インターネットサービスの根幹であるDNSのセキュリティやプライバシーの研究をしています。
暗号化DNSを用いた不正通信の機械学習による検出
R. Mitsuhashi, Y. Jin, K. Iida, and Y. Takai, “DGA-based Malware Communication Detection from DoH Traffic using Hierarchical Machine Learning Analysis,” IEICE Trans. Inf. Systems, vol. E108-D, no. 6, pp. 526-534, June 2025. link
R. Mitsuhashi, Y. Jin, K. Iida, T. Shinagawa, and Y. Takai, “Malicious DNS Tunnel Tool Recognition using Persistent DoH Traffic Analysis,” IEEE Trans. Network & Service Management, vol. 20, no. 2, pp. 2086-2095, Jun. 2023. link
R. Mitsuhashi, Y. Jin, K. Iida, T. Shinagawa, and Y. Takai, “Detection of DGA-based Malware Communications from DoH Traffic Using Machine Learning Analysis,” Proc. IEEE Consumer Commun. & Networking Conf. (CCNC2023), pp. 224-229, Jan. 2023. link
R. Mitsuhashi, A. Satoh, Y. Jin, K. Iida, T. Shinagawa, and Y. Takai, “Identifying Malicious DNS Tunnel Tools from DoH Traffic Using Hierarchical Machine Learning Classification,” Proc. Information Security Conference 2022 (ISC2022), part of Lecture Notes in Computer Science, vol. 13118, pp. 238-256, Nov. 2021. link
不正DNS通信の検出と遮断
H. Ichise, Y. Jin, M. Ikebe, and K. Iida, "Mitigation Method for Random Subdomain Attacks to Authoritative DNS Servers by Traffic Control," Proc. IEEE Int'l Conf. ICT Convergence (ICTC2025), pp. 1620-1624, Oct. 2025. link
H. Ichise, Y. Jin, and K. Iida, "RPZ-Based Suspicious Direct Outbound DNS Traffic Detection Mechanism With Adaptive Policy Updates," IEEE Access, vol. 13, pp. 30694-30704, Feb. 2025. link
金 勇, 一瀬 光, 砂原 悟, 飯田 勝吉, 山井 成良, "[招待講演] DNSを活用した研究で着目した幾つかのリソースレコードの紹介," 信学技報, vol. 124, no. 333, ICM2024-32, pp. 80-83, 2025年1月. link
H. Ichise, Y. Jin, S. Sunahara, T. Kondo, and K. Iida, "A Look Over on The Usages of Relatively Rare Types of DNS Resource Records," Proc. IEICE Int'l Conf. Emerging Technologies for Communications (ICETC2023), 1 page, Nov. 2023. link
H. Ichise, Y. Jin, and K. Iida, "Policy-based Detection and Blocking System Against Abnormal Applications by Analyzing DNS Traffic," Proc. IEEE Int'l Symposium on Communications and Information Technologies (ISCIT2023), pp. 312-317, Oct. 2023. link
H. Ichise, Y. Jin, and K. Iida, "Policy-based Detection and Blocking System for Abnormal Direct Outbound DNS Queries using RPZ," Proc. Int'l Conf. Future Computer and Communication (ICFCC 2022), pp. 327-332, Feb. 2022. link
飯田勝吉, 一瀬 光, 金 勇, "［招待講演］DNS通信分析によるボットネット通信の検知・遮断技術の研究最前線," 信学技報, vol. 120, no. 162, NS2020-41, pp. 3-6, 2020年9月. link
Y. Iuchi, Y. Jin, H. Ichise, K. Iida, and Y. Takai, "Detection and Blocking of DGA-based Bot Infected Computers by Monitoring NXDOMAIN Responses," Proc. IEEE Int'l Conf. Cyber Security and Cloud Computing (CSCloud 2020), pp. 82-87, Aug. 2020. link
H. Ichise, Y. Jin, K. Iida, and Y. Takai, "NS record History Based Abnormal DNS Traffic Detection Considering Adaptive Botnet Communication Blocking," Journal of Information Processing, vol. 28, pp. 112-122, Feb. 2020. link
H. Ichise, Y. Jin, K. Iida, and Y. Takai, "Detection and Blocking of Anomaly DNS Traffic by Analyzing Achieved NS Record History," Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2018), pp. 1586-1590, Nov. 2018. link
H. Ichise, Y. Jin, and K. Iida, "Analysis of DNS TXT Record Usage and Consideration of Botnet Communication Detection," IEICE Trans. Communications, vol. E101-B, no. 1, pp. 70-79, Jan. 2018. link
H. Ichise, Y. Jin, and K. Iida, "Analysis of Via-resolver DNS TXT Queries and Detection Possibility of Botnet Communications," IEICE Communications Express, vol. 5, no. 3, pp. 74-78, Mar. 2016. link
機関プライバシーを実現するDNSアーキテクチャ
S. Sunahara, Y. Jin, K. Iida, N. Yamai, and Y. Takai, "A Privacy-Preserving Full DNS over HTTPS Architecture via Compatible NS Record Based Information Sharing," IEICE Trans. Communications, vol. E109-B, no. 2, pp. 291-304, Feb. 2026. link
S. Sunahara, N. Kuroda, S. Hagihara, Y. Jin, K. Iida, and N. Yamai, "Towards Privacy Enhanced NS Record-Based Key Distribution for Encrypted SNI," Proc. IEEE Asia-Pacific Conference on Communications (APCC2025), pp. 1-2, Nov. 2025. link
S. Sunahara, Y. Jin, K. Iida, and Y. Takai, "A Framework for Institutional Privacy Considered Domain Name Resolution: Full-DoH DNS Architecture," IEEE Access, vol. 13, pp. 36951-36964, Feb. 2025. link
S. Sunahara, Y. Jin, K. Iida, N. Yamai, and Y. Takai, "Privacy Preserved Achievement Method for OCSP Status and Supported Protocols in Full-DoH Architecture," Proc. IEEE Annual Computers, Software, and Applications Conference (COMPSAC 2024), pp. 1554-1555, Jul. 2024. link
S. Sunahara, Y. Jin, and K. Iida, "Authoritative DNS Server Discovery Method to Enhance DNS Privacy Preservation," Proc. ACM CoNEXT Student Workshop 2023 (CoNEXT-SW'23), pp. 31-32, Dec. 2023. link
S. Sunahara, Y. Jin, and K. Iida, "A Proposal of DoH-based Domain Name Resolution Architecture including Authoritative DNS Servers," Proc. IEEE Int'l Telecommunication Networks and Applications Conference (ITNAC2022), pp. 1-3, Dec. 2022. link
ホームネットワークのためのSecure IoT
相良 隼, 金 勇, 砂原 悟, 飯田勝吉, 高井昌彰, "DNSとPCPを用いたプライバシー配慮型IoT遠隔制御システムの設計と評価," 信学技報, vol. 125, no. 385, NS2025-255, pp. 202-207, 2026年3月. link
H. Sagara, Y. Jin, K. Iida, and Y. Takai, "Privacy Preserved IoT Data Inquiry System using DoT," Proc. IEEE Conference on Cloud and Internet of Things (CIoT), pp. 1-6, Oct. 2024. link
相良 隼, 金 勇, 飯田勝吉, 高井昌彰, "DoTを用いたプライバシー配慮型IoTデータ照会システムの検討," 信学技報, vol. 123, no. 85, IA2023-10, pp. 56-61, 2023年6月. link