## 2021 -

### 2022

- Reo Eriguchi, Atsunori Ichikawa, Noboru Kunihiro, Koji Nuida, "Efficient Noise Generation Protocols for Differentially Private Multiparty Computation", IEEE Transactions on Dependable and Secure Computing, to appear.
- Kohei Nakagawa, Hiroshi Onuki, Atsushi Takayasu, Tsuyoshi Takagi, "L1-Norm Ball for CSIDH: Optimal Strategy for Choosing the Secret Key Space", Discrete Applied Mathematics, to appear.
- Keitaro Hiwatashi, Koji Nuida, "Explicit and Nearly Tight Lower Bound for 2-party Perfectly Secure FSS", 21st International Conference on Applied Cryptography and Network Security, ACNS 2023, to appear.
- Kyoichi Asano, Keita Emura, Atsushi Takayasu, "More Efficient Adaptively Secure Lattice-based IBE with Equality Test in the Standard Model", The 24th International Conference on Information Security, ISC 2022, to appear.
- Keita Emura, Atsushi Takayasu, "A Generic Construction of CCA-secure Identity-based Encryption with Equality Test against Insider Attacks", IEICE Transactions, to appear.
- Reo Eriguchi, Kaoru Kurosawa, Koji Nuida, "On the Optimal Communication Complexity of Error-Correcting Multi-Server PIR", The twentieth Theory of Cryptography Conference, TCC 2022, to appear.
- Reo Eriguchi, Noboru Kunihiro, Koji Nuida, "Linear Algebraic Approach to Strongly Secure Ramp Secret Sharing for General Access Structures with Application to Symmetric PIR", IEICE Transactions, to appear.
- Yasuhiko Ikematsu, Shuhei Nakamura, Tsuyoshi Takagi, "Recent Progress in the Security Evaluation of Multivariate Public-Key Cryptography", IET Information Security, to appear.
- Kaisei Kajita, Go Ohtake, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi, "Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption", IEICE Transactions, to appear.
- Shinya Okumura, Shusaku Uemura, Momonari Kudo, "Revisiting Lattice-Based Attacks Using Trace Map for Ring-LWE", 2022 International Symposium on Information Theory and Its Applications, ISITA 2022, to appear.
- Momonari Kudo, Shushi Harashita, "Algorithmic study of superspecial hyperelliptic curves over finite fields" Commentarii mathematici Universitatis Sancti Pauli, to appear.
- Ryo Ohashi, Momonari Kudo, Shushi Harashita, "Fast enumeration of superspecial hyperelliptic curves of genus 4 with automorphism group V4", International Workshop on the Arithmetic of Finite Fields, WAIFI 2022, to appear.
- Jintai Ding, Seungki Kim, TsuyoshiTakagi, Yuntao Wang, Bo-yin Yang, "A Physical Study of the LLL Algorithm", Journal of Number Theory, Vol.244, pp.339-368, 2023.
- Momonari Kudo, Shushi Harashita, "Superspecial Trigonal Curves of Genus 5", Experimental Mathematics, Vol.31(3), pp.908-919, 2022.
- Kyoichi Asano, Keita Emura, Atsushi Takayasu, and Yohei Watanabe, "A Generic Construction of CCA-secure Attribute-based Encryption with Equality Test", The 16th International Conference on Provable and Practical Security, ProvSec 2022, LNCS 13600, pp. 3–19, 2022.
- Daichi Aoki, Kazuhiko Minematsu, Toshihiko Okamura, Tsuyoshi Takagi, "Efficient Word Size Modular Multiplication over Signed Integers", 29th IEEE Symposium on Computer Arithmetic, ARITH 2022, pp.94-101, 2022. (pdf)
- Hiroki Furue, Yutaro Kiyomura, Tatsuya Nagasawa, Tsuyoshi Takagi, "A New Fault Attack on UOV Multivariate Signature Scheme", 13th International Conference on Post-Quantum Cryptography, PQCrypto 2022, LNCS 13512, pp.124–143, 2022.
- Tomoki Moriya, Hiroshi Onuki, Yusuke Aikawa, Tsuyoshi Takagi, "The Generalized Montgomery Coordinate: A New Computational Tool for Isogeny-based Cryptography", 4th International Workshop on Mathematical Cryptology, MathCrypt 2022, 2022. (pdf)
- Hiroshi Onuki, "On the key generation in SQISign", Number-Theoretic Methods in Cryptology, NuTMiC 2021, 2022. (pdf)
- Hiroki Furue, Momonari Kudo, "On the computational enumeration of superspecial curves: A survey and complements (extended abstract)", Computer Algebra in Scientific Computing 2022, CASC 2022, 2022. (pdf)
- Tasuku Nakagawa, Momonari Kudo, Tsuyoshi Takagi, "Efficient search for superspecial hyperelliptic curves of genus 4 in large characteristic (extended abstract)", Computer Algebra in Scientific Computing 2022, CASC 2022, 2022. (pdf)
- Kosuke Sakata, Momonari Kudo, Taku Kato, Kazuhiro Yokoyama, "Implementation report on computing Groebner bases over exterior algebra (extended abstract)", Computer Algebra in Scientific Computing 2022, CASC 2022, 2022. (pdf)
- Taku Kato, Yutaro Kiyomura, Tsuyoshi Takagi, "Improving Fault Attacks on Rainbow with Fixing Random Vinegar Values", 17th International Workshop on Security, IWSEC 2022, LNCS 13504, pp.147-165, 2022.
- Hirotomo Shinoki, Koji Nuida, "On Extension of Evaluation Algorithms in Keyed-Homomorphic Encryption". 17th International Workshop on Security, IWSEC 2022, LNCS 13504, pp.189–207, 2022.
- Nariyasu Heseri, Koji Nuida, "Computational Irrelevancy: Bridging the Gap Between Pseudo- and Real Randomness in MPC Protocols", 17th International Workshop on Security, IWSEC 2022, LNCS 13504, pp.208–223, 2022.
- Shu Takahashi, Hiroshi Onuki, Tsuyoshi Takagi, "Explicit Construction of the Square-root Vélu's Formula on Edwards Curves", JSIAM Letters, Vol.14, pp.108–110, 2022.
- Reo Eriguchi, Kaoru Kurosawa, Koji Nuida, "Multi-Server PIR with Full Error Detection and Limited Error Correction", 3rd Conference on Information-Theoretic Cryptography, ITC 2022, pp.1:1-1:20, 2022.
- Shingo Sato, Keita Emura, Atsushi Takayasu, "Keyed-Fully Homomorphic Encryption without Indistinguishability Obfuscation", 20th International Conference on Applied Cryptography and Network Security, ACNS 2022, LNCS 13269, pp.3-23, 2022.
- Keisuke Hakuta, Hiroyuki Ochiai, Tsuyoshi Takagi, "Comments on Efficient Batch Verification Test for Digital Signatures based on Elliptic Curves", Mathematica Slovaca, Vol.72, No.3, pp.575-590, 2022.
- Yuta Kambe, Masaya Yasuda, Masayuki Noro, Kazuhiro Yokoyama, Yusuke Aikawa, Katsuyuki Takashima, Momonari Kudo, "Solving the Constructive Deuring Correspondence via the Kohel-Lauter-Petit-Tignol Algorithm", Mathematical Cryptology, Vol.1, No.2, pp.10–24, 2022.
- Yuta Kambe, Yusuke Aikawa, Momonari Kudo, Masaya Yasuda, Katsuyuki Takashima, Kazuhiro Yokoyama, "Implementation report of the Kohel-Lauter-Petit-Tignol algorithm for the constructive Deuring correspondence", 7th International Conference on Mathematics and Computing, ICMC2021, AISC 1412, pp.953-966, 2022.
- Keitaro Hiwatashi, Satsuya Ohata, Koji Nuida, "An Efficient Secure Division Protocol Using Approximate Multi-Bit Product and New Constant-Round Building Blocks", IEICE Transactions, Vol.E105.A, pp.404-416, 2022.
- Hiroshi Onuki, Tomoki Moriya, "Radical Isogenies on Montgomery Curves", 25th International Conference on Practice and Theory of Public Key Cryptography, PKC 2022, LNCS 13177, pp.473-497, 2022.
- Yuji Hashimoto, Koji Nuida, Goichiro Hanaoka, "Tight Security of Twin-DH Hashed ElGamal KEM in Multi-user Setting", IEICE Transactions, Vol.E105.A, No.3, pp.173-181, 2022.
- Xiaoling Yu, Yuntao Wang, Chungen Xu, Tsuyoshi Takagi, "Revisiting the Orthogonal Lattice Algorithm in Solving General Approximate Common Divisor Problem", IEICE Transactions, Vol.E105.A, No.3, pp.195-202, 2022.
- Pengfei Wang, Xiangyu Su, Maxim Jourenko, Zixian Jiang, Mario Larangeira, Keisuke Tanaka, "Environmental Adaptive Privacy Preserving Contact Tracing System for Respiratory Infectious Diseases", The 13th International Symposium on Cyberspace Safety and Security, CSS 2021, LNCS 13172, pp.131-144, 2022.

### 2021

- Reo Eriguchi, Koji Nuida, "Homomorphic Secret Sharing for Multipartite and General Adversary Structures Supporting Parallel Evaluation of Low-Degree Polynomials", the 27th Annual International Conference on the Theory and Application of Cryptology and Information Security, Asiacrypt 2021, LNCS 13091, pp.191-221, 2021.
- Hiroki Furue, Yasuhiko Ikematsu, Yutaro Kiyomura, Tsuyoshi Takagi, "A New Variant of Unbalanced Oil and Vinegar Using Quotient Ring: QR-UOV", the 27th Annual International Conference on the Theory and Application of Cryptology and Information Security, Asiacrypt 2021, LNCS 13093, pp.187-217, 2021.
- Shuhei Nakamura, Yasuhiko Ikematsu, Yacheng Wang, Jintai Ding, Tsuyoshi Takagi, "New complexity estimation on the Rainbow-Band-Separation attack", Theoretical Computer Science, Vol.896, pp.1-18, 2021.
- Momonari Kudo, "Computing representation matrices for the Frobenius on cohomology groups", Journal of Symbolic Computation, Vol.109, pp.441-464, 2022.
- Shusaku Uemura, Kazuhide Fukushima, Shinsaku Kiyomoto, Momonari Kudo, Tsuyoshi Takagi, "Shortest Vectors in Lattices of Bai-Galbraith's Embedding Attack on the LWR Problem", 16th International Workshop on Security, IWSEC 2021, LNCS 12835, pp.23-41, 2021.
- Changze Yin, Yacheng Wang, Tsuyoshi Takagi, "Simple Matrix Signature Scheme", 16th International Workshop on Security, IWSEC 2021, LNCS 12835, pp.227-237, 2021.
- Yuji Hashimoto, Koji Nuida, "Improved Supersingularity Testing of Elliptic Curves Using Legendre Form", Computer Algebra in Scientific Computing 2021, CASC 2021, LNCS 12865, pp.121-135, 2021.
- Reo Eriguchi, Atsunori Ichikawa, Noboru Kunihiro, Koji Nuida, "Efficient Noise Generation to Achieve Differential Privacy with Applications to Secure Multiparty Computation", Twenty-Fifth International Conference on Financial Cryptography and Data Security, FC 2021, LNCS 12674, pp.271-290, 2021.
- Reo Eriguchi, Kazuma Ohara, Shota Yamada, Koji Nuida, "Non-Interactive Secure Multiparty Computation for Symmetric Functions, Revisited: More Efficient Constructions and Extensions", The 41st Annual International Cryptology Conference, CRYPTO2021, LNCS 12826, pp.305-334, 2021.
- Hiroki Furue, Shuhei Nakamura, Tsuyoshi Takagi, "Improving Thomae-Wolf Algorithm for Solving Underdetermined Multivariate Quadratic Polynomial Problem", 12th International Workshop on Post-Quantum Cryptography, PQCrypto 2021, LNCS 12841, pp.65-78, 2021.
- Momonari Kudo, Shushi Harashita, "Parametrizing generic curves of genus five and its application to finding curves with many rational points", Effective Methods in Algebraic Geometry 2021, MEGA2021, 2021. (pdf)
- Yuji Hashimoto, Katsuyuki Takashima, "Improved supersingularity testing of elliptic curves", JSIAM Letters, Vol.13, pp.29-32, 2021.
- Hiroki Okada, Atsushi Takayasu, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi, "A Compact Digital Signature Scheme Based on the Module-LWR problem", IEICE Transactions, Vol.E104–A, No.9, pp.1219-1234, 2021.
- Keitaro Hiwatashi, Ken Ogura, Satsuya Ohata, Koji Nuida, "Accelerating Secure (2+1)-Party Computation by Insecure but Efficient Building Blocks", The 16th ACM ASIA Conference on Computer and Communications Security, AsiaCCS 2021, pp.616–627, 2021.
- Ye Yuan, Kazuhide Fukushima, Junting Xiao, Shinsaku Kiyomoto, Tsuyoshi Takagi, "Memory-Constrained Implementation of Lattice-based Encryption Scheme on Standard Java Card Platform", IET Information Security, Vol.15, pp.267-281, 2021.
- Koji Nuida, "Cryptographic Pseudorandom Generators Can Make Cryptosystems Problematic", 24th International Conference on Practice and Theory of Public-Key Cryptography, PKC 2021, LNCS 12711, pp.441-468, 2021.
- Yuntao Wang, Tsuyoshi Takagi, "Studying Lattice Reduction Algorithms Improved by Quick Reordering Technique", International Journal of Information Security, Vol.20, pp.257-268, 2021.
- Tomoki Kawashima, Katsuyuki Takashima, Yusuke Aikawa, Tsuyoshi Takagi, "An Efficient Authenticated Key Exchange from Random Self-Reducibility on CSIDH", The 23rd Annual International Conference on Information Security and Cryptology, ICISC 2020, LNCS 12593, pp.58-84, 2021.
- Bernhard Mühlherr and Koji Nuida, "Locally Finite Continuations and Coxeter Groups of Infinite Ranks", Journal of Pure and Applied Algebra, Vol.225, Article 106464, 2021.
- Hiroshi Onuki, "On oriented supersingular elliptic curves", Finite Fields and Their Applications, Vol 69, Article 101777, 2021.
- Kazumasa Shinagawa, Koji Nuida, "A Single Shuffle Is Enough for Secure Card-Based Computation of Any Boolean Circuit", Discrete Applied Mathematics, Vol.289, pp.248-261, 2021.