Research Interests
Web security, Local LLM for Security, WarpDrive, Card game-based cybersecurity educational materials, IoT Data Dirstibution, Zero-Trust Network, Distributed System
Education
B.E. in Engineering, Department of Information and Communications Engineering, Faculty of Informatics, Kogakuin University (2016.04 - 2020.03)
M.E. in Engineering, Master’s Program in Electrical and Electronic Engineering, Graduate School of Engineering, Kogakuin University (2020.04 - 2022.03)
Ph.D. Student, Doctoral Program in Electrical and Electronic Engineering, Graduate School of Engineering, Kogakuin University (2024.10 - Now)
Career
Development Engineer, DOCOMO Technology, Inc. (2022.04 - 2025.03)
Visiting Researcher, Department of Information and Communications Engineering, Faculty of Informatics, Kogakuin University. (2024.05 - 2025.03)
Research Engineer, Cybersecurity Nexus, Cybersecurity Research Institute, National Institute of Information and Communications Technology (NICT). (2025.04 - Now)
Part-time Lecturer, Department of Information Science, School of Information Science, Meisei University. (2026.09 - Now)
Research Achievements
[Journals]
Masaki Yoshii, and Osamu Mizuno, "Metering Data Distribution Method for Next-Generation Smart Meters Using UDAC-TK," IEICE Transactions on Communications, vol. E109-B, no. 10, pp.-, Oct. 2026.
DOI: 10.23919/transcom.2025EBT0012 (Early Access)
Masaki Yoshii, Hayato Kumazaki, and Osamu Mizuno, "UDAC-TK: Implementation and Performance Evaluation of Ticket Authentication and Authorization Nodes in IoT Data Distribution Models," IEICE Transactions on Communications, vol. J108-B, no. 11, pp. 543 - 559, Nov. 2025. DOI:10.14923/transcomj.2024JBP3022 (only in japanese)
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "IoT Data Distribution Method Using the Privacy Protection Oriented Ticket-based Access Control," IPSJ Journal, vol. 60, no. 12, pp. 1726 - 1744, Dec. 2022. DOI: 10.20729/00222723 (only in japanese)
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Performance and Security Evaluation of Table-based Access Control Applied to IoT Data Distribution Method," IEICE Transactions on Communications, vol. E105-B, no. 11, pp. 1390 - 1399, Nov. 2022. DOI: 10.1587/transcom.2021TMP0007
Eishin Nagaoka, Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Evaluatin for cloud-based load distribution model in ICSN," IEICE Communications Express, vol. 11, no. 8, pp. 509 - 514, Aug. 2022. DOI: 10.1587/comex.202TCL0017
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Evaluation of ticket-based access control method applied to IoT data distribution," IEICE Communications Express, vol. 11, no. 3, pp. 148 - 153, Mar. 2022. DOI: 10.1587/comex.2021XBL0214
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Evaluation of table-based access control in IoT data distribution method using fog computing, IEICE Communications Express, vol. 10, no. 10, pp. 822 - 827, Oct. 2021. DOI: 10.1587/comex.2021XBL0134
[International Conferences (with peer-review)]
Ryota Sugano, Shun Fuse, Masaki Yoshii, and Osamu Mizuno, "A Storage-Efficient Dual-Ledger Blockchain Architecture for IT/OT Operational Logs," IEICE International Conference on Emerging Technologies for Communications (ICETC 2026), Taipei, Taiwan, 23 - 25 Nov. 2026. (To be poster presented)
Masaki Yoshii, Shingo Yasuda, and Daiuke Inoue, "A Candidate URL Generation Method for Fake News Sites and an Empirical Investigation," IEICE International Conference on Emerging Technologies for Communications (ICETC 2026), Taipei, Taiwan, 23 - 25 Nov. 2026. (To be poster presented)
Masaki Yoshii, and Osamu Mizuno, "Ticket-Based Authentication and Authorization Node Collaboration Method with Performance Evaluation Using MQTT Broker," 2026 IEEE Region 10 Conference (TENCON), Bali, Indonesia, 10 - 13 Oct. 2026. (To be presented)
Masaki Yoshii, Shintaro Kawamura, Nagisa Nakamura, Hidekazu Tanaka, Shingo Yasuda, and Daisuke Inoue, "Collecting Fake Shopping Website URLs via Product Image Search, IEEE, 2026 40th International Conference on Information Networking (ICOIN), Hanoi, Vietnam, pp. 435 - 438, 14 - 16 Jan. 2026. DOI: 10.1109/ICOIN68469.2026.11480580
Masaki Yoshii, and Osamu Mizuno, "UDAC-TK: Performance Evaluation of Authentication and Authorization Nodes for Next-Generation Smart Meter Data Distribution," IEEE, 2025 25th Asia-Pacific Network Operations and Management Symposium (APNOMS), Kaohsiung, Taiwan, 22 - 24 Sep. 2025. DOI: 10.23919/APNOMS67058.2025.11181336
Eishin Nagaoka, Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Cloud-based Load Distribution Model in Information-Centric Networking Wireless Sensor Networks," IEICE, Proceeding of the IEICE International Conference on Emerging Technologies for Communications (ICETC 2021), Online, C2-1, 1 - 3 Dec. 2021. DOI: 10.34385/proc.68.C2-1
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Performance Evaluation of Table-based Access Control List Applied to IoT Data Distribution Method using Fog Computing," IEICE, Proceeding of the IEICE International Conference on Emerging Technologies for Communications (ICETC 2020), Online, E1-1, 2 - 4 Dec. 2020. DOI: 10.34385/proc.63.E1-1
[International Conferences (without peer-review)]
Masaki Yoshii, Shun Fuse, and Osamu Mizuo, "A Study on Access Control Methods for User Data in IoT Data Distribution," The 24th International Symposium on Advanced Technology (ISAT),5-OA3, Hachioji, Tokyo, pp. 165 - 166, Nov. 2025. [paper]
Eishin Nagaoka, Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Preliminary Experiments for the Realization of ICN based Wireless Sensor Networks," The 20th International Symposium on Advanced Technology (ISAT), ICTL8, Online, pp. 245 - 246, Nov. 2021.
Masaki Yoshi, Ryohei Banno, and Osamu Mizuno, "A Study on Access Control Methods in IoT Data Distribution using Fog Computing," The 20th International Symposium on Advanced Technology (ISAT), ICTL3, Online, p. 234, Nov. 2021.
[MISC (only in japanese)]
Ryota Sugano, Shun Fuse, Masaki Yoshii, and Osamu Mizuno, "Proof-of-Concept Study of a Dual-Blockchain Architecture for Water Treatment Plants," IEICE, The 2026th IEICE Society Conference, Sapporo, Hokkaido, B-7-19, Sep. 2026
Shun Fuse, Masaki Yoshii, and Osamu Mizuno, "A Formulation and Evaluation of Consensus Formation Probability in Hierachical PBFT, " IEICE, The 2026th IEICE Society Conference, Sapporo, Hokkaido, B-7-18, Sep. 2026.
Koki Hashimoto, Masaki Yoshii, and Osamu Mizuno, "Analyzing the Characteristics of Fake Shopping Sites for Fraudulent Site Access Control," IEICE, The 2026th IEICE Society Conference, Sapporo, Hokkaido, BPO-1-09, Sep. 2026.
Masaki Yoshii, Shintaro Kawamura, Nagisa Nakamura, Shingo Yasuda, and Daisuke Inoue, "Local Fake-Shopping Website Detector: Detection of Fake-Shopping Website Using a Local LLM with RAG" IEICE, The 40th Technical Meeting on Network Software, Otaru, Hokkaido, NWS-40-1, June 2026.
Koki Hashimoto, Masaki Yoshii, and Osamu Mizuno, "Applying IDS detection Information to the IoT-ZTN System," IEICE Technical Report, vol. 126, no. 74, ICSS2026-18, Takamatsu, Kagawa, pp. 116 - 122, June 2026.
Masaki Yoshii, "WarpDrive Project: Unraveling the Current Stage of Web-Based Attacks," Interop Tokyo 2026, Makuhari, Chiba, June. 2026. (booth presentation)
Shun Fuse, Masaki Yoshii, and Osamu Mizuno, "Effectiveness Evaluation of Layered Consensus Building Method for Blockchain," IEICE, The 2026th IEICE General Conference, B-7-11, Fukuoka, Fukuoka, Mar. 2026.
Masaki Yoshii, Nagisa Nakamura, Shintaro Kawamura, Hidekazu Tanaka, Shingo Yasuda, and Daisuke Inoue, "Analysis of Fake Shopping Site Company Abouts using Local LLM," The 2026th IEICE General Conference, BPO-1-07, Fukuoka, Fukuoka, Mar. 2026.
Masaki Yoshii, and Osamu Mizuno, "Verification of Meter Reading Data Distribution Using a Pseudo Smart Meter," IEICE Technical Report, vol. 125, no. 385, NS2025-293, Naha, Okinawa, pp. 428 - 431, Mar. 2026.
Kosei Shirao, Masaki Yoshii, and Osamu Mizuno, "Zero Trust Network for Services Using Multiple IoT Devices," IEICE Technical Report, vol. 125, no. 381, Okinawa, Okinawa, pp. 128 - 133, Mar. 2026.
Masaki Yoshii, Shintaro Kawamura, Nagisa Nakamura, Hidekazu Tanaka, Shingo Yasuda, and Osamu Mizuno, "A Malicious URL Detection Method for Fake Shopping Sites Using a Local LLM and RAG," IEICE Technical Report, vol. 125, no. 381, ICSS2025-96, Okinawa, Okinawa, pp. 77 - 82, Mar. 2026.
Masaki Yoshii, and Osamu Mizuno, "An Investigation of IoT Data Distribution Method via Multiple Mediation Entities," IEICE, The 39th Technical Meeting on Network Software, NWS-39-14, Kochi, Kochi, Jun. 2026.
Masaki Yoshii, Shintaro Kawamura, Nagisa Nakamura, Hidekazu Tanaka, Shingo Yasuda, and Daisuke, Inoue, "Collecting Fake Shopping-site URLs via Product-Image Search and Maliciousness Classification of URLs Using Local LLM," IEICE, Cross-Field Research Association of Super-Intelligent (RISING 2025), Naha, Okinawa, Nov. 2025.
Masaki Yoshii, Shintaro Kawamura, Nagisa Nakamura, Hidekazu Tanaka, Shingo Yasuda, and Daisuke Inoue, "Proposal and Empirical Study on Fake Shopping Website URL Collection via Product Image Search," Computer Security Symposium 2025 (CSS 2025), Okayama, Okayama, pp. 2007 - 2014.
Masaki Yoshii, and Osamu Mizuno, "Construction Method of a Simulated Smart Meter for Verification of Meter Data Distribution," IEICE, The 2025th IEICE Society Conference, BPO-1-02, Okayama, Okayama, Sep. 2025.
Masaki Yoshii, and Osamu Mizuno, "Ticket-based Authentication and Authorization Node Collaboration Method Using an MQTT Broker," IEEJ, 2025 Annual Conference on Electronics, Information and Systems, GS9-3, Kanazawa, Ishikawa, pp. 1472 - 1478, Aug. 2025.
Masaki Yoshii, Shintaro Kawamura, Hidekazu Tanaka, Shingo Yasuda, and Daisuke Inoue, "Investigation into the Actual Use of Risky Search Keywords Leading to Malicious Websites Using Tachikoma Security Agent," IEICE, The 37th Technical Meetinf on Network Software, NWS-37-2, Obihiro, Hokkaido, June 2025.
Masaki Yoshii, and Osamu Mizuno, "Consideration of Next Generation Smart Meter Data Distribution Using Ticket-based Access Control," IEICE Technical Report, vol. 125, no. 24, NS2025-38, Sapporo, Hokkaido, pp. 130 - 135, May 2025.
Hayato Kumazaki, Masaki Yoshii, and Osamu Mizuno, "Evaluation of IoT data distribution method applying blockchain technology with embedded devices," IEICE Technical Report, vol. 124, no. 419, NS2024-213, Naha, Okinawa, pp. 107 - 112, Mar. 2025.
Hayato Kumazaki, Masaki Yoshii, and Osamu Mizuno, "Implementation in Embedded Devices of Blockchain Technology Application to IoT Data Distribution Method," IEICE Technical Report, vol. 124, no. 259, NS2024-132, Fukui, Fukui, pp. 51 - 56, Nov. 2024.
Takafumi Taya, Eishin Nagaoka, Masaki Yoshii, and Osamu Mizuno, "Design and Evaluation of Device Authentication Method in Information-Centric Networking based Wireless Sensor Networks," The 2022th IEICE General Conference, B-7-18, Online, Mar. 2022.
Eishin Nagaoka, Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Implementation of Cloud-based Load Distribution Model in Information-Centric Networking based Wireless Sensor Networks," IEICE Technical Report, vol. 121, no. 409, IA2021-62, Sakyo, Kyoto, pp. 19 - 24, Mar. 2022.
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Evaluation of Node Performance and Security in IoT Data Distribution Method Applying Ticket-based Access Control," DBSJ, The 14th Forum on Data Engineering and Information Management (DEIM), K21-4, Online, Feb. 2022.
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Evaluation of Processing Delay of Authentication and Authorization Infrastructure for IoT Data Distribution System Using Ticket-based Access Control," IEICE Technical Report, vol. 121, no. 300, IA2021-39, Hiroshima, Hiroshima, pp. 44 - 49, Dec. 2021.
Eishin Nagaoka, Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Implementation Issues and Considerations for an Information-Centric Networking Wireless Sensor Networks on Cloud-based Load Distribution Model," IEICE, The 26th Technical Meetinf on Network Software, NWS-26-7, Online, Oct. 2021.
Eishin Nagaoka, Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Node Load Evaluation of Cloud Load Balancing Model in Information-Centric Networking based Wireless Sensor Network," The 2021th IEICE Society Conference, B-16-16, Online, Sep. 2021.
Hayuru Murayama, Masaki Yoshii, and Osamu Mizuno, "ID Management Method Applying Publish / Subscribe Type Messaging Model to BEMS," IEICE Tokyosection, The 2021 Student Research Presentation Meeting, ID: 80, Online, Mar. 2021.
Eishin Nagaoka, Ayumu Yamaguchi, Masaki Yoshii, and Osamu Mizuno, "Design and Evaluation of Cloud-based Load Distribution Model in Information-Centric Networking based Wireless Sensor Networks," IEICE Technical Report, vol. 120, no. 381, IA2020-44, Online, pp. 58 - 63, Mar. 2021.
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Evaluation of Processing Delay Time in IoT Data Distribution Method Appling Table-based Access Control List," IEICE Technical Report, vol. 120, no. 381, IA2020-42, Online, pp. 46 - 51, Mar. 2021.
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Applying Ticket-based Access Control List to Examination of IoT Data Distribution Method," IEICE, The 23th Technical Meeting on Network Software, nws-23-03, Online, Oct. 2020.
Masaki Yoshii, Ryohei Banno, and Osamu Mizuno, "Application of Access Control List in IoT Data Distribution Method using Fog Computing," The 2020th IEICE Society Conference, BS-4-2, Online, Sep. 2020.
Masaki Yoshii, Keigo Kimura, Yoshiki Amano, and Osamu Mizuno, "IoT data sharing method applying Publish / Subscribe type protocol to Fog Computing," The 2020th IEICE General Conference, B-7-6, Higashi-Hiroshima, Hiroshima, Mar. 2020. (The conference was canceled due to COVID-19, but the presentation was officially recognized as an academic achievement.)
Masaki Yoshii, Keigo Kimura, Yoshiki Amano,and Osamu Mizuno, "Cloud Service Model by IoT Data-Sharing Using Fog Computing," IEICE, The 20th Technical Meeting on Network Software, Hino, Tokyo, Oct. 2019.
Grants and Funding
G-7 Scholarship Foundation Research and development grants (R08-0007) (Apr. 2026 - Mar. 2027)
"Research on Real-World Demonstration in IoT Data Distribution Platforms and Countermeasure Methods for Inherent Threats"
G-7 Scholarship Foundation Research and development grants (R07-0125) (Apr. 2025 - Mar. 2026)
"A Study on Access Control Method for Secondary Use of IoT Data Using a Ticket-based Authentication and Authorization Infrastructure"
Major Awards
Graduate School Student Outstanding Thesis Award, Kogakuin University (Mar. 2026)
Best Oral Presentation Award, The 24th International Symposium on Advanced Technology (ISAT-24) (Nov. 2025)
Annual Achievement Award, DOCOMO Technology, Inc. (Jan. 2024)
Timely Achievement Award, DOCOMO Technology, Inc. (June 2023)
Kogakuin University Award, Kogakuin University (Oct. 2021)
Student Research Encouragement Award, Technical Committee on Internet Architecture, IEICE (Mar. 2021)
Young Researcher Encouragement Award in Network Software, Technical Committee on Network Software, IEICE (Jan. 2021)
Student Presentation Award, IEICE International Conference on Emerging Technologies for Communications (ICETC 2020) (Dec. 2020)
Courses Taught
Academic Year 2026: Computer Management and Security, Meisei University