BIO
Taekkyung Oh (TK) is a Ph.D candidate in System Security Lab at KAIST, advised by Professor Yongdae Kim. He received a Master degree from Graduate School of Information Security at KAIST. His research interests are Cellular Network Security, Wireless System Security, Cyber-Physical System (CPS) Security, and Usable Security.
- Affliation: KAIST
- Location: South Korea
- Email: ohtk[at]kaist.ac.kr
Research Interests
Cellular Network Security
Wireless System Security
Cyber-Physical System (CPS) Security
Usable Security
Educations
Ph.D of Engineering
September, 2021 - PresentGraduate School of Information Security at KAIST
Master of Engineering
September, 2019 - August, 2021Graduate School of Information Security at KAIST
Bachelor of Engineering
March, 2012 - August, 2019Electronic and Electrical Engineering at SKKU
Computer Engineering at SKKU
Publications
Denied by Border: Denial-of-Service Attack Exploiting Location Restrictions in Non-Terrestrial Networks (To appear)
Kwangmin Kim, Taekkyung Oh*, Yongdae Kim* (* co-corresponding authors) Proceedings of the 19th ACM Conference on Security and Privacy in Wireless and Mobile Networks (ACM WiSec'26)LLFuzz: An Over-the-Air Dynamic Testing Framework for Cellular Baseband Lower Layers [PDF][Code][Media-KR][Media-EN]
Tuan Dinh Hoang, Taekkyung Oh, CheolJun Park, Insu Yun, Yongdae Kim Proceedings of the 34th USENIX Security Symposium (Security'25)Passive Three-Dimensional User Equipment Tracking Using Long-Term Evolution Uplink Signals [PDF]
Yooho Jang, Juhong Park, Taekkyung Oh, Yongdae Kim, Seong Ook Park IEEE Transactions on Instrumentation and Measurement (IEEE TIM'25)Enabling Physical Localization of Uncooperative Cellular Devices [PDF][Site]
Taekkyung Oh, Sangwook Bae, Junho Ahn, Yonghwa Lee, Tuan Dinh Hoang, Min Suk Kang, Nils Ole Tippenhauer, Yongdae Kim Proceedings of the 30th Annual International Conference on Mobile Computing and Networking (ACM MobiCom'24)Void: A fast and light voice liveness detection system [PDF]
Muhammad Ejaz Ahmed, Il-Youp Kwak, Jun Ho Huh, Iljoo Kim, Taekkyung Oh, Hyoungshick Kim Proceedings of the 29th USENIX Security Symposium (Security'20)(Poster) I Can’t Hear This Because I Am Human: A Novel Design of Audio CAPTCHA System [PDF]
Jusop Choi, Taekkyung Oh, William Aiken, Simon S. Woo, Hyoungshick Kim Proceedings of the 11th ACM Asia Conference on Computer and Communications Security (ACM ASIACCS'18)Vulnerability Reports (CVE)
CVE-2025-20708
CVE | MediaTek Security Bulletin | Memory corruption in MediaTek modem chipsetsCVE-2024-48883
CVE | Samsung Security Bulletin | Android Security Acknowledgements | Information leakage in Samsung and Google modem chipsetsCVE-2024-23385
CVE | Qualcomm Security Bulletin | Memory corruption in Qualcomm modem chipsetsCVE-2024-20077
CVE | MediaTek Security Bulletin | Memory corruption in MediaTek modem chipsetsCVE-2024-20076
CVE | MediaTek Security Bulletin | Memory corruption in MediaTek modem chipsetsVulnerability Reports (GSMA CVD)
GSMA Coordinated Vulnerability Disclosure [WWW]
CVD-2026-0115 | Vulnerability in location restriction mechanism in Non-terrestrial networks (NTN) CVD-2023-0077 | Vulnerability in uplink scheduling mechanism in LTE networks CVD-2023-0070 | Vulnerability in radio control mechanism in LTE networksInvited Talks
srsRAN Project Fall Workshop 2023 [Video]
SRS (Software Radio Systems) | Arlington, Virginia, USA | October, 2023Testing, Analyzing, Improving Security of Cellular Networks with srsRAN (with Yongdae Kim)
Projects
Development of a fake base station detection system in cellular networks (visiting research at University of Florida)
Global Advanced Cybersecurity Human Resources Development program, South Korea | Funded 24K USD | October, 2025 - April, 2026Principal Investigator
Developing a technology for bypassing fake base station detection methods
National Intelligence Service (NIS), South Korea | Funded 100K USD | March, 2025 - December, 2025Project Manager
Developing a technology for detecting an open-source based fake base station
National Intelligence Service (NIS), South Korea | Funded 100K USD | February, 2024 - December, 2024Project Manager
Tracking and identifying devices and call traffic in voice phishing ecosystem
National Police Agency, South Korea | Funded 4.5 million USD | April, 2022 - December, 2024Project Manager
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