2025
Sep. 24, 2025: Reimei Electronic Devices Symposium @ Okayama, Japan
We hosted the joint symposium "Reimei Electronic Devices Symposium" at Okayama University together with Kyoto University and Kyushu Institute of Technology. M1 Soma Tanimoto and M1 Rei Mitsuyasu gave oral presentations, and D3 Masaki Himuro, M2 Daisuke Hamamoto, B4 Yuma Kawai, B4 Kosei Nakamura, and B4 Shuto Murakami presented posters.
Sep. 19, 2025: enPiT Program @ Kitakyushu, Japan
Assoc. Prof. Kengo Iokibe visited the University of Kitakyushu as part of the information security education program enPiT and conducted a hands‑on exercise on side‑channel attacks. M1 Soma Tanimoto and M1 Rei Mitsuyasu served as Teaching Assistants.
Sep. 8, 2025: EMCJ Touchpoint @ Okayama, Japan (M1 Tanimoto, M1 Mitsuyasu, B4 Nakamura)
M1 Soma Tanimoto, M1 Rei Mitsuyasu, and B4 Kosei Nakamura presented our lab's research outcomes at EMCJ Touchpoint held at Okayama University (Okayama, Japan).
Sep. 5, 2025: EMC Europe 2025 in Paris, France (Iokibe, M2 Hamamoto)
Assoc. Prof. Kengo Iokibe and M2 Daisuke Hamamoto presented our research at EMC Europe 2025 hosted by Sorbonne University (Paris, France).
- Kengo Iokibe, Soma Tanimoto, Hayato Chikamori, Masaki Hoimuro and Yoshitaka Toyota, "Modeling of Cryptographic Module with SoC FPGA for Side-Channel Leakage Simulation," 2025 International Symposium on Electromagnetic Compatibility (EMC Europe), Paris, France, Sep. 1–5, 2025.
- Daisuke Hamamoto, Masaki Hoimuro, Kengo Iokibe, Yoshitaka Toyota and Noriaki Kawanishi, "Impact of Triggering‑Probe Connection on Evaluating Side‑Channel Information Leakage from Cables," 2025 International Symposium on Electromagnetic Compatibility (EMC Europe), Paris, France, Sep. 1–5, 2025.
Aug. 22, 2025: IEEE EMC+SIPI 2025 in North Carolina, USA (D3 Himuro)
D3 Masaki Himuro presented our work at IEEE EMC+SIPI 2025, held at the Raleigh Convention Center (North Carolina, USA).
- Masaki Himuro, Rei Mitsuyasu, Kengo Iokibe and Yoshitaka Toyota, "Simulation‑Based Approach to Target EMI Attenuation for Meeting Required Power Side‑Channel Attack Success Rate," 2025 IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity (EMC+SIPI), Raleigh, North Carolina, USA, Aug. 18–22, 2025.
Jul. 29, 2025: Summer Kick‑off Party
We held a summer kick‑off party at "Nippachi Daigoro" to celebrate the end of the spring semester and strengthen our lab camaraderie.
Jul. 17, 2025: IEICE EMCJ Technical Meeting @ Minato, Tokyo (M2 Hamamoto)
M2 Daisuke Hamamoto presented at the IEICE EMCJ Technical Meeting held at the Japan Machine Promotion Association Building (Minato, Tokyo).
- Daisuke Hamamoto, Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, Noriaki Kawanishi, "Study on Common‑Mode Side‑Channel Leakage Evaluation Considering the Effect of a Trigger Probe," IEICE EMCJ, EMCJ2025‑31, pp. 37–42, Minato, Tokyo, Jul. 17, 2025. (in Japanese)
Jul. 7, 2025: IEICE HWS Technical Meeting @ Sapporo, Hokkaido (M1 Tanimoto)
M1 Soma Tanimoto presented at the IEICE Hardware Security (HWS) Technical Meeting held at Sapporo Convention Center (Sapporo, Hokkaido).
- Soma Tanimoto, Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, "Study of EM Side‑Channel Attack Prediction Model for Application to SoC‑FPGA PCB Design," IEICE HWS, HWS2025‑19, pp. 86–91, Sapporo, Hokkaido, Jul. 7–9, 2025. (in Japanese)
Jun. 24, 2025: JIEP High‑Frequency Electronics Packaging Technical Committee @ Suginami, Tokyo (M1 Mitsuyasu)
M1 Rei Mitsuyasu presented at the High‑Frequency Electronics Packaging Technical Committee held at the Circuit Design Center (Suginami, Tokyo).
- Rei Mitsuyasu, Masaki Himuro, Kengo Iokibe, "Countermeasure Design Against Side‑Channel Attacks Using Equivalent Noise Source Model of IC Power Network," JIEP High‑Frequency Electronics Packaging Technical Committee, 1, pp. 1–7, Suginami, Tokyo, Jun. 24, 2025. (in Japanese)
May 21, 2025: Award Announcement (D3 Himuro)
Alumnus Tatsuya Sakagami, D3 Masaki Himuro, Assoc. Prof. Kengo Iokibe, and Prof. Yoshitaka Toyota received the Song‑Tsuen Pong Best Student Paper Award at APEMC 2025 for their international conference paper.
May 21, 2025: APEMC 2025 in Taipei, Taiwan (D3 Himuro)
D3 Masaki Himuro presented our work at the international conference APEMC 2025 held at the Taipei International Convention Center (Taipei, Taiwan). He also joined the Best Student Paper Finalist Competition and presented a poster on a separate day.
- Tatsuya Sakagami, Masaki Himuro, Kengo Iokibe and Yoshitaka Toyota, "Multiple Regression Modeling of EMI from Cryptographic Hardware for Estimating Resistance to Deep Learning Side‑Channel Attack," 2025 Asia‑Pacific International Symposium and Exhibition on Electromagnetic Compatibility (APEMC), pp. 132–135, Taipei, Taiwan, May 19–21, 2025. DOI
Apr. 9, 2025: Welcome Party for New Members
We held a welcome party for new members at "Tsukumo Okayama Ekimae". Faculty, graduate students, and B4 students introduced themselves and mingled. (The photo shows the after‑party.)
2024
Mar. 27, 2025: Award Announcement (D2 Himuro)
D2 Masaki Himuro received a Student Award from the IEEE EMC Society Japan Joint / Sendai Chapters.
Mar. 14, 2025: IEICE EMCJ Technical Meeting @ Goto, Nagasaki (D2 Himuro)
D2 Masaki Himuro presented the results of a joint research project with Sanden Corporation at the IEICE EMCJ Technical Meeting held at the Fukue Comprehensive Welfare & Public Health Center (Goto, Nagasaki).
- Masaki Himuro, Takuya Nagata, Tatsuki Kashiwabara, Koji Kobayashi, Kengo Iokibe, Yoshitaka Toyota, "Consideration Based on Circuit‑EM Field Co‑simulation of the Effect of Insulation Transformer in High‑Voltage Automotive ECU on Conducted EMI," IEICE EMCJ, EMCJ2024‑111, pp. 42–45, Goto, Nagasaki, Mar. 14, 2025. (in Japanese)
Mar. 7, 2025: Award Announcement (B4 Mitsuyasu)
B4 Rei Mitsuyasu received the Encouragement Award at the 2024 IEICE Chugoku Section Joint Conference.
Jan. 31, 2025: SCIS 2025 @ Kitakyushu, Fukuoka (M2 Sakagami, M1 Hamamoto)
M2 Tatsuya Sakagami and M1 Daisuke Hamamoto presented at the Symposium on Cryptography and Information Security (SCIS 2025) held at RIHGA Royal Hotel Kokura (Kitakyushu, Fukuoka).
- Tatsuya Sakagami, Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, "Multiple Regression Modeling for Low‑cost Prediction of Deep‑Learning Side‑Channel Attack," SCIS 2025, 2E2‑1, Kitakyushu, Fukuoka, Jan. 28–31, 2025. (in Japanese)
- Daisuke Hamamoto, Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, Noriaki Kawanishi, "Effect of Trigger‑Probe Connection in Measuring Side‑Channel Information Leakage on Cables," SCIS 2025, 2E2‑2, Kitakyushu, Fukuoka, Jan. 28–31, 2025. (in Japanese)
Jan. 17, 2025: 3rd Joint Workshop on EM Security in Seoul, Korea (Iokibe, M1 Hamamoto, D2 Himuro)
Prof. Kengo Iokibe, D2 Masaki Himuro, and M1 Daisuke Hamamoto presented at the 3rd Joint Workshop on EM Security hosted by Yonsei University (Seoul, Korea).
Dec. 16, 2024: Hardware Security Forum @ Kobe, Hyogo (M1 Hamamoto)
M1 Daisuke Hamamoto presented a poster at the Hardware Security Forum hosted by Kobe Gakuin University.
Dec. 6, 2024: Award Announcement (B4 Mitsuyasu)
B4 Rei Mitsuyasu and Daichi Tsuruta (Toyota Lab) received the Encouragement Award at the 5th EMC Design Countermeasure Contest.
Dec. 6, 2024: 5th EMC Design Countermeasure Contest @ Nogata (Fukuoka) & Minato (Tokyo) (B4 Mitsuyasu)
B4 Rei Mitsuyasu and Daichi Tsuruta (Toyota Lab) participated in the 5th EMC Design Countermeasure Contest. As part of the contest, they visited ADOX Fukuoka (Nogata, Fukuoka) and conducted EMC tests (CISPR 25) on their jointly developed application. They also presented the application and its EMC countermeasures at the presentation session held later at the Machine Promotion Hall (Minato, Tokyo).
Nov. 17, 2024: HISS 26th @ Higashi‑Hiroshima, Hiroshima (B4 Tanimoto)
B4 Soma Tanimoto presented at the IEEE Hiroshima Section Student Symposium (HISS 26th) held at Hiroshima University.
- Soma Tanimoto, Hayato Chikamori, Masaki Himuro, Daisuke Hamamoto, Kengo Iokibe, Yoshitaka Toyota, "Study Toward Simulation of Cryptographic Information Leakage Superimposed on Near‑field Magnetic Emission from Printed Circuit Boards," HISS 26th, TP‑B‑7, Hiroshima, Nov. 16–17, 2024. (in Japanese)
Nov. 16, 2024: enPiT Program @ Okayama University
Assoc. Prof. Kengo Iokibe delivered a lecture as part of the information security education program enPiT and held a hands‑on exercise on side‑channel attacks. M2 Tatsuya Sakagami, M1 Daisuke Hamamoto, B4 Rei Mitsuyasu, and B4 Yukino Yoshida supported the session as Teaching Assistants.
Nov. 15, 2024: EMC Joint Workshop 2024 in Bangkok, Thailand (D2 Himuro)
D2 Masaki Himuro presented at the EMC Joint Workshop 2024, Bangkok hosted at Kumwell Academy (Bangkok, Thailand), and enjoyed networking at the social event.
- Masaki Himuro, Rei Mitsuyasu, Kengo Iokibe and Yoshitaka Toyota, "SNR Identification Using Fewer Plaintexts Selected to Save Evaluation Time of Side‑Channel Attack Success Rate," IEICE EMCJ, EMCJ2024‑72, pp. 8–9, Bangkok, Thailand, Nov. 15, 2024.
Nov. 1, 2024: IEICE HWS Technical Meeting @ Hirosaki, Aomori (B4 Mitsuyasu)
B4 Rei Mitsuyasu presented at the IEICE Hardware Security (HWS) Technical Meeting held at Hirosaki University (Hirosaki, Aomori).
- Rei Mitsuyasu, Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, "Computation of Target Transfer Function for Side‑Channel Leakage Paths Based on Power‑Supply Noise Simulation," IEICE HWS, HWS2024‑62, pp. 1–6, Hirosaki, Aomori, Nov. 1, 2024. (in Japanese)
Oct. 26, 2024: Chugoku‑Section Joint Convention of Institutes of Electrical and Information Engineers @ Online (B4 Mitsuyasu)
B4 Rei Mitsuyasu presented at the Chugoku‑Section Joint Convention of Institutes of Electrical and Information Engineers (online).
- Rei Mitsuyasu, Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, "Basic Study on Cryptographic Hardware Design to Satisfy Side‑Channel Attack Resistance Requirements," 2024 Joint Convention, R24‑18‑04, Online, Oct. 26, 2024. (in Japanese)
Sep. 27, 2024: enPiT Program @ Kitakyushu, Japan
Assoc. Prof. Kengo Iokibe visited the University of Kitakyushu as part of enPiT and conducted a side‑channel attack exercise. M2 Tatsuya Sakagami and M1 Daisuke Hamamoto served as Teaching Assistants.
Sep. 24, 2024: Reimei Electronic Devices Symposium @ Kyoto University (M1 Hamamoto)
The joint seminar among Okayama University, Kyoto University, and Kyutech (Reimei Electronic Devices Symposium) was held at Kyoto University, where M1 Daisuke Hamamoto presented our results.
Sep. 6, 2024: EMC Europe 2024 in Bruges, Belgium (D2 Himuro)
D2 Masaki Himuro presented at the international conference EMC Europe 2024 held at the Bruges Meeting & Convention Center (Bruges, Belgium).
- Masaki Himuro, Kengo Iokibe, and Yoshitaka Toyota, "Derivation of Target Transfer Function Against Frequency‑Domain Side‑Channel Analysis Using Simulated IC Switching Current," 2024 International Symposium on Electromagnetic Compatibility (EMC Europe), pp. 51–56, Bruges, Belgium, Sep. 2–5, 2024.
Jun. 28, 2024: IEICE EMCJ Technical Meeting @ Hakodate, Hokkaido (D2 Himuro)
D2 Masaki Himuro presented at the IEICE EMCJ Technical Meeting held at Hotel Sun City Hakodate (Hakodate, Hokkaido).
- Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, "Computation of Target Attenuation of Transfer Function to Suppress Side‑Channel Information Leakage of a Cryptographic IC – A Study Based on Simulated Switching Current Source –," IEICE EMCJ, EMCJ2024‑19, pp. 65–70, Otaru, Hokkaido, Jun. 28, 2024. (in Japanese)
May 24, 2024: EMCJ Touchpoint @ Ginowan, Okinawa (D2 Himuro, M2 Sakagami, M1 Hamamoto)
D2 Masaki Himuro, M2 Tatsuya Sakagami, and M1 Daisuke Hamamoto presented our research at EMCJ Touchpoint held at the Okinawa Convention Center (Ginowan, Okinawa).
May 24, 2024: EMC Japan/APEMC Okinawa @ Ginowan, Okinawa (D2 Himuro, M2 Sakagami)
Assoc. Prof. Kengo Iokibe, D2 Masaki Himuro, and M2 Tatsuya Sakagami presented at the international conference EMC Japan/APEMC Okinawa held at the Okinawa Convention Center (Ginowan, Okinawa). D2 Himuro’s presentation reported joint research with the Nogami Laboratory and Honda Motor Co., Ltd.
- Kengo Iokibe, Masaki Himuro, and Yoshitaka Toyota, "Challenges in Feasible Simulation of Side‑Channel Attack Resistance for Cryptographic Hardware," 2024 EMC Japan/Asia‑Pacific International Symposium on Electromagnetic Compatibility (EMC Japan/APEMC Okinawa), pp. 49–52, Okinawa, Japan, May 20–24, 2024. DOI
- Tatsuya Sakagami, Masaki Himuro, Kengo Iokibe, and Yoshitaka Toyota, "Measured Traces Reduction Using SNR of Leakage for Tolerance Evaluation to Deep Learning‑based Side‑channel Attack," 2024 EMC Japan/APEMC Okinawa, pp. 58–61, Okinawa, Japan, May 20–24, 2024. DOI
- Masaki Himuro, Naota Kawahara, Yoshiyuki Amanuma, Kengo Iokibe, Yasuyuki Nogami, and Yoshitaka Toyota, "Tolerance Evaluation Against Deep Learning Side‑channel Attack on AES in Automotive Microcontroller with Uncertain Leakage Model," 2024 EMC Japan/APEMC Okinawa, pp. 528–531, Okinawa, Japan, May 20–24, 2024. DOI
Apr. 26, 2024: IEICE EMCJ Technical Meeting @ Okayama (M1 Hamamoto)
M1 Daisuke Hamamoto presented at the IEICE EMCJ Technical Meeting held at Okayama University.
- Daisuke Hamamoto, Masaki Himuro, Kengo Iokibe, Yoshitaka Toyota, "Measurement of Side‑Channel Information Superimposed on Common‑Mode Current from a General‑Purpose Embedded Board at Higher Clock Harmonics," IEICE EMCJ, EMCJ2024‑2, pp. 7–11, Okayama, Apr. 26, 2024. (in Japanese)
