Shinya Okumura

16 papers C 2Misc 4Journal 4Unranked 4
YearRankTypeTitle / Venue / Authors
2025 — conf
An Attack on Ring-LWE Using a Dynamically Adjustable Block Size BKW Algorithm.
AsiaJCIS
Kenjiro Hirose, Shinya Okumura, Atsuko Miyaji
2024 — conf
Consideration on Defining Field for Efficient Ring-LWE.
AsiaJCIS
Rintaro Yamada, Shinya Okumura, Atsuko Miyaji
2023 J jnl
On the Weakness of Non-Dual Ring-LWE Mod Prime Ideal q by Trace Map.
IEICE Trans. Inf. Syst.
Tomoka Takahashi, Shinya Okumura, Atsuko Miyaji
2023 — conf
Revisiting an Extension of Kannan's Embedding for Ring-LWE.
MobiSec
Satoshi Uesugi, Shinya Okumura, Atsuko Miyaji
2022 Misc conf
On the Weakness of Ring-LWE mod Prime Ideal $\mathfrak {q}$ by Trace Map.
SAC
Tomoka Takahashi, Shinya Okumura, Atsuko Miyaji
2022 C conf
Revisiting Lattice-Based Attacks Using Trace Map for Ring-LWE.
ISITA
Shinya Okumura, Shusaku Uemura, Momonari Kudo
2020 — ch.
Cryptography Core Technology.
Security Infrastructure Technology for Integrated Utilization of Big Data
Chen-Mou Cheng, Kenta Kodera, Atsuko Miyaji, Shinya Okumura
2019 Misc conf
An Improved Security Analysis on an Indeterminate Equation Public Key Cryptosystem by Evaluation Attacks.
SAC
Akifumi Muroi, Shinya Okumura, Atsuko Miyaji
2018 C conf
An Experimental Analysis on Lattice Attacks against Ring-LWE over Decomposition Fields.
ISITA
Shota Terada, Hideto Nakano, Shinya Okumura, Atsuko Miyaji
2017 Misc conf
A Public-Key Encryption Scheme Based on Non-linear Indeterminate Equations.
SAC
Koichiro Akiyama, Yasuhiro Goto, Shinya Okumura, Tsuyoshi Takagi, Koji Nuida, Goichiro Hanaoka
2017 J jnl
A Public-key Encryption Scheme Based on Non-linear Indeterminate Equations (Giophantus).
IACR Cryptol. ePrint Arch.
Koichiro Akiyama, Yasuhiro Goto, Shinya Okumura, Tsuyoshi Takagi, Koji Nuida, Goichiro Hanaoka, Hideo Shimizu, Yasuhiko Ikematsu
2017 — ch.
On Analysis of Recovering Short Generator Problems via Upper and Lower Bounds of Dirichlet L-functions: Part 2.
CREST Crypto-Math Project
Shinya Okumura
2016 — conf
An Estimate of the Complexity of the Section Finding Problem on Algebraic Surfaces.
CANDAR
Shinya Okumura, Koichiro Akiyama, Tsuyoshi Takagi
2016 Misc conf
Cryptanalysis of a Public Key Cryptosystem Based on Diophantine Equations via Weighted LLL Reduction.
IWSEC
Jintai Ding, Momonari Kudo, Shinya Okumura, Tsuyoshi Takagi, Chengdong Tao
2015 J jnl
Cryptanalysis of a public key cryptosystem based on Diophantine equations via weighted LLL reduction.
IACR Cryptol. ePrint Arch.
Jintai Ding, Momonari Kudo, Shinya Okumura, Tsuyoshi Takagi, Chengdong Tao
2015 J jnl
Security Analysis of Cryptosystems Using Short Generators over Ideal Lattices.
IACR Cryptol. ePrint Arch.
Shinya Okumura, Shingo Sugiyama, Masaya Yasuda, Tsuyoshi Takagi