Randomness Evaluation With the Discrete Fourier Transform Test Based on Exact Analysis of the Reference Distribution. - Hiroki Okada 001; Ken Umeno (IEEE Trans. Inf. Forensics Secur., 2017)

Linear Depth Integer-Wise Homomorphic Division. - Hiroki Okada 001; Carlos Cid; Seira Hidano; Shinsaku Kiyomoto (WISTP, 2018)

Integerwise Functional Bootstrapping on TFHE. - Hiroki Okada 001; Shinsaku Kiyomoto; Carlos Cid (ISC, 2020)

On the Complexity of the LWR-Solving BKW Algorithm. - Hiroki Okada 001; Atsushi Takayasu; Kazuhide Fukushima; Shinsaku Kiyomoto; Tsuyoshi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

A Comparison of GKE Protocols based on SIDH. - Hiroki Okada 001; Shinsaku Kiyomoto; Carlos Cid (SECRYPT, 2021)

Faster Rotation-Based Gauss Sieve for Solving the SVP on General Ideal Lattices. - Shintaro Narisada; Hiroki Okada 001; Kazuhide Fukushima; Shinsaku Kiyomoto (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

A Compact Digital Signature Scheme Based on the Module-LWR Problem. - Hiroki Okada 001; Atsushi Takayasu; Kazuhide Fukushima; Shinsaku Kiyomoto; Tsuyoshi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Integer-Wise Functional Bootstrapping on TFHE: Applications in Secure Integer Arithmetics. - Hiroki Okada 001; Shinsaku Kiyomoto; Carlos Cid (Inf., 2021)

Side-channel Analysis and Countermeasure for Implementation of Lattice-based Signature. - Kazuhide Fukushima; Hiroki Okada 001; Sofiane Takarabt; Amina Korchi; Meziane Hamoud; Khaled Karray; Youssef Souissy; Sylvain Guilley (SECRYPT, 2022)

Erratum: A Compact Digital Signature Scheme Based on the Module-LWR Problem [IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Vol. E104.A (2021), No. 9 pp.1219-1234]. - Hiroki Okada 001; Atsushi Takayasu; Kazuhide Fukushima; Shinsaku Kiyomoto; Tsuyoshi Takagi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022)

Achieving Private Verification in Multi-stakeholder Environment and Application to Stable Matching. - Toru Nakamura; Hiroki Okada 001; Kazuhide Fukushima; Takamasa Isohara (ICEIS (1), 2023)

Revisiting the DFT Test in the NIST SP 800-22 Randomness Test Suite. - Hiroki Okada 001; Kazuhide Fukushima (ICISSP, 2023)

SoK: Towards CCA Secure Fully Homomorphic Encryption. - Hiroki Okada 001; Kazuhide Fukushima (SECRYPT, 2023)

GPU Acceleration of High-Precision Homomorphic Computation Utilizing Redundant Representation. - Shintaro Narisada; Hiroki Okada 001; Kazuhide Fukushima; Shinsaku Kiyomoto; Takashi Nishide (IACR Cryptol. ePrint Arch., 2023)

Spherical Gaussian Leftover Hash Lemma via the Rényi Divergence. - Hiroki Okada 001; Kazuhide Fukushima; Shinsaku Kiyomoto; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 2023)

Homomorphic polynomial evaluation using Galois structure and applications to BFV bootstrapping. - Hiroki Okada 001; Rachel Player; Simon Pohmann (IACR Cryptol. ePrint Arch., 2023)

Towards Practical Doubly-Efficient Private Information Retrieval. - Hiroki Okada 001; Rachel Player; Simon Pohmann; Christian Weinert (IACR Cryptol. ePrint Arch., 2023)

Solving McEliece-1409 in One Day - Cryptanalysis with the Improved BJMM Algorithm. - Shintaro Narisada; Shusaku Uemura; Hiroki Okada 001; Hiroki Furue; Yusuke Aikawa; Kazuhide Fukushima (ISC (2), 2024)

Time-Memory Trade-off Algorithms for Homomorphically Evaluating Look-up Table in TFHE. - Shintaro Narisada; Hiroki Okada 001; Kazuhide Fukushima; Takashi Nishide (IACR Cryptol. ePrint Arch., 2024)

Revisiting the May-Meurer-Thomae Algorithm - Solving McEliece-1409 in One Day. - Shintaro Narisada; Shusaku Uemura; Hiroki Okada 001; Hiroki Furue; Yusuke Aikawa; Kazuhide Fukushima (IACR Cryptol. ePrint Arch., 2024)

On Algebraic Homomorphic Encryption and its Applications to Doubly-Efficient PIR. - Hiroki Okada 001; Rachel Player; Simon Pohmann; Christian Weinert (IACR Cryptol. ePrint Arch., 2024)

Simulation-Secure Threshold PKE from Standard (Ring-)LWE. - Hiroki Okada 001; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 2024)

Private Verification in Multi-stakeholder Environment and its Application to Stable Matching. - Toru Nakamura; Hiroki Okada 001; Kazuhide Fukushima; Takamasa Isohara (SN Comput. Sci., 2024)

Gram Root Decomposition over the Polynomial Ring: Application to Sphericalization of Discrete Gaussian. - Hiroki Okada 001; Tsuyoshi Takagi (ICISSP (2), 2025)

Fheanor: a new, modular FHE library for designing and optimising schemes. - Hiroki Okada 001; Rachel Player; Simon Pohmann (IACR Cryptol. ePrint Arch., 2025)

Low Communication Threshold FHE from Standard (Module-)LWE. - Hiroki Okada 001; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 2025)