai, 2009, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

A Reject Timing Attackon an IND-CCA2 Public-Key Cryptosystem

Tsuyoshi Takagi, Kouichi Sakurai, K. Sakurai, 2002, ICISC.

Privacy-Preserving OLAP for Accurate Answer

Mingwu Zhang, Tsuyoshi Takagi, Liusheng Huang, 2012, J. Circuits Syst. Comput..

Cryptographic Hardware and Embedded Systems - CHES 2011 - 13th International Workshop, Nara, Japan, September 28 - October 1, 2011. Proceedings

Tsuyoshi Takagi, Bart Preneel, B. Preneel, 2011, CHES.

Efficient Implementation of the Pairing on Mobilephones Using BREW

Tsuyoshi Takagi, Toshiaki Tanaka, Shinsaku Kiyomoto, 2008, IEICE Trans. Inf. Syst..

Dual-Verifiers DVS with Message Recovery for Tolerant Routing in Wireless Sensor Networks

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2011, PAISI.

Improved Attacks on Multi-Prime RSA with Small Prime Difference

Hui Zhang, Tsuyoshi Takagi, T. Takagi, 2014, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

(Short Paper) A Faster Constant-Time Algorithm of CSIDH Keeping Two Points

Tsuyoshi Takagi, Hiroshi Onuki, Yusuke Aikawa, 2019, IWSEC.

L1-Norm Ball for CSIDH: Optimal Strategy for Choosing the Secret Key Space

Tsuyoshi Takagi, Atsushi Takayasu, Hiroshi Onuki, 2020, IACR Cryptol. ePrint Arch..

A Compact Digital Signature Scheme Based on the Module-LWR Problem

Tsuyoshi Takagi, Shinsaku Kiyomoto, Kazuhide Fukushima, 2020, ICICS.

Towards Confidentiality of ID-Based Signcryption Schemes under without Random Oracle Model

Hao Wang, Mingwu Zhang, Tsuyoshi Takagi, 2010, PAISI.

A Complete and Explicit Security Reduction Algorithm for RSA-Based Cryptosystems

Kaoru Kurosawa, Tsuyoshi Takagi, Katja Schmidt-Samoa, 2003, ASIACRYPT.

On Cheater Identifiable Secret Sharing Schemes Secure against Rushing Adversary

Tsuyoshi Takagi, Rui Xu, Kirill Morozov, 2013, IWSEC.

Architecture and preliminary experimental results for emotionally grounded symbol acquisition

Masahiro Fujita, Tsuyoshi Takagi, Rika Hasegawa, 2001, AGENTS '01.

The Secure Parameters and Efficient Decryption Algorithm for Multivariate Public Key Cryptosystem EFC

Tsuyoshi Takagi, Dung Hoang Duong, Yasuhiko Ikematsu, 2019, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Batch Verification Suitable for Efficiently Verifying a Limited Number of Signatures

Hisayoshi Sato, Tsuyoshi Takagi, Keisuke Hakuta, 2012, ICISC.

Advances in Information and Computer Security, 4th International Workshop on Security, IWSEC 2009, Toyama, Japan, October 28-30, 2009, Proceedings

Tsuyoshi Takagi, Mambo. Masahiro, 2009, IWSEC.

Efficient Implementation of the etaT Pairing on GPU

Tsuyoshi Takagi, Chen-Mou Cheng, Yun-Ju Huang, 2011, IACR Cryptol. ePrint Arch..

Certificateless hybrid signcryption

Fagen Li, Masaaki Shirase, Tsuyoshi Takagi, 2013, Math. Comput. Model..

An experiment of number field sieve for discrete logarithm problem over $\text{GF}(p^n)$

Tsuyoshi Takagi, Kazumaro Aoki, Tetsutaro Kobayashi, 2014, JSIAM Lett..

An Efficient MQ-Based Signature in the QROM

Tsuyoshi Takagi, Dung Hoang Duong, Hiroki Furue, 2019, 2019 Seventh International Symposium on Computing and Networking (CANDAR).

Device, method and computer program for cryptographic processing

Tsuyoshi Takagi, Masanobu Katagi, Toru Akishita, 2005 .

Digital Signatures Out of Second-Preimage Resistant Hash Functions

Tsuyoshi Takagi, Erik Dahmen, Katsuyuki Okeya, 2008, PQCrypto.

Improved Progressive BKZ Algorithms and Their Precise Cost Estimation by Sharp Simulator

Tsuyoshi Takagi, Yoshinori Aono, Yuntao Wang, 2016, EUROCRYPT.

Mathematical Modelling for Next-Generation Cryptography: CREST Crypto-Math Project

Tsuyoshi Takagi, Keisuke Tanaka, Noboru Kunihiro, 2017, CREST Crypto-Math Project.

An Electronic Scheme for the Farnel Paper-Based Voting Protocol

Tsuyoshi Takagi, Alexander Wiesmaier, Ricardo Felipe Custódio, 2006 .

On collisions related to an ideal class of order 3 in CSIDH

Tsuyoshi Takagi, Hiroshi Onuki, T. Takagi, 2020, IACR Cryptol. ePrint Arch..

Efficient Privacy-Preserving Reputation Evaluation in Decentralized Environments

Tsuyoshi Takagi, Youwen Zhu, 2014, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Identity-based online/offline signcryption for low power devices

Fagen Li, Tsuyoshi Takagi, Muhammad Khurram Khan, 2012, J. Netw. Comput. Appl..

Universal etaT Pairing Algorithm over Arbitrary Extension Degree

Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto, 2007, WISA.

CyclicSRP - A Multivariate Encryption Scheme with a Partially Cyclic Public Key

Tsuyoshi Takagi, Albrecht Petzoldt, Dung Hoang Duong, 2017, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Cryptanalysis of efficient proxy signature schemes for mobile communication

Fagen Li, Masaaki Shirase, Tsuyoshi Takagi, 2010, Science China Information Sciences.

Novel Efficient Implementations of Hyperelliptic Curve Cryptosystems Using Degenerate Divisors

Tsuyoshi Takagi, Masanobu Katagi, Toru Akishita, 2004, WISA.

Rabin and RSA analogues based on non-maximal imaginary quadratic orders

Tsuyoshi Takagi, Detlef Hühnlein, Andreas Meyer, 1998, ICISC.

An Experimental Study of the BDD Approach for the Search LWE Problem

Matt Henricksen, Tsuyoshi Takagi, Rui Xu, 2017, ACNS.

Key Management Using Certificateless Public Key Cryptography in Ad Hoc Networks

Fagen Li, Masaaki Shirase, Tsuyoshi Takagi, 2008, NPC.

The Beauty and the Beasts - The Hard Cases in LLL Reduction

Tsuyoshi Takagi, Jintai Ding, Yuntao Wang, 2017, IWSEC.

A Provably Secure Elliptic Curve Scheme with Fast Encryption

Jorge Luis Villar, Tsuyoshi Takagi, Sebastià Martín Molleví, 2004, INDOCRYPT.

How to Construct CSIDH on Edwards Curves

Tsuyoshi Takagi, Hiroshi Onuki, Tomoki Moriya, 2020, IACR Cryptol. ePrint Arch..

An Estimate of the Complexity of the Section Finding Problem on Algebraic Surfaces

Tsuyoshi Takagi, Shinya Okumura, Koichiro Akiyama, 2016, 2016 Fourth International Symposium on Computing and Networking (CANDAR).

LLL and stochastic sandpile models

Tsuyoshi Takagi, Jintai Ding, Yuntao Wang, 2018, IACR Cryptol. ePrint Arch..

On the Security of Online/Offline Signatures and Multisignatures from ACISP'06

Fagen Li, Masaaki Shirase, Tsuyoshi Takagi, 2008, CANS.

A process for the modular exponentiation for decryption and for generating digital signatures

Tsuyoshi Takagi, Katsuyuki Okeya, 2004 .

Analysis of fractional window recoding methods and their application to elliptic curve cryptosystems

Tsuyoshi Takagi, Katja Schmidt-Samoa, Olivier Semay, 2006, IEEE Transactions on Computers.

Efficient Decryption Algorithms for Extension Field Cancellation Type Encryption Schemes

Tsuyoshi Takagi, Dung Hoang Duong, Yasuhiko Ikematsu, 2018, ACISP.

Exceptional Procedure Attack on Elliptic Curve Cryptosystems

Tsuyoshi Takagi, Tetsuya Izu, T. Takagi, 2003, Public Key Cryptography.

Secure and Efficient Pairing at 256-Bit Security Level

Tsuyoshi Takagi, Masaya Yasuda, Yuto Kawahara, 2017, ACNS.

On the importance of protecting /spl Delta/ in SFLASH against side channel attacks

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2004, International Conference on Information Technology: Coding and Computing, 2004. Proceedings. ITCC 2004..

Anonymous encryption with partial-order subset delegation and its application in privacy email systems

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2014, IET Inf. Secur..

Secure k-NN query on encrypted cloud database without key-sharing

Tsuyoshi Takagi, Rui Xu, Youwen Zhu, 2013, Int. J. Electron. Secur. Digit. Forensics.

Efficient Implementation of Pairing Computation on Mobile Phones using BREW

Tsuyoshi Takagi, Toshiaki Tanaka, Shinsaku Kiyomoto, 2006 .

Efficient Multi-PKG ID-Based Signcryption for Ad Hoc Networks

Fagen Li, Masaaki Shirase, Tsuyoshi Takagi, 2008, Inscrypt.

Cryptanalysis of a public key cryptosystem based on Diophantine equations via weighted LLL reduction

Tsuyoshi Takagi, Jintai Ding, Chengdong Tao, 2018 .

Cryptanalysis of a public key cryptosystem based on Diophantine equations via weighted LLL reduction

Tsuyoshi Takagi, Jintai Ding, Chengdong Tao, 2018, Japan Journal of Industrial and Applied Mathematics.

New Complexity Estimation on the Rainbow-Band-Separation Attack

Tsuyoshi Takagi, Jintai Ding, Yasuhiko Ikematsu, 2021, IACR Cryptol. ePrint Arch..

An Efficient MQ-based Signature with Tight Security Proof

Tsuyoshi Takagi, Dung Hoang Duong, Hiroki Furue, 2020, Int. J. Netw. Comput..

Zero-Value Point Attacks on Elliptic Curve Cryptosystem

Tsuyoshi Takagi, Toru Akishita, T. Akishita, 2003, ISC.

Efficient Implementation of the Pairing on Mobilephones Using BREW

Tsuyoshi Takagi, Toshiaki Tanaka, Shinsaku Kiyomoto, 2007, WISA.

Efficient Variant of Rainbow without Triangular Matrix Representation

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2014, International Conference on Information and Communicatiaon Technology.

Bounded Leakage-Resilient Functional Encryption with Hidden Vector Predicate

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2013, Comput. J..

Efficient Hyperelliptic Curve Cryptosystems Using Theta Divisors

Tsuyoshi Takagi, Masanobu Katagi, Toru Akishita, 2006, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Fully secure constructions of spatial encryption with vector privacy

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2014, Int. J. Commun. Syst..

Secure identity-based signcryption in the standard model

Fagen Li, Tsuyoshi Takagi, T. Takagi, 2013, Math. Comput. Model..

Proof of plaintext knowledge for code-based public-key encryption revisited

Tsuyoshi Takagi, Kirill Morozov, Rong Hu, 2013, ASIA CCS '13.

Efficient Implementation of Pairing on BREW Mobile Phones

Tsuyoshi Takagi, Toshiaki Tanaka, Shinsaku Kiyomoto, 2010, IWSEC.

A New Variant of Unbalanced Oil and Vinegar Using Quotient Ring: QR-UOV

Tsuyoshi Takagi, Hiroki Furue, Yasuhiko Ikematsu, 2020, IACR Cryptol. ePrint Arch..

Breaking Pairing-Based Cryptosystems Using η T Pairing over GF(397)

Tsuyoshi Takagi, Takeshi Shimoyama, Takuya Hayashi, 2012, ASIACRYPT.

Cryptanalysis and Improvement of Robust Deniable Authentication Protocol

Fagen Li, Tsuyoshi Takagi, T. Takagi, 2012, Wireless Personal Communications.

Security Analysis and Efficient Implementation of Code-based Signature Schemes

Tsuyoshi Takagi, Kirill Morozov, Shinsaku Kiyomoto, 2019, ICISSP.

Group-oriented setting's multisigncryption scheme with threshold designcryption

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2011, Inf. Sci..

An Efficient Countermeasure against Side Channel Attacks for Pairing Computation

Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto, 2008, ISPEC.

On tameness of Matsumoto-Imai central maps in three variables over the finite field 픽2

Hisayoshi Sato, Tsuyoshi Takagi, Keisuke Hakuta, 2016, Adv. Math. Commun..

Behavior description and control using behavior module for personal robot

Masahiro Fujita, Tsuyoshi Takagi, Yukiko Hoshino, 2004, IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA '04. 2004.

Collision Attack on XTR and a Countermeasure with a Fixed Pattern

Tsuyoshi Takagi, Howon Kim, Dong-Guk Han, 2005, EUC Workshops.

An ethological and emotional basis for human-robot interaction

Masahiro Fujita, Tsuyoshi Takagi, Ronald C. Arkin, 2003, Robotics Auton. Syst..

Insider Impersonation-MIM Attack to Tripartite Key Agreement Scheme and an Efficient Protocol for Multiple Keys

Tsuyoshi Takagi, Takeshi Okamoto, Eiji Okamoto, 2005, CIS.

Further improvement of an identity-based signcryption scheme in the standard model

Fagen Li, Tsuyoshi Takagi, Zhiguang Qin, 2012, Comput. Electr. Eng..

One-Wayness Equivalent to General Factoring

Kaoru Kurosawa, Tsuyoshi Takagi, K. Kurosawa, 2009, IEEE Transactions on Information Theory.

Fast RSA-Type Cryptosystem Modulo pkq

Tsuyoshi Takagi, T. Takagi, 1998, CRYPTO.

Privacy-preserving and adaptively-secure encryptions with Deterministic Finite Automata policy and their applications

Bo Yang, Tsuyoshi Takagi, Chun Zhi Wang, 2015 .

Choosing Parameters for the Subfield Lattice Attack Against Overstretched NTRU

Tsuyoshi Takagi, Masaya Yasuda, Dung Hoang Duong, 2017, ISC.

Analysis and improvement of authenticatable ring signcryption scheme

Fagen Li, Masaaki Shirase, Tsuyoshi Takagi, 2008, IACR Cryptol. ePrint Arch..

Reduction Optimal Trinomials for Efficient Software Implementation of the etaT Pairing

Tsuyoshi Takagi, Tetsuya Izu, Toshiya Nakajima, 2007, IWSEC.

Side Channel Attacks and Countermeasures on Pairing Based Cryptosystems over Binary Fields

Tsuyoshi Takagi, Howon Kim, Jongin Lim, 2006, CANS.

Short-Memory Scalar Multiplication for Koblitz Curves

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2008, IEEE Transactions on Computers.

A hybrid approach for privacy-preserving RFID tags

Tsuyoshi Takagi, Eun-Kyung Ryu, 2009, Comput. Stand. Interfaces.

Generalized Powering Functions and Their Application to Digital Signatures

Hisayoshi Sato, Tsuyoshi Takagi, Satoru Tezuka, 2006, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

FPGA and ASIC implementations of the etaT pairing in characteristic three

Masaaki Shirase, Tsuyoshi Takagi, Takeshi Okamoto, 2010, Comput. Electr. Eng..

Privacy-Preserving Two-Party K-Means Clustering via Secure Approximation

Chunhua Su, Tsuyoshi Takagi, Kouichi Sakurai, 2007, 21st International Conference on Advanced Information Networking and Applications Workshops (AINAW'07).

Efficient Conjunctive Keyword-Searchable Encryption SSNDS-07

Tsuyoshi Takagi, Eun-Kyung Ryu, 2007 .

An id-based non-interactive tripartite key agreement protocol with K-resilience

Tsuyoshi Takagi, Raylin Tso, Takeshi Okamoto, 2005, Communications and Computer Networks.

On the Importance of Protecting ∆ in SFLASH against Side Channel Attacks

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2001 .

Some Improved Algorithms for Hyperelliptic Curve Cryptosystems Using Degenerate Divisors

Tsuyoshi Takagi, Masanobu Katagi, Toru Akishita, 2004, ICISC.

A Complete Divisor Class Halving Algorithm for Hyperelliptic Curve Cryptosystems of Genus Two

Tsuyoshi Takagi, Masanobu Katagi, Izuru Kitamura, 2005, ACISP.

Portable Implementation of Postquantum Encryption Schemes and Key Exchange Protocols on JavaScript-Enabled Platforms

Tsuyoshi Takagi, Shinsaku Kiyomoto, Ye Yuan, 2018, Secur. Commun. Networks.

A Refined Algorithm for the etaT Pairing Calculation in Characteristic Three

Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto, 2007, IACR Cryptol. ePrint Arch..

A Coprocessor for the Final Exponentiation of the eta T Pairing in Characteristic Three

Nicolas Brisebarre, Masaaki Shirase, Tsuyoshi Takagi, 2007, WAIFI.

Some Analysis of Radix-r Representations

Tsuyoshi Takagi, Dong-Guk Han, T. Takagi, 2005, IACR Cryptol. ePrint Arch..

An Improved Authenticated Encryption Scheme

Fagen Li, Tsuyoshi Takagi, Jiang Deng, 2011, IEICE Trans. Inf. Syst..

Efficient Conjunctive Keyword-Searchable Encryption

Tsuyoshi Takagi, Eun-Kyung Ryu, T. Takagi, 2007, 21st International Conference on Advanced Information Networking and Applications Workshops (AINAW'07).

An Experiment of Number Field Sieve for Discrete Logarithm Problem over GF(p 12)

Tsuyoshi Takagi, Kazumaro Aoki, Tetsutaro Kobayashi, 2013, Number Theory and Cryptography.

Efficient Representations on Koblitz Curves with Resistance to Side Channel Attacks

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2005, ACISP.

An Experiment of Number Field Sieve over GF(p) of Low Hamming Weight Characteristic

Tsuyoshi Takagi, Kenichiro Hayasaka, T. Takagi, 2011, IWCC.

Privacy-Preserving k-Nearest Neighbour Query on Outsourced Database

Tsuyoshi Takagi, Yanjiang Yang, Jianying Zhou, 2016, ACISP.

Two-Party Privacy-Preserving Agglomerative Document Clustering

Chunhua Su, Tsuyoshi Takagi, Kouichi Sakurai, 2007, ISPEC.

A multivariate quadratic challenge toward post-quantum generation cryptography

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2015, ACCA.

Special issue on provable security

Tsuyoshi Takagi, Shaoquan Jiang, Guilin Wang, 2016, Secur. Commun. Networks.

Efficient Variant of Rainbow without Triangular Matrix Representation

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2014, ICT-EurAsia.

New public-key cryptosystems with fast decryption

Tsuyoshi Takagi, T. Takagi, 2001 .

Efficient variant of Rainbow using sparse secret keys

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2014, J. Wirel. Mob. Networks Ubiquitous Comput. Dependable Appl..

On the Exact Flexibility of the Flexible Countermeasure Against Side Channel Attacks

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2004, ACISP.

Paper Special Section on Cryptography and Information Security Radix-r Non-adjacent Form and Its Application to Pairing-based Cryptosystem *

Tsuyoshi Takagi, Sung-Ming Yen, Bo-Ching Wu, 2006 .

Introduction to Public-Key Cryptography

Tsuyoshi Takagi, 2014 .

Some Explicit Formulae of NAF and its Left-to-Right Analogue

Tsuyoshi Takagi, Dong-Guk Han, Tetsuya Izu, 2005, IACR Cryptol. ePrint Arch..

Proposal of Defense Method, its implementation and Evaluation against Black hole Attack in AODV-based Mobile Ad Hoc Network

Shin Yokoyama, Tsuyoshi Takagi, Kenichi Yamazaki, 2006 .

Group Key Exchange from CSIDH and Its Application to Trusted Setup in Supersingular Isogeny Cryptosystems

Tsuyoshi Takagi, Katsuyuki Takashima, Tomoki Moriya, 2019, Inscrypt.

Provable Security against Side Channel Attacks

Takeshi Koshiba, Tsuyoshi Takagi, Tetsuya Izu, 2003 .

Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 2017

Tsuyoshi Takagi, Yasufumi Hashimoto, Yasuhiko Ikematsu, 2019, J. Inf. Process..

Security Analysis of CRT-Based Cryptosystems

Tsuyoshi Takagi, Katsuyuki Okeya, 2004, ACNS.

Fast Elliptic Curve Multiplications with SIMD Operations

Tsuyoshi Takagi, Tetsuya Izu, 2004, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Recent Developments in Post-Quantum Cryptography

Tsuyoshi Takagi, 2018, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Efficient secure primitive for privacy preserving distributed computations

Tsuyoshi Takagi, Liusheng Huang, Youwen Zhu, 2012 .

On Zero-Knowledge Identification Based on Q-ary Syndrome Decoding

Tsuyoshi Takagi, Kirill Morozov, Rong Hu, 2013, 2013 Eighth Asia Joint Conference on Information Security.

Hardness Evaluation for Search LWE Problem Using Progressive BKZ Simulator

Tsuyoshi Takagi, Yoshinori Aono, Yuntao Wang, 2018, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

A More Compact Representation of XTR Cryptosystem

Masaaki Shirase, Tsuyoshi Takagi, Howon Kim, 2008, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Short Lattice Signatures in the Standard Model with Efficient Tag Generation

Tsuyoshi Takagi, Koji Nuida, Kazuto Ogawa, 2020, ProvSec.

An Experimental Study of Kannan's Embedding Technique for the Search LWE Problem

Tsuyoshi Takagi, Yoshinori Aono, Yuntao Wang, 2017, ICICS.

Some Efficient Algorithms for the Final Exponentiation of eta T Pairing

Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto, 2007, ISPEC.

Master-key leakage-resilient and continue leakage-resilient functional encryption in dual affine spaces

Tsuyoshi Takagi, Ming Wu Zhang, Bo Yang, 2012 .

A Public-key Encryption Scheme Based on Non-linear Indeterminate Equations (Giophantus)

Tsuyoshi Takagi, Koji Nuida, Goichiro Hanaoka, 2017, IACR Cryptol. ePrint Arch..

A Fast Parallel Elliptic Curve Multiplication Resistant against Side Channel Attacks

Tsuyoshi Takagi, Tetsuya Izu, T. Takagi, 2002, Public Key Cryptography.

Efficient Constructions of Anonymous Multireceiver Encryption Protocol and Their Deployment in Group E-mail Systems With Privacy Preservation

Mingwu Zhang, Tsuyoshi Takagi, T. Takagi, 2013, IEEE Systems Journal.

An Improvement on the Linear Algebraic Attack for the Indeterminate Equation Encryption Scheme

Tsuyoshi Takagi, Yasuhiko Ikematsu, Koichiro Akiyama, 2018, 2018 International Symposium on Information Theory and Its Applications (ISITA).

Pairing-Based Cryptography - Pairing 2007, First International Conference, Tokyo, Japan, July 2-4, 2007, Proceedings

Tsuyoshi Takagi, Takeshi Okamoto, Eiji Okamoto, 2007, Pairing.

Network Forensics on Mobile Ad-Hoc Networks

Tsuyoshi Takagi, Osamu Takahashi, Akira Otaka, 2008, KES.

An exhaustive search method to find all small solutions of a multivariate modular linear equation

Tsuyoshi Takagi, Hui Zhang, T. Takagi, 2012, JSIAM Lett..

A New Public-Key Cryptosystem over a Quadratic Order with Quadratic Decryption Time

Tsuyoshi Takagi, Sachar Paulus, 2000, Journal of Cryptology.

Efficient system parameters for Identity-Based Encryption using supersingular elliptic curves

Tsuyoshi Takagi, Takumi Tomita, 2014, JSIAM Lett..

Improving Key Mismatch Attack on NewHope with Fewer Queries

Tsuyoshi Takagi, Yuntao Wang, Satoshi Okada, 2020, IACR Cryptol. ePrint Arch..

New Approach for Selectively Convertible Undeniable Signature Schemes

Kaoru Kurosawa, Tsuyoshi Takagi, 2006, ASIACRYPT.

Efficient Computations of the Tate Pairingfor the Large MOV Degrees

Tsuyoshi Takagi, Tetsuya Izu, 2002, ICISC.

GeoEnc: Geometric Area Based Keys and Policies in Functional Encryption Systems

Mingwu Zhang, Tsuyoshi Takagi, T. Takagi, 2011, ACISP.

Efficient Arithmetic on Subfield Elliptic Curves over Small Finite Fields of Odd Characteristic

Hisayoshi Sato, Tsuyoshi Takagi, Keisuke Hakuta, 2008, ISPEC.

Learning behavior selection through interaction based on emotionally grounded symbol concept

Masahiro Fujita, Tsutomu Sawada, Tsuyoshi Takagi, 2004, 4th IEEE/RAS International Conference on Humanoid Robots, 2004..

Generalized Powering Functions and Their Application to Digital Signatures

Hisayoshi Sato, Tsuyoshi Takagi, Satoru Tezuka, 2003, ASIACRYPT.

Note on Some Recent Cheater Identifiable Secret Sharing Schemes

Tsuyoshi Takagi, Rui Xu, Kirill Morozov, 2015, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Efficient Arithmetic on Subfield Elliptic Curves over Small Odd Characteristics

Hisayoshi Sato, Tsuyoshi Takagi, Keisuke Hakuta, 2005, IACR Cryptol. ePrint Arch..

Multibiometric Based Secure Encryption, Authentication Scheme with Fuzzy Extractor

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2011, Int. J. Netw. Secur..

Secret Sharing with Cheaters Using Multi-Receiver Authentication

Tsuyoshi Takagi, Rui Xu, Kirill Morozov, 2017, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

On Generalized First Fall Degree Assumptions

Tsuyoshi Takagi, Yun-Ju Huang, Christophe Petit, 2015, IACR Cryptol. ePrint Arch..

Efficient Left-to-Right Multi-Exponentiations

Tsuyoshi Takagi, Erik Dahmen, Katsuyuki Okeya, 2005 .

Unbounded anonymous hierarchical IBE with continual-key-leakage tolerance

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2014, Secur. Commun. Networks.

A Faster Constant-time Algorithm of CSIDH keeping Two Torsion Points

Tsuyoshi Takagi, Hiroshi Onuki, Yusuke Aikawa, 2019, IACR Cryptol. ePrint Arch..

An Efficient Authenticated Key Exchange from Random Self-Reducibility on CSIDH

Tsuyoshi Takagi, Katsuyuki Takashima, Yusuke Aikawa, 2020, IACR Cryptol. ePrint Arch..

Product Calculation Scheme

Tsuyoshi Takagi, Liusheng Huang, Youwen Zhu, 2015 .

Public Key Replacement and Universal Forgery of a SCLS Scheme

Mingwu Zhang, Tsuyoshi Takagi, Jintao Yao, 2013, Int. J. Netw. Secur..

Efficient and adaptively secure broadcast encryption systems

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2013, Secur. Commun. Networks.

Efficient Implementation of Tate Pairing on a Mobile Phone using Java

Tsuyoshi Takagi, Eiji Okamoto, Yuto Kawahara, 2006, 2006 International Conference on Computational Intelligence and Security.

Reducing the Key Size of the SRP Encryption Scheme

Tsuyoshi Takagi, Albrecht Petzoldt, Dung Hoang Duong, 2016, ACISP.

An Algorithm for the nt Pairing Calculation in Characteristic Three and its Hardware Implementation

Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto, 2007, 18th IEEE Symposium on Computer Arithmetic (ARITH '07).

Anonymous Encryption with Partial-Order Subset Delegation Functionality

Mingwu Zhang, Tsuyoshi Takagi, Bo Yang, 2011, ProvSec.

Revisiting the Minrank Problem on Multivariate Cryptography

Tsuyoshi Takagi, Yasuhiko Ikematsu, Yacheng Wang, 2020, WISA.

Efficient Identity-Based Signcryption in the Standard Model

Fahad Bin Muhaya, Mingwu Zhang, Fagen Li, 2011, ProvSec.

Revocable Identity-based Signcryption Scheme Without Random Oracles

Tsuyoshi Takagi, Yupu Hu, Zhenhua Liu, 2015, Int. J. Netw. Secur..

Some Efficient Algorithms for the Final Exponentiation of etaT Pairing

Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto, 2006, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Functional Encryption Resilient to Hard-to-Invert Leakage

Yi Mu, Mingwu Zhang, Tsuyoshi Takagi, 2015, Comput. J..

Paillier's Cryptosystem Modulo p2q and Its Applications to Trapdoor Commitment Schemes

Tsuyoshi Takagi, Katja Schmidt-Samoa, T. Takagi, 2005, Mycrypt.

Defeating Simple Power Analysis on Koblitz Curves

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2006, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Efficient and Secure Public-Key Cryptosystems

Tsuyoshi Takagi, T. Takagi, 2005 .

A-7-24 Privacy-Preserving Density Estimation-based Clustering via Random Data Perturbation

Chunhua Su, Tsuyoshi Takagi, Feng Bao, 2007 .

Efficient signcryption in the standard model

Mingwu Zhang, Fagen Li, Tsuyoshi Takagi, 2012, Concurr. Comput. Pract. Exp..

On the Security of A Privacy-Preserving Product Calculation Scheme

Tsuyoshi Takagi, Liusheng Huang, Youwen Zhu, 2015, IEEE Transactions on Dependable and Secure Computing.

Memory-constrained implementation of lattice-based encryption scheme on standard Java Card

Tsuyoshi Takagi, Shinsaku Kiyomoto, Ye Yuan, 2017, 2017 IEEE International Symposium on Hardware Oriented Security and Trust (HOST).

On the Optimal Parameter Choice for Elliptic Curve Cryptosystems Using Isogeny

Tsuyoshi Takagi, Toru Akishita, T. Akishita, 2004, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

NICE - New Ideal Coset Encryption

Tsuyoshi Takagi, Sachar Paulus, Michael Hartmann, 1999, CHES.

Zero-Knowledge Protocols for the McEliece Encryption

Tsuyoshi Takagi, Kirill Morozov, T. Takagi, 2012, ACISP.

SiGamal: A supersingular isogeny-based PKE and its application to a PRF

Tsuyoshi Takagi, Hiroshi Onuki, Tomoki Moriya, 2020, IACR Cryptol. ePrint Arch..

Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 2017

Tsuyoshi Takagi, Yasufumi Hashimoto, Yasuhiko Ikematsu, 2018, IACR Cryptol. ePrint Arch..

Multivariate Signature Scheme Using Quadratic Forms

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2013, PQCrypto.

General Fault Attacks on Multivariate Public Key Cryptosystems

Tsuyoshi Takagi, Kouichi Sakurai, Yasufumi Hashimoto, 2011, Post-Quantum Cryptography.

Practical Identity-Based Signature for Wireless Sensor Networks

Fagen Li, Tsuyoshi Takagi, Di Zhong, 2012, IEEE Wireless Communications Letters.

The Multi-variable Modular Polynomial and Its Applications to Cryptography

Shozo Naito, Tsuyoshi Takagi, 1996, ISAAC.

Constructing Pairing-Friendly Elliptic Curves Using Global Number Fields

Tsuyoshi Takagi, Kouichi Sakurai, Takanori Yasuda, 2015, 2015 Third International Symposium on Computing and Networking (CANDAR).

Certificateless hybrid signcryption

Fagen Li, Masaaki Shirase, Tsuyoshi Takagi, 2009, Math. Comput. Model..

Short Memory Scalar Multiplication on Koblitz Curves

Tsuyoshi Takagi, Katsuyuki Okeya, Camille Vuillaume, 2005, CHES.

Efficient Deniably Authenticated Encryption and Its Application to E-Mail

Fagen Li, Tsuyoshi Takagi, Di Zhong, 2016, IEEE Transactions on Information Forensics and Security.

Revisiting the Cubic UOV Signature Scheme

Tsuyoshi Takagi, Albrecht Petzoldt, Dung Hoang Duong, 2016, ICISC.

Signed Binary Representations Revisited

Tsuyoshi Takagi, Katsuyuki Okeya, Katja Schmidt-Samoa, 2004, CRYPTO.

Full Cryptanalysis of Hash Functions Based on Cubic Ramanujan Graphs

Tsuyoshi Takagi, Christophe Petit, Hyungrok Jo, 2017, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

Reducing Logarithms in Totally Non-maximal Imaginary Quadratic Orders to Logarithms in Finite Fields

Tsuyoshi Takagi, Detlef Hühnlein, 1999, ASIACRYPT.

Efficient outsourcing of secure k-nearest neighbour query over encrypted database

Tsuyoshi Takagi, Yanjiang Yang, Jianying Zhou, 2017, Comput. Secur..

Improving Thomae-Wolf Algorithm for Solving Underdetermined Multivariate Quadratic Polynomial Problem

Tsuyoshi Takagi, Hiroki Furue, Shuhei Nakamura, 2021, PQCrypto.

International Symposium on Mathematics, Quantum Theory, and Cryptography

Tsuyoshi Takagi, Noboru Kunihiro, Yasuhiko Ikematsu, 2021 .

Shortest Vectors in Lattices of Bai-Galbraith's Embedding Attack on the LWR Problem

Tsuyoshi Takagi, Shinsaku Kiyomoto, Kazuhide Fukushima, 2021, IWSEC.

(Short Paper) Simple Matrix Signature Scheme

Tsuyoshi Takagi, Yacheng Wang, Changze Yin, 2021, IWSEC.

A Compact Digital Signature Scheme Based on the Module-LWR problem

Tsuyoshi Takagi, Shinsaku Kiyomoto, Kazuhide Fukushima, 2021 .

A physical study of the LLL algorithm

Tsuyoshi Takagi, Bo-Yin Yang, Jintai Ding, 2021 .

How to Choose Secret Parameters for RSA and its Extensions to Elliptic Curves

Marc Joye, Tsuyoshi Takagi, Jean-Jacques Quisquater, 2001 .

Construction of RSA cryptosystem over the algebraic field using ideal theory and investigation of its security

Shozo Naito, Tsuyoshi Takagi, 2000 .

Power Analysis Attacks and Countermeasures on ηT Pairing over Binary Fields

Tsuyoshi Takagi, Jongin Lim, Howon Kim, 2008 .

Extension of Rabin Cryptosystem to Eisenstein and Gauss Fields

Shozo Naito, Tsuyoshi Takagi, 1997 .

Efficient Computation of Eta Pairing over Binary Field with Vandermonde Matrix

Masaaki Shirase, Tsuyoshi Takagi, Dooho Choi, 2009 .

A Parallelized Elliptic Curve Multiplication and its Resistance against Side-Channel Attacks (Algorithms in Algebraic Systems and Computation Theory)

Tsuyoshi Takagi, Tetsuya Izu, 2002 .

The Security of Brier-Joye's Addition Formula for Weierstrass-form Elliptic Curves

Tsuyoshi Takagi, Tetsuya Izu, T. Takagi, 2002 .

Efficient Implementation of the η T Pairing on GPU

Tsuyoshi Takagi, Chen-Mou Cheng, Yun-Ju Huang, 2011 .

Product Formula of the Cubic Gauss Sum Modulo the Product of the Primes

Tsuyoshi Takagi, 1997 .

Low exponent attacks against the schwenk-eisfeld cryptoscheme and signature

Shozo Naito, Tsuyoshi Takagi, T. Takagi, 1998 .

Improvement of FPPR method to solve ECDLP

Tsuyoshi Takagi, Yun-Ju Huang, Naoyuki Shinohara, 2015 .

Solving a 676-Bit Discrete Logarithm Problem in GF(3 6 n )

Masaaki Shirase, Tsuyoshi Takagi, Shin'ichiro Matsuo, 2010 .