| 2025 | ASIACRYPT | The Security of ML-DSA Against Fault-Injection Attacks. | Haruhisa Kosuge, Keita Xagawa |
| 2025 | PKC | The Security of Hash-and-Sign with Retry Against Superposition Attacks. | Haruhisa Kosuge, Keita Xagawa |
| 2025 | SP | Post-Quantum Cryptographic Analysis of SSH. | Benjamin Bencina, Benjamin Dowling, Varun Maram, Keita Xagawa |
| 2024 | EuroCrypt | Signatures with Memory-Tight Security in the Quantum Random Oracle Model. | Keita Xagawa |
| 2024 | ISITA | Chameleon Hashing Security Enhancement to Hierarchical Identity-Based Identification. | Atsushi Fujioka, Keisuke Saito, Taiichi Saito, Keita Xagawa |
| 2024 | PKC | Probabilistic Hash-and-Sign with Retry in the Quantum Random Oracle Model. | Haruhisa Kosuge, Keita Xagawa |
| 2023 | PKC | Post-quantum Anonymity of Kyber. | Varun Maram, Keita Xagawa |
| 2022 | EuroCrypt | Anonymity of NIST PQC Round 3 KEMs. | Keita Xagawa |
| 2021 | ASIACRYPT | Fault-Injection Attacks Against NIST's Post-Quantum Cryptography Round 3 KEM Candidates. | Keita Xagawa, Akira Ito, Rei Ueno, Junko Takahashi, Naofumi Homma |
| 2020 | ASIACRYPT | Non-committing Encryption with Constant Ciphertext Expansion from Standard Assumptions. | Yusuke Yoshida, Fuyuki Kitagawa, Keita Xagawa, Keisuke Tanaka |
| 2020 | CCS | ModFalcon: Compact Signatures Based On Module-NTRU Lattices. | Chitchanok Chuengsatiansup, Thomas Prest, Damien Stehl, Alexandre Wallet, Keita Xagawa |
| 2019 | ASIACRYPT | Quantum Random Oracle Model with Auxiliary Input. | Minki Hhan, Keita Xagawa, Takashi Yamakawa |
| 2019 | PQCrypto | Improved Quantum Multicollision-Finding Algorithm. | Akinori Hosoyamada, Yu Sasaki, Seiichiro Tani, Keita Xagawa |
| 2019 | PQCrypto | (Tightly) QCCA-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model. | Keita Xagawa, Takashi Yamakawa |
| 2018 | EuroCrypt | Tightly-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model. | Tsunekazu Saito, Keita Xagawa, Takashi Yamakawa |
| 2018 | PQCrypto | Practical Cryptanalysis of a Public-Key Encryption Scheme Based on Non-linear Indeterminate Equations at SAC 2017. | Keita Xagawa |
| 2017 | ASIACRYPT | Quantum Multicollision-Finding Algorithm. | Akinori Hosoyamada, Yu Sasaki, Keita Xagawa |
| 2017 | SIGMOD | Cryptanalysis of Comparable Encryption in SIGMOD'16. | Caleb Horst, Ryo Kikuchi, Keita Xagawa |
| 2016 | ASIACRYPT | Public-Key Cryptosystems Resilient to Continuous Tampering and Leakage of Arbitrary Functions. | Eiichiro Fujisaki, Keita Xagawa |
| 2015 | ACNS | Accumulable Optimistic Fair Exchange from Verifiably Encrypted Homomorphic Signatures. | Jae Hong Seo, Keita Emura, Keita Xagawa, Kazuki Yoneyama |
| 2014 | PKC | Practical Cryptanalysis of a Public-Key Encryption Scheme Based on New Multivariate Quadratic Assumptions. | Martin R. Albrecht, Jean-Charles Faugre, Robert Fitzpatrick, Ludovic Perret, Yosuke Todo, Keita Xagawa |
| 2014 | PKC | Re-encryption, Functional Re-encryption, and Multi-hop Re-encryption: A Framework for Achieving Obfuscation-Based Security and Instantiations from Lattices. | Nishanth Chandran, Melissa Chase, Feng-Hao Liu, Ryo Nishimaki, Keita Xagawa |
| 2013 | CCS | Practical and post-quantum authenticated key exchange from one-way secure key encapsulation mechanism. | Atsushi Fujioka, Koutarou Suzuki, Keita Xagawa, Kazuki Yoneyama |
| 2013 | PKC | Verifiably Encrypted Signatures with Short Keys Based on the Decisional Linear Problem and Obfuscation for Encrypted VES. | Ryo Nishimaki, Keita Xagawa |
| 2013 | PKC | Improved (Hierarchical) Inner-Product Encryption from Lattices. | Keita Xagawa |
| 2012 | ACNS | Security Enhancements by OR-Proof in Identity-Based Identification. | Atsushi Fujioka, Taiichi Saito, Keita Xagawa |
| 2012 | CANS | Applicability of OR-Proof Techniques to Hierarchical Identity-Based Identification. | Atsushi Fujioka, Taiichi Saito, Keita Xagawa |
| 2012 | ICICS | Security Enhancement of Identity-Based Identification with Reversibility. | Atsushi Fujioka, Taiichi Saito, Keita Xagawa |
| 2012 | PKC | Strongly Secure Authenticated Key Exchange from Factoring, Codes, and Lattices. | Atsushi Fujioka, Koutarou Suzuki, Keita Xagawa, Kazuki Yoneyama |
| 2010 | PKC | Security of Encryption Schemes in Weakened Random Oracle Models. | Akinori Kawachi, Akira Numayama, Keisuke Tanaka, Keita Xagawa |
| 2009 | ASIACRYPT | Efficient Public Key Encryption Based on Ideal Lattices. | Damien Stehl, Ron Steinfeld, Keisuke Tanaka, Keita Xagawa |
| 2009 | ProvSec | Zero-Knowledge Protocols for NTRU: Application to Identification and Proof of Plaintext Knowledge. | Keita Xagawa, Keisuke Tanaka |
| 2008 | ASIACRYPT | Concurrently Secure Identification Schemes Based on the Worst-Case Hardness of Lattice Problems. | Akinori Kawachi, Keisuke Tanaka, Keita Xagawa |
| 2007 | PKC | Multi-bit Cryptosystems Based on Lattice Problems. | Akinori Kawachi, Keisuke Tanaka, Keita Xagawa |