Shinya Okumura

According to our database, Shinya Okumura authored at least 14 papers between 2015 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2024

Consideration on Defining Field for Efficient Ring-LWE.

Rintaro Yamada, Shinya Okumura, Atsuko Miyaji

Proceedings of the 19th Asia Joint Conference on Information Security, 2024

2023

On the Weakness of Non-Dual Ring-LWE Mod Prime Ideal q by Trace Map.

Tomoka Takahashi, Shinya Okumura, Atsuko Miyaji

IEICE Trans. Inf. Syst., September, 2023

Revisiting an Extension of Kannan's Embedding for Ring-LWE.

Satoshi Uesugi, Shinya Okumura, Atsuko Miyaji

Proceedings of the Mobile Internet Security - 7th International Conference, 2023

2022

On the Weakness of Ring-LWE mod Prime Ideal $\mathfrak {q}$ by Trace Map.

Tomoka Takahashi, Shinya Okumura, Atsuko Miyaji

Proceedings of the Selected Areas in Cryptography - 29th International Conference, 2022

Revisiting Lattice-Based Attacks Using Trace Map for Ring-LWE.

Shinya Okumura, Shusaku Uemura, Momonari Kudo

Proceedings of the International Symposium on Information Theory and Its Applications, 2022

2020

Cryptography Core Technology.

Chen-Mou Cheng, Kenta Kodera, Atsuko Miyaji, Shinya Okumura

Proceedings of the Security Infrastructure Technology for Integrated Utilization of Big Data, 2020

2019

An Improved Security Analysis on an Indeterminate Equation Public Key Cryptosystem by Evaluation Attacks.

Akifumi Muroi, Shinya Okumura, Atsuko Miyaji

Proceedings of the Selected Areas in Cryptography - SAC 2019, 2019

2018

An Experimental Analysis on Lattice Attacks against Ring-LWE over Decomposition Fields.

Shota Terada, Hideto Nakano, Shinya Okumura, Atsuko Miyaji

Proceedings of the International Symposium on Information Theory and Its Applications, 2018

2017

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

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

Koichiro Akiyama, Yasuhiro Goto, Shinya Okumura, Tsuyoshi Takagi, Koji Nuida, Goichiro Hanaoka

Proceedings of the Selected Areas in Cryptography - SAC 2017, 2017

On Analysis of Recovering Short Generator Problems via Upper and Lower Bounds of Dirichlet L-functions: Part 2.

Shinya Okumura

Proceedings of the Mathematical Modelling for Next-Generation Cryptography: CREST Crypto-Math Project, 2017

2016

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

Shinya Okumura, Koichiro Akiyama, Tsuyoshi Takagi

Proceedings of the Fourth International Symposium on Computing and Networking, 2016

2015

Security Analysis of Cryptosystems Using Short Generators over Ideal Lattices.

Shinya Okumura, Shingo Sugiyama, Masaya Yasuda, Tsuyoshi Takagi

IACR Cryptol. ePrint Arch., 2015

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

Jintai Ding, Momonari Kudo, Shinya Okumura, Tsuyoshi Takagi, Chengdong Tao

IACR Cryptol. ePrint Arch., 2015