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Dummy Backdoor as a Defense: Removing Unknown Backdoors via Shared Internal Mechanisms for Generative LLMs
Peer-reviewed
Kazuki Iwahana, Masaru Matsubayashi, Takuma Koyama, Toshiki Shibahara, Kenichiro Ominato, Akira Ito
Findings of The 2026 Conference on Empirical Methods in Natural Language Processing (EMNLP) 2026/10
-
Is the Hard-Label Cryptanalytic Model Extraction Really Polynomial?
Peer-reviewed
Akira Ito, Takayuki Miura, Yosuke Todo
The 46th Annual International Cryptology Conference (CRYPTO 2026) 2026/08
-
A Formal Security Proof of Masking: Reduction from Strong Noisy Leakage to Probing Model without Random Probing and Application to LR Primitive
Peer-reviewed
Rei Ueno, Akiko Inoue, Kazuhiko Minematsu, Akira Ito, Naofumi Homma
The 46th Annual International Cryptology Conference (CRYPTO 2026) 2026/08
-
Do We Really Need Permutations? Impact of Model Width on Linear Mode Connectivity
Peer-reviewed
Akira Ito, Masanori Yamada, Daiki Chijiwa, Atsutoshi Kumagai
The Fourteenth International Conference on Learning Representations (ICLR) abs/2510.08023 2026/04
DOI：
10.48550/arXiv.2510.08023
-
Linear Mode Connectivity between Multiple Models modulo Permutation Symmetries.
Peer-reviewed
Akira Ito, Masanori Yamada, Atsutoshi Kumagai
Forty-second International Conference on Machine Learning (ICML) 2025
-
All You Need is XOR-Convolution: A Generalized Higher-Order Side-Channel Attack with Application to XEX/XE-based Encryptions.
Peer-reviewed
Rei Ueno, Akira Ito, Yosuke Todo, Akiko Inoue, Kazuhiko Minematsu, Hibiki Ishikawa, Naofumi Homma
IACR Transactions on Cryptographic Hardware and Embedded Systems 2025 (3) 317-360 2025
DOI：
10.46586/tches.v2025.i3.317-360
-
Analysis of Linear Mode Connectivity via Permutation-Based Weight Matching: With Insights into Other Permutation Search Methods.
Peer-reviewed
Akira Ito, Masanori Yamada, Atsutoshi Kumagai
The Thirteenth International Conference on Learning Representations (ICLR) 2025
-
Perceived Information Revisited II Information-Theoretical Analysis of Deep-Learning Based Side-Channel Attacks.
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma
IACR Trans. Cryptogr. Hardw. Embed. Syst. 2025 (1) 450-474 2024/12
DOI：
10.46586/tches.v2025.i1.450-474
-
Multiple-Valued Plaintext-Checking Side-Channel Attacks on Post-Quantum KEMs
Peer-reviewed
Yutaro Tanaka, Rei Ueno, Keita Xagawa, Akira Ito, Junko Takahashi, Naofumi Homma
IACR Transactions on Cryptographic Hardware and Embedded Systems 2023 (3) 473-503 2023/06/09
DOI：
10.46586/tches.v2023.i3.473-503
eISSN：
2569-2925
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On the Success Rate of Side-Channel Attacks on Masked Implementations: Information-Theoretical Bounds and Their Practical Usage
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma
Proceedings of the ACM Conference on Computer and Communications Security 1521-1535 2022/11/07
Publisher:
DOI：
10.1145/3548606.3560579
ISSN：
1543-7221
-
One Truth Prevails: A Deep-learning Based Single-Trace Power Analysis on RSA–CRT with Windowed Exponentiation
Peer-reviewed
Kotaro Saito, Akira Ito, Rei Ueno, Naofumi Homma
IACR Transactions on Cryptographic Hardware and Embedded Systems 490-526 2022/08/31
Publisher:
Universitatsbibliothek der Ruhr-Universitat Bochum
DOI：
10.46586/tches.v2022.i4.490-526
eISSN：
2569-2925
-
Perceived Information Revisited New Metrics to Evaluate Success Rate of Side-Channel Attacks
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma
IACR Transactions on Cryptographic Hardware and Embedded Systems 2022 (4) 228-254 2022/08/31
Publisher:
DOI：
10.46586/tches.v2022.i4.228-254
eISSN：
2569-2925
-
Efficient Formal Verification of Galois-Field Arithmetic Circuits Using ZDD Representation of Boolean Polynomials
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems 41 (3) 794-798 2022/03
Publisher:
DOI：
10.1109/tcad.2021.3059924
10.1587/transinf.2020lop0004_references_DOI_CzVdfSwp1EfHTj97uHvEdSeTTcX
10.1109/ismvl51352.2021.00034_references_DOI_CzVdfSwp1EfHTj97uHvEdSeTTcX
ISSN：
0278-0070
eISSN：
1937-4151
-
Curse of Re-encryption: A Generic Power/EM Analysis on Post-Quantum KEMs
Peer-reviewed
Rei Ueno, Keita Xagawa, Yutaro Tanaka, Akira Ito, Junko Takahashi, Naofumi Homma
IACR Transactions on Cryptographic Hardware and Embedded Systems 2022 (1) 296-322 2021/11/19
Publisher:
DOI：
10.46586/tches.v2022.i1.296-322
eISSN：
2569-2925
-
Fault-Injection Attacks Against NIST’s Post-Quantum Cryptography Round 3 KEM Candidates
Peer-reviewed
Keita Xagawa, Akira Ito, Rei Ueno, Junko Takahashi, Naofumi Homma
International Conference on the Theory and Application of Cryptology and Information Security (ASIACRYPT) 33-61 2021
Publisher:
DOI：
10.1007/978-3-030-92075-3_2
ISSN：
0302-9743
eISSN：
1611-3349
-
Machine Learning and Hardware security: Challenges and Opportunities -Invited Talk-
Invited
Peer-reviewed
Francesco Regazzoni, Shivam Bhasin, Amir Ali Pour, Ihab Alshaer, Furkan Aydin, Aydin Aysu, Vincent Beroulle, Giorgio Di Natale, Paul Franzon, David Hely, Naofumi Homma, Akira Ito, Dirmanto Jap, Priyank Kashyap, Ilia Polian, Seetal Potluri, Rei Ueno, Elena Ioana Vatajelu, Ville Yli-Mayry
IEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers, ICCAD 2020-November 2020/11/02
DOI：
10.1145/3400302.3416260
ISSN：
1092-3152
-
A Formal Security Proof of Masking
Rei Ueno, Akiko Inoue, Kazuhiko Minematsu, Akira Ito, Naofumi Homma
2026
DOI：
10.1007/978-3-032-35415-0_11
-
Can Inputs’ Reconstruction Information Be Coded into Machine Learning Model’s Outputs?
Peer-reviewed
Kazuki Iwahana, Osamu Saisho, Takayuki Miura, Akira Ito
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 14399 LNCS 665-682 2024
DOI：
10.1007/978-3-031-54129-2_39
ISSN：
0302-9743
eISSN：
1611-3349
-
Homomorphic encryption for stochastic computing
Peer-reviewed
Ryusuke Koseki, Akira Ito, Rei Ueno, Mehdi Tibouchi, Naofumi Homma
Journal of Cryptographic Engineering 13 (2) 251-263 2022/09/17
Publisher:
DOI：
10.1007/s13389-022-00299-6
ISSN：
2190-8508
eISSN：
2190-8516
-
An Algebraic Approach to Verifying Galois-Field Arithmetic Circuits with Multiple-Valued Characteristics
Peer-reviewed
ITO Akira, UENO Rei, HOMMA Naofumi
IEICE Transactions on Information and Systems E104.D (8) 1083-1091 2021/08/01
Publisher:
The Institute of Electronics, Information and Communication Engineers
DOI：
10.1587/transinf.2020lop0004
ISSN：
0916-8532
eISSN：
1745-1361
-
Extraction of binarized neural network architecture and secret parameters using side-channel information
Peer-reviewed
Ville Yli-Mäyry, Akira Ito, Naofumi Homma, Shivam Bhasin, Dirmanto Jap
Proceedings - IEEE International Symposium on Circuits and Systems 2021-May 2021/05
Publisher:
DOI：
10.1109/iscas51556.2021.9401626
10.1587/essfr.15.2_88_references_DOI_JpuX7qPWUm4ubOtPxRfT08NclDI
ISSN：
0271-4310
-
A Formal Approach to Identifying Hardware Trojans in Cryptographic Hardware
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma
Proceedings of The International Symposium on Multiple-Valued Logic 2021-May 154-159 2021/05
Publisher:
DOI：
10.1109/ismvl51352.2021.00034
ISSN：
0195-623X
-
Imbalanced Data Problems in Deep Learning-Based Side-Channel Attacks: Analysis and Solution
Peer-reviewed
Akira Ito, Kotaro Saito, Rei Ueno, Naofumi Homma
IEEE Transactions on Information Forensics and Security 16 3790-3802 2021
Publisher:
DOI：
10.1109/tifs.2021.3092050
ISSN：
1556-6013
eISSN：
1556-6021
-
Effective Formal Verification for Galois-field Arithmetic Circuits with Multiple-Valued Characteristics
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma
Proceedings of The International Symposium on Multiple-Valued Logic 2020-November 46-51 2020/11
Publisher:
DOI：
10.1109/ismvl49045.2020.00-31
10.1587/transinf.2020lop0004_references_DOI_ApLGTUlgaJtnF14sAkc8CHjbRZE
ISSN：
0195-623X
-
CycleGAN-Based High-Quality Non-Parallel Voice Conversion with Spectrogram and WaveRNN
Peer-reviewed
Aoi Kanagaki, Masaya Tanaka, Takashi Nose, Ryohei Shimizu, Akira Ito, Akinori Ito
2020 IEEE 9th Global Conference on Consumer Electronics, GCCE 2020 356-357 2020/10/13
DOI：
10.1109/GCCE50665.2020.9291952
-
Practical side-channel based model extraction attack on tree-based machine learning algorithm
Peer-reviewed
Dirmanto Jap, Ville Yli-Mäyry, Akira Ito, Rei Ueno, Shivam Bhasin, Naofumi Homma
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 12418 LNCS 93-105 2020
DOI：
10.1007/978-3-030-61638-0_6
ISSN：
0302-9743
eISSN：
1611-3349
-
Characterizing Parallel Multipliers for Detecting Hardware Trojans
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma, Takafumi Aoki
Journal of Applied Logics 5 (9) 1815-1831 2018/12
ISSN：
2631-9810
eISSN：
2631-9829
-
On the detectability of hardware trojans embedded in parallel multipliers
Peer-reviewed
Akira Ito, Rei Ueno, Naofumi Homma, Takafumi Aoki
Proceedings of The International Symposium on Multiple-Valued Logic 2018-May 62-67 2018/05
Publisher:
DOI：
10.1109/ismvl.2018.00019
ISSN：
0195-623X
-
A study on 2D photo-realistic facial animation generation using 3D facial feature points and deep neural networks
Peer-reviewed
Kazuki Sato, Takashi Nose, Akira Ito, Yuya Chiba, Akinori Ito, Takahiro Shinozaki
Smart Innovation, Systems and Technologies 82 113-118 2018
DOI：
10.1007/978-3-319-63859-1_15
ISSN：
2190-3018
eISSN：
2190-3026
https://orcid.org/0000-0002-4602-7570