He received his MS/PhD degrees in Informatics from the Institute of Information Security in 2007 and 2010. He was admitted to the Institute of Information Security as an assistant professor since 2010 and as an associate professor since 2014. He was also an academic visitor at Royal Holloway, University of London, Information Security Group from April 2014 to March 2015. He has been an associate professor at the Faculty of Engineering and Design, Kagawa University since 2024. His specialties include OS/Network Security, intrusion detection and prevention (access control) technology, detection and countermeasures for illegal and harmful information, and malware analysis technology. He is a member of IPSJ, IEICE, JSSST and IEEE.

Research Projects Funded by JSPS Grants-in-Aid

• April 01, 2024 - March 31, 2028, Grant-in-Aid for Scientific Research (C) / Principal Investigator / "Development of Fine-grained Protection Domain Composition Mechanisms to Support Practical Implementation of Defense-in-depth Strategy"
• April 01, 2020 - March 31, 2023, Acquisition, Technology & Logistics Agency / Co-Investigator / "Research on Autonomous Cyber Inference Systems using Deep Reinforcement Learning"
• April 01, 2019 - March 31, 2022, Grant-in-Aid for Scientific Research (C) / Principal Investigator / "Intelligent Intrusion Detection/Prevention Method Based on Highly Reliable Access Control"
• April 01, 2012 - March 31, 2015, Grant-in-Aid for Scientific Research (B) / Co-Investigator / "Resource Access Control Method for Strengthening OS to Realize Next-Generation Information Security Infrastructure" (Principal Investigator: Hidehiko Tanaka)
• April 01, 2010 - March 31, 2012, Grant-in-Aid for Scientific Research (B) / Co-Investigator / "Common Access Control Architecture that Supports the Sound Development of SOA" (Principal Investigator: Hidehiko Tanaka)
• April 01, 2009 - March 31, 2010, Grant-in-Aid for Scientific Research (B) / Research assistant / "Common Access Control Architecture that Supports the Sound Development of SOA" (Principal Investigator: Hidehiko Tanaka)
• April 01, 2005 - March 31, 2008, Grant-in-Aid for Scientific Research (B) / Research assistant / "OS Security Infrastructure Enhancement Method by Linking Multiple OSs and Incorporating Upper Layer Functions" (Principal Investigator: Hidehiko Tanaka)

Joint Research with External Organizations

• April 01, 2025 - March 31, 2026, Kanagawa Prefectural Police, Chiba Prefectural Police, Trend Micro Inc., Japan Cybercrime Control Center / Principal Investigator / "Research on Collection, Analysis, and Detection Methods for Malicious Sites"
• October 01, 2024 - March 31, 2025, Kanagawa Prefectural Police, Chiba Prefectural Police, Trend Micro Inc., Japan Cybercrime Control Center / Principal Investigator / "Research and Development of Malicious Site Detection System"
• April 01, 2023 - March 31, 2024, Kanagawa Prefectural Police, Chiba Prefectural Police, Japan Cybercrime Control Center / Principal Investigator / "Research on Automatic Detection System for Fake Shopping Sites"
• October 01, 2021 - March 31, 2023, Japan Cybercrime Control Center / Principal Investigator / "Research on Detection Methods for Malicious Shopping Sites"
• April 01, 2021 - March 31, 2022, INES Corporation Research Institute / Principal Investigator / "Research on Abstraction and Automatic Linking Methods of System Activities for Intelligent Intrusion Detection and Prevention"
• August 01, 2019 - March 31, 2022, Kanagawa Prefectural Police, Deloitte Tohmatsu Cyber LLC / Principal Investigator / "Research on Intelligence Extraction Methods from Deep Web using Artificial Intelligence"
• October 01, 2017 - July 31, 2020, INES Corporation Research Institute / Principal Investigator / "Research on Definition Methods of Malicious Activities for Intelligent Intrusion Detection and Prevention"
• October 01, 2017 - July 31, 2019, Deloitte Tohmatsu Risk Services Co., Ltd. / Principal Investigator / "Research on Intelligence Extraction Methods from Deep Web using Artificial Intelligence"

Academic Papers / International Conference Presentations [Refereed]

1. Taishin Saito, M. Hashimoto, Kuniyasu Suzaki, "Benign Activity Extraction for Dependency Reduction in Data Provenance-based Attack Analysis," In Proceedings of the 20th International Workshop on Security (IWSEC 2025), Fukuoka, Japan, 2025. (accepted)
2. K. Yamamoto, M. Oya, M. Hashimoto, Haruhiko Kaiya and T. Okubo, "COTTAGE: Supporting Threat Analysis for Security Novices with Auto-Generated Attack Defense Trees," in 20th International Conference on Software Technologies (ICSOFT 2025), Bilbao, Spain, 2025, pp. 132-142.
3. S. Ippa, T. Okubo and M. Hashimoto, "The Relationship Between Emotional and Other Factors in Information Diffusion," in IEEE Access, vol. 13, pp. 21249-21264, 2025, doi: 10.1109/ACCESS.2025.3535547.
4. K. Sakai, K. Takeshige, S. Matsugaya, M. Shimamura and M. Hashimoto, "Phishing Prevention Focusing on Certificates and Input Forms: PoC as Browser Extensions," 2025 1st International Conference on Consumer Technology (ICCT-Pacific), Matsue, Shimane, Japan, 2025, pp. 1-4, doi: 10.1109/ICCT-Pacific63901.2025.11012853.
5. K. Yonemura, M. Hashimoto et al., "The Effects of Prior Learning and Motivation on Learning Outcomes in Gamified Cybersecurity Education: A Case Study Approach," Computer Software, Vol. 42 (2), pp. 30-44, JSSST, 2025.
6. M. Oya, K. Yamamoto, M. Hashimoto and T. Okubo, "A Novel Framework for Reusable Attack Tree Patterns: Leveraging CAPEC for Semi-Automated Threat Modeling," in 2025 9th International Conference on Cryptography, Security and Privacy (CSP), Okinawa, Japan, 2025. (accepted)
7. Shingo Matsugaya, Makoto Shimamura, Kosuke Takeshige, Keisuke Sakai, Masaki Hashimoto, "Characteristic Analysis and Attack Group Identification of Phishing Sites Targeting Japan," In: Barolli, L. (eds) Advances in Internet, Data and Web Technologies. EIDWT 2025. Lecture Notes on Data Engineering and Communications Technologies, vol 243. Springer, Cham. https://doi.org/10.1007/978-3-031-86149-9_7.
8. Shuhei Ippa, Takao Okubo, Masaki Hashimoto, "An Analysis of Relationship Between Social Bots and Echo Chambers on X in Modern Japan," 2024 Twelfth International Symposium on Computing and Networking (CANDAR), Naha, Japan, 2024, pp. 49-58, doi: 10.1109/CANDAR64496.2024.00014.
9. M. Shimamura, S. Matsugaya, K. Sakai, K. Takeshige and M. Hashimoto, "An Analysis of the Relationship Between Black-Hat SEO Malware Families Leveraging Information from Redirected Fake E-Commerce Scam Sites," 2024 IEEE Conference on Dependable and Secure Computing (DSC), Tokyo, Japan, 2024, pp. 123-130, doi: 10.1109/DSC63325.2024.00025.
10. A. Kanda, M. Hashimoto, T. Okubo, "Can We Create a TLS Lie Detector?," Journal of Information Processing, 2024, Volume 32, Pages 1114-1124, Released on J-STAGE December 15, 2024, Online ISSN 1882-6652, https://doi.org/10.2197/ipsjjip.32.1114, https://www.jstage.jst.go.jp/article/ipsjjip/32/0/32_1114/_article/-char/en.
11. S. Ippa, T. Okubo and M. Hashimoto, "An Analysis of Social Bot Activity on X in Modern Japan," in IEEE Access, vol. 12, pp. 125800-125808, 2024, doi: 10.1109/ACCESS.2024.3454536.
12. S. Ippa, T. Okubo and M. Hashimoto, "The Reality and Feature Analysis of Information Diffusion in Japanese Disinformation Examples," 2024 19th Asia Joint Conference on Information Security (AsiaJCIS), Tainan, Taiwan, 2024, pp. 137-142, doi: 10.1109/AsiaJCIS64263.2024.00030.
13. K. Yonemura, M. Hashimoto et al., "Motivation and Educational Effectiveness in Teaching Expert Development Project by an Educational Community," 2024 IEEE Global Engineering Education Conference (EDUCON), Kos Island, Greece, 2024, pp. 01-08, doi: 10.1109/EDUCON60312.2024.10578741.
14. K. Sakai, K. Takeshige, K. Kato, N. Kurihara, K. Ono and M. Hashimoto, "An Automatic Detection System for Fake Japanese Shopping Sites Using fastText and LightGBM," in IEEE Access, vol. 11, pp. 111389-111401, 2023, doi: 10.1109/ACCESS.2023.3323218.
15. N. Ito, M. Hashimoto and A. Otsuka, "Feature Extraction Methods for Binary Code Similarity Detection Using Neural Machine Translation Models," in IEEE Access, vol. 11, pp. 102796-102805, 2023, doi: 10.1109/ACCESS.2023.3316215.
16. K. Yonemura, M. Hashimoto et al., "Motivation in Teaching Expert Development Project by KOSEN Security Educational Community," 2023 IEEE Global Engineering Education Conference (EDUCON), Kuwait, Kuwait, 2023, pp. 1-9, doi: 10.1109/EDUCON54358.2023.10125167.
17. Y. Masubuchi, M. Hashimoto, A. Otsuka, "SIBYL: A Method for Detecting Similar Binary Functions Using Machine Learning," IEICE Transactions on Information and Systems, Vol. E105-D, No.4, pp.755-765, Apr. 2022.
18. A. Kanda, M. Hashimoto, "Identification of TLS Communications Using Randomness Testing," 2021 IEEE 45th Annual Computer Software and Applications Conference (COMPSAC), 2021, pp. 1099-1106, doi: 10.1109/COMPSAC51774.2021.00150.
19. Yamauchi T, Akao Y, Yoshitani R, Nakamura Y, Hashimoto M. Additional kernel observer: privilege escalation attack prevention mechanism focusing on system call privilege changes. International Journal of Information Security. 2020. https://doi.org/10.1007/s10207-020-00514-7
20. M. Kadoguchi, H. Kobayashi, S. Hayashi, A. Otsuka and M. Hashimoto, "Deep Self-Supervised Clustering of the Dark Web for Cyber Threat Intelligence," 2020 IEEE International Conference on Intelligence and Security Informatics (ISI), Arlington, VA, USA, 2020, pp. 1-6, doi: 10.1109/ISI49825.2020.9280485.
21. H. Kobayashi, M. Kadoguchi, S. Hayashi, A. Otsuka and M. Hashimoto, "An Expert System for Classifying Harmful Content on the Dark Web," 2020 IEEE International Conference on Intelligence and Security Informatics (ISI), Arlington, VA, USA, 2020, pp. 1-6, doi: 10.1109/ISI49825.2020.9280536.
22. M. Kadoguchi, S. Hayashi, M. Hashimoto and A. Otsuka, "Exploring the Dark Web for Cyber Threat Intelligence using Machine Leaning," 2019 IEEE International Conference on Intelligence and Security Informatics (ISI), Shenzhen, China, 2019, pp. 200-202, doi: 10.1109/ISI.2019.8823360.
23. T. Yamauchi, Y. Akao, R. Yoshitani, Y. Nakamura and M. Hashimoto, "Additional Kernel Observer to Prevent Privilege Escalation Attacks by Focusing on System Call Privilege Changes," 2018 IEEE Conference on Dependable and Secure Computing (DSC), 2018, pp. 1-8, doi: 10.1109/DESEC.2018.8625137.
24. Masaki Hashimoto : Access Control Technology and Its Latest Trends, Journal of Japan Society for Security Management, Vol.29, No.3, pp.21-27, 2016.
25. Ruo Ando, Masaki Hashimoto , Toshihiro Yamauchi: Secure File Access Log External Storage Mechanism by Virtualization Technology, IPSJ Journal, Vol.54, No.2, pp.585-595, Feb. 2013.
26. Toshiharu Harada, Tetsuo Handa, Masaki Hashimoto, Hidehiko Tanaka: Mandatory Access Control Method Based on Application Execution Status, IPSJ Journal, Vol.53, No.9, pp.2130-2147, Sep. 2012.
27. Masaki Hashimoto, Ruo Ando, ​​Toshiyuki Maeda, Hidehiko Tanaka: Trends in OS research for improving information security, IPSJ Journal: Computing Systems (ACS), Vol.5, No.2, pp.51-62 , Mar. 2012.
28. Masaki Hashimoto, Mira Kim, Hidenori Tsuji, Hidehiko Tanaka: IPSJ Transactions on Authorization Policy Based on Logic Programming, Vol.51, No.9, pp.1682-1691, Sep. 2010.
29. M. Hashimoto, M. Kim, H. Tsuji and H. Tanaka, "Policy Description Language for Dynamic Access Control Models," 2009 Eighth IEEE International Conference on Dependable, Autonomic and Secure Computing, 2009, pp. 37-42, doi: 10.1109/DASC.2009.129.
30. Masaki Hashimoto, Mira Kim, Hidenori Tsuji, Hidehiko Tanaka: Research on Multiple Policy Integrated Management Method for Distributed Systems, Proceedings of Computer Systems Symposium, IPSJ Symposium Series, vol.2008, no.12, IPSJ, pp.49-56, 2008.
31. Kazuki Fujisawa, Masaki Hashimoto, Kunio Miyamoto, Mira Kim, Hidenori Tsuji, Hidehiko Tanaka: Security enhancement of device drivers for virtual machine monitor, Proceedings of Computer Systems Symposium, IPSJ Symposium Series, vol.2007, no.14, Information Processing Society of Japan Society of Japan, pp.31-38, 2007.
32. Masaki Hashimoto, Mira Kim, Hidenori Tsuji, Hidehiko Tanaka: Initial Study of Access Control Model for Distributed Processing Based on Policy, Proceedings of Computer Systems Symposium, IPSJ Symposium Series, vol.2007, no.14, Information Processing Society of Japan Society of Japan, pp.217-224, 2007.

Workshop Presentations [Non-Refereed]

Please see the "List of External Presentations" page.

Courses at Kagawa University

• Practical Technologies for Information Security
• Information Systems & Security Seminar
• Information Systems & Security Experiment I
• Information Security II
• Information Security Exercise
• Introduction to Information Engineering
• University Introduction Seminar
• Teamworking Exercise

Courses at Other Universities and Graduate Schools

• Learning Computers (Wako University)
• Science of Decision Making (Wako University)
• Computer A (Wako University)
• Information Design Theory A / B (Wako University)

Prior to FY2023

• Information Security Special Research (Institute of Information Security)
• Research Guidance / Project Research Guidance (Institute of Information Security)
• Information Security Technology Exercise (Institute of Information Security)
• Introduction and Practical Exercise of Capture The Flag (CTF) (Institute of Information Security)
• Operating Systems (Institute of Information Security)
• Special Lecture (Hacking and Malware Analysis) (Institute of Information Security)
• Information Security Reading Seminar I (Institute of Information Security)
• Algorithm Fundamentals (Institute of Information Security)
• Medical Information Science (Kanagawa Prefectural College of Nursing and Medical Care)

Other Activities

• 2020 Niigata Municipal Koshi Secondary School Tokyo Area Training - Training Lecturer
• 2016 Suzugamine Women's Junior College FD Training - Training Lecturer
• 2015-2019 BHN Telecom Support Council APT (Asia-Pacific Telecommunity) J4 Program - Training Lecturer
• 2015-2017 NPO WEBREIGO Science Cafe "Introduction to Information Security for Junior and Senior High School Students/Introduction to CTF for Junior and Senior High School Students" - Training Lecturer

Positions and Roles in Academic Organizations

Current

1. April 2025 - Present, IPSJ Computer Security Group (CSEC), Expert Committee
2. July 2024 - Present, Special Section on ICSS, IEICE Transactions on Information and Systems, Editorial Committee
3. June 2024 - Present, 24th International Conference on Cryptology And Network Security (CANS 2025), Steering Committee Member
4. April 2024 - Present, IPSJ Journal "COMPSAC" Special Issue, Editorial Committee
5. April 2020 - Present, JSSST SIG-rePiT, Steering Committee
6. January 2020 - Present, JSSST Journal Special Section on Practical IT Education, Editor-in-Chief
7. April 2018 - Present, OSS Security Technology Workshop (OWS), Steering Committee
8. January 2018 - Present, NETSAP: The IEEE International Workshop on Network Technologies for Security, Administration and Protection, Workshop Organizer
9. April 2010 - Present, IEICE ICSS, Expert Committee

Past

1. July 2024 - March 2025, Computer Security Symposium 2024 (CSS2024), Program Committee
2. June 2024 - March 2025, The 2024 7th IEEE Conference on Dependable and Secure Computing (IEEE DSC 2024), Program Committee Member
3. January 2023 - December 2023, IWSEC 2023: The 18th International Workshop on Security, Local Organizing Committee Member
4. April 2021 - March 2025, IEICE Transactions on Information and Systems, Editorial Committee
5. April 2021 - March 2025, IPSJ Computer Security Group (CSEC), Steering Committee
6. April 2016 - March 2021, IPSJ Computer Security Group (CSEC), Expert Committee
7. April 2019 - March 2020, JSSST 6th Practical IT Education Symposium rePiT2020, Co-Chair
8. April 2019 - March 2020, JSSST SIG-rePiT, Chief
9. April 2019 - March 2020, IPSJ Computer Security Symposium 2019 (CSS2019), Steering Committee
10. April 2018 - March 2019, IPSJ Malware Research Workshop 2018 (MWS2018), Program Committee
11. April 2018 - March 2019, IPSJ Computer Security Symposium 2018 (CSS2018), Program Committee, OWS2018 Special Session Chair
12. January 2018 - December 2018, CSITS 2018: International Workshop on Cyber Security for Intelligent Transportation Systems, Program Committee
13. January 2018 - December 2018, ECC 2018: The 22nd Workshop on Elliptic Curve Cryptography, Administration and Protection, Local Organizing Committee
14. August 2016 - December 2017, CPSS 2017: The 3rd ACM Cyber-Physical System Security Workshop, Program Committee
15. July 2016 - December 2017, ACNS 2017: The 15th International Conference on Applied Cryptography and Network Security, Organizing Committee
16. June 2016 - May 2020, IPSJ Journal / JIP Editorial Committee
17. April 2016 - March 2017, IPSJ Computer Security Symposium 2016 (CSS2016), Steering Committee
18. April 2015 - March 2016, Computer Security Symposium 2015 (CSS2015), Program Committee
19. January 2015 - December 2017, NETSAP: The IEEE International Workshop on Network Technologies for Security, Administration and Protection, Program Committee
20. January 2015 - December 2015, Special Section on ICSS, IEICE Transactions on Information and Systems, Editorial Committee
21. April 2013 - March 2016, IPSJ Computer Security Group (CSEC), Steering Committee
22. April 2012 - March 2013, IPSJ Computer Security Symposium 2012 (CSS2012), Steering Committee

Committee Members for Government and Local Government Councils

1. April 2024 - Present, National Institute of Technology, Cyber Security Education Promotion Center, Adviser
2. April 2024 - Present, Ministry of Economy, Trade and Industry, Certification System for Advanced Maintenance Enforcement Provider, Review Board Member
3. October 2022 - Present, Japan Network Security Association, Industry-Academia Collaboration Council for Cyber Security, Director
4. October 2022 - March 2024, National Institute of Technology, KOSEN Security Educational Community, Adviser
5. October 2021 - March 2022, Ministry of Economy, Trade and Industry, Industrial Structure Council, Consumer Product Safety Subcommittee, Electric Safety Subcommittee, Study Committee on Cyber Security and Human Resource Development in Private Electric Facilities, Committee Chair
6. January 2021 - Present, Ministry of Economy, Trade and Industry, Industrial Structure Council, Consumer Product Safety Subcommittee, Electric Safety Subcommittee, Electric Safety System WG, Expert Member

Other Activities

1. 2025-Present, CTF Kanagawa organized by Kanagawa Prefectural Police, Problem Creation Committee, Vice Chair
2. 2017-2024, CTF Kanagawa organized by Kanagawa Prefectural Police, Problem Creation Committee, Chair
3. 2021-2024, INES Corporation Research Institute, Technical Advisor
4. 2024, Invited Lecture "Recent Trends and Issues in Disinformation" Kagawa Prefecture Provider etc. Crime Prevention Liaison Council 2024 General Assembly
5. 2023, Invited Lecture "Continued: Position and Current Status of Industry-Academia-Government Collaboration in Information Security" Japan Cybercrime Control Center 24th JC3 Workshop
6. 2023, Invited Lecture "Position and Current Status of Industry-Academia-Government Collaboration in Information Security" Japan Cybercrime Control Center JC3 Forum 2023
7. 2022, Invited Lecture "Current Status and Future Development of Cybersecurity" National Institute of Technology and Evaluation Information Security Seminar
8. 2017, Article "Monthly BAN No. 35 IT Security Introduction: Ethical Hacking - Methods of Privilege Escalation"
9. 2016, Article "Monthly BAN No. 24 IT Security Introduction: Ethical Hacking - Reconnaissance and Information Gathering Methods"
10. 2016, Yokohama City Representative Member, Israeli Government Invitation Program "Young Leadership Program"
11. 2014, Article "Monthly BAN No. 9 IT Security Introduction: Ethical Hacking - Security Evaluation and Improvement Methods by Simulated Attacks"
12. 2013, Operational Cooperation, SECCONCTF 2013
13. 2012, Operational Cooperation, SECCONCTF 2012

• Hidehiko Tanaka Laboratory