Taekkyung Oh is a Ph.D student 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 Security Engineering, Cellular Network Security, Cyber-Physical System (CPS) Security, and Usable Security.

  • Affliation: KAIST
  • Location: South Korea
  • Email: ohtk[at]

Research Interests

Security Engineering

Cellular Network Security

Cyber-Physical System (CPS) Security

Usable Security


Ph.D of Engineering

September, 2021 - Present

Graduate School of Information Security at KAIST

Master of Engineering

September, 2019 - August, 2021

Graduate School of Information Security at KAIST

Bachelor of Engineering

March, 2012 - August, 2019

Electronic and Electrical Engineering at SKKU

Computer Engineering at SKKU


LTESniffer: An Open-source LTE Downlink/Uplink Eavesdropper [PDF] [Code]

Tuan Dinh Hoang, CheolJun Park, Mincheol Son, Taekkyung Oh, Sangwook Bae, Junho Ahn, Beomseok Oh, Yongdae Kim Proceedings of the 16th ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec'23)

Void: A fast and light voice liveness detection system [PDF]

Muhammad Ejaz Ahmed, Il-Youp Kwak, Jun Ho Huh, Iljoo Kim, Taekkyung Oh, and Hyoungshick Kim Proceedings of the 29th USENIX Security Symposium (Security'20)

Hey Siri – are you there?: Jamming of voice commands using the resonance effect [PDF]

Taekkyung Oh, William Aiken, and Hyoungshick Kim The 4th International Conference on Software Security and Assurance (ICSSA'18)

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, and Hyoungshick Kim Proceedings of the 11st ACM Asia Conference on Computer and Communications Security (ASIACCS'18)

Vulnerability Reports

Common Vulnerabilities and Exposures (CVE)

CVE-2024-20076 & CVE-2024-20077 | Memory corruption in MediaTek chipsets

GSMA Coordinated Vulnerability Disclosure [WWW]

CVD-2023-0070 | Vulnerability in radio control mechanism in LTE networks CVD-2023-0077 | Vulnerability in uplink scheduling mechanism in LTE networks

Invited Talks

srsRAN Project Fall Workshop 2023 [Video]

SRS (Software Radio Systems) | Arlington, Virginia, USA | October, 2023

Testing, Analyzing, Improving Security of Cellular Networks with srsRAN (with Yongdae Kim)

Security Intelligence Summit (SIS) 2022 .ON [WWW] [WWW]

S2W Inc. (cybersecurity company) | Seoul, South Korea | November, 2022

Voice Phisher Intelligence: Location tracking and infrastructure vulnerability analysis

Paper Reviews


Usenix Security 2023 | External Reviewer NDSS 2021 | External Reviewer NDSS 2020 | External Reviewer


Tracking and identifying devices and call traffic in voice phishing ecosystem

National Police Agency, South Korea | Funded 4.5 million USD | April, 2022 - September, 2024

Project Manager

Honors & Awards

Korean Government Scholarship

September, 2019 - Present

Full-Ride Scholarship

Undergraduate Research Conference by College of Software

SKKU | November, 2018

Bronze Prize

Dean's List

SKKU | September, 2017 & September, 2018

Reward for students who got obvious scholar performance (Top 5%)

Global Idea Contest

Dongbu Daewoo Electronics | November, 2017 Development of noise canceling technique for home appliances

Honorable Metion

Idea Contest of Assistive Technology Device for Disabled Students

Ministry of Education, South Korea | December, 2016 Development of function-graph converter for blind

First Prize (Award by Minister of Education)


Republic of Korea Marine Corps

April, 2023 - December, 2024

External Security Advisor

Teaching Assistant, KAIST

[EE488] Introduction to Cryptography Engineering | 2022 Spring [EE515] Theory of Hacking (Security 101) | 2021 Fall [CS448] Introduction to Information Security | 2021 Spring [IS521] Information Security Laboratory | 2020 Fall

Ministry of Education, South Korea

December, 2019

External Software Advisor

Security Lab, SKKU [WWW]

December, 2016 - December, 2018

Undergraduate Researcher

System Consultant Group, SKKU [WWW]

March, 2016 - July, 2017

Web Developer

Republic of Korea Army

October, 2013 - June, 2015

Combat Engineer