Revisiting the Efficient Key Generation of ZHFE. - Yasuhiko Ikematsu; Dung Hoang Duong; Albrecht Petzoldt; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 2016)

A Public-key Encryption Scheme Based on Non-linear Indeterminate Equations (Giophantus). - Koichiro Akiyama; Yasuhiro Goto; Shinya Okumura; Tsuyoshi Takagi; Koji Nuida; Goichiro Hanaoka; Hideo Shimizu; Yasuhiko Ikematsu (IACR Cryptol. ePrint Arch., 2017)

Efficient Decryption Algorithms for Extension Field Cancellation Type Encryption Schemes. - Yacheng Wang; Yasuhiko Ikematsu; Dung Hoang Duong; Tsuyoshi Takagi (ACISP, 2018)

An Improvement on the Linear Algebraic Attack for the Indeterminate Equation Encryption Scheme. - Yasuhiko Ikematsu; Koichiro Akiyama; Tsuyoshi Takagi (ISITA, 2018)

HFERP - A New Multivariate Encryption Scheme. - Yasuhiko Ikematsu; Ray A. Perlner; Daniel Smith-Tone; Tsuyoshi Takagi; Jeremy Vates (PQCrypto, 2018)

An Efficient Key Generation of ZHFE Public Key Cryptosystem. - Yasuhiko Ikematsu; Dung Hoang Duong; Albrecht Petzoldt; Tsuyoshi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018)

The Secure Parameters and Efficient Decryption Algorithm for Multivariate Public Key Cryptosystem EFC. - Yacheng Wang; Yasuhiko Ikematsu; Dung Hoang Duong; Tsuyoshi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)

Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 2017. - Yasufumi Hashimoto; Yasuhiko Ikematsu; Tsuyoshi Takagi (J. Inf. Process., 2019)

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

Cryptanalysis of GiophantusTM Schemes against Hybrid Attack. - Yuntao Wang 002; Yasuhiko Ikematsu; Koichiro Akiyama; Tsuyoshi Takagi (APKC@AsiaCCS, 2020)

Dynamic Self-dual DeepBKZ Lattice Reduction with Free Dimensions. - Satoshi Nakamura 004; Yasuhiko Ikematsu; Masaya Yasuda (ICMC, 2020)

Solving the Search-LWE Problem by Lattice Reduction over Projected Bases. - Satoshi Nakamura 004; Nariaki Tateiwa; Koha Kinjo; Yasuhiko Ikematsu; Masaya Yasuda; Katsuki Fujisawa (ICMC, 2020)

A Structural Attack on Block-Anti-Circulant UOV at SAC 2019. - Hiroki Furue; Koha Kinjo; Yasuhiko Ikematsu; Yacheng Wang; Tsuyoshi Takagi (PQCrypto, 2020)

Revisiting the Minrank Problem on Multivariate Cryptography. - Yacheng Wang; Yasuhiko Ikematsu; Shuhei Nakamura; Tsuyoshi Takagi (WISA, 2020)

A New Variant of Unbalanced Oil and Vinegar Using Quotient Ring: QR-UOV. - Hiroki Furue; Yasuhiko Ikematsu; Yutaro Kiyomura; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 2020)

Security Analysis Against "A New Encryption Scheme for Multivariate Quadratic Systems". - Yasuhiko Ikematsu; Shuhei Nakamura (IACR Cryptol. ePrint Arch., 2020)

Analysis on the MinRank Attack using Kipnis-Shamir Method Against Rainbow. - Shuhei Nakamura; Yacheng Wang; Yasuhiko Ikematsu (IACR Cryptol. ePrint Arch., 2020)

Security Analysis on an ElGamal-Like Multivariate Encryption Scheme Based on Isomorphism of Polynomials. - Yasuhiko Ikematsu; Shuhei Nakamura; Bagus Santoso; Takanori Yasuda (Inscrypt, 2021)

A Study on Randomness Used in Signature Generation of UOV. - Yasuhiko Ikematsu (ICMC, 2021)

Security Analysis via Algebraic Attack Against "A New Encryption Scheme for Multivariate Quadratic System". - Yasuhiko Ikematsu; Shuhei Nakamura (ICMC, 2021)

A Trace Map Attack Against Special Ring-LWE Samples. - Yasuhiko Ikematsu; Satoshi Nakamura 004; Masaya Yasuda (IWSEC, 2021)

Security Analysis on an El-Gamal-like Multivariate Encryption Scheme Based on Isomorphism of Polynomials. - Yasuhiko Ikematsu; Shuhei Nakamura; Bagus Santoso; Takanori Yasuda (IACR Cryptol. ePrint Arch., 2021)

Algebraic approaches for solving isogeny problems of prime power degrees. - Yasushi Takahashi; Momonari Kudo; Ryoya Fukasaku; Yasuhiko Ikematsu; Masaya Yasuda; Kazuhiro Yokoyama (J. Math. Cryptol., 2021)

New complexity estimation on the Rainbow-Band-Separation attack. - Shuhei Nakamura; Yasuhiko Ikematsu; Yacheng Wang; Jintai Ding; Tsuyoshi Takagi (Theor. Comput. Sci., 2021)

Three-Pass Identification Scheme Based on MinRank Problem with Half Cheating Probability. - Bagus Santoso; Yasuhiko Ikematsu; Shuhei Nakamura; Takanori Yasuda (ISITA, 2022)

Lattice-Based Public Key Cryptosystems Invoking Linear Mapping Mask. - Yuntao Wang 002; Yasuhiko Ikematsu; Takanori Yasuda (ProvSec, 2022)

A New Security Analysis Against MAYO and QR-UOV Using Rectangular MinRank Attack. - Hiroki Furue; Yasuhiko Ikematsu (IWSEC, 2023)

A security analysis on MQ-Sign. - Yasuhiko Ikematsu; Hyungrok Jo; Takanori Yasuda (IACR Cryptol. ePrint Arch., 2023)

A New Analysis of the Kipnis-Shamir Method Solving the MinRank Problem. - Shuhei Nakamura; Yacheng Wang; Yasuhiko Ikematsu (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2023)

Recent progress in the security evaluation of multivariate public-key cryptography. - Yasuhiko Ikematsu; Shuhei Nakamura; Tsuyoshi Takagi (IET Inf. Secur., 2023)

Parameterizing Time-Memory Trade-Off for Flexible Implementation of CRYSTALS-Dilithium. - Yasushi Takahashi; Naohisa Nishida; Yuji Unagami; Saburo Toyonaga; Naoto Yanai; Yasuhiko Ikematsu; Koji Nuida; Masaya Yasuda (SecITC, 2024)

Revisiting the security analysis of SNOVA. - Yasuhiko Ikematsu; Rika Akiyama (IACR Cryptol. ePrint Arch., 2024)

Hilbert Series for Systems of UOV Polynomials. - Yasuhiko Ikematsu; Tsunekazu Saito (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

A New Cryptanalysis Against UOV-Based Variants MAYO, QR-UOV and VOX. - Hiroki Furue; Yasuhiko Ikematsu (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2025)