About me

Education & Experience:

• Gyeonggi Science High School, 2010

• B.S. Yonsei University, Electrical Electronics Engineering (advanced) , 2013

• M.S. Korea University, Graduate school of Information Security, 2018

• Ph.D. Korea University, Graduate school of Information Security, 2022

• Samsung Electronics - Security & Privacy team, Samsung Research, 2022.07 - 2025.12

• Samsung Electronics - Security & Privacy team, AI Platform center, 2026.01 - current

Special Interest in...

AI Agent Security

• Robust model against prompt injection (direct/indirect)

• Authentication & authorization in internal agents network

• Robust access control design

• Dynamic policy engine

• Usable security

Information security based on signal processing and machine learning

• Biometric Authentication

• Domain Adaptation (in Machine Learning)

• Physical Layer Security

• Multimedia Forensics

• Fraud/Forger detection

• System & Wireless Network Security

• Wireless Signal Localization

Publication

• Kang Hoon Lee, Youngbae Jeon, Ji Won Yoon, "Faster Homomorphic DFT and Speech Analysis for Torus Fully Homomorphic Encryption", Euro S&P 2024

• Hyunsoo Kim, Youngbae Jeon, Ji Won Yoon, "Invasion of location privacy using online map services and smartphone sensors", AsiaCCS 2023 

• HyeKyung Han, Youngbae Jeon, Baek-kyung Song, Ji Won Yoon, "A Phase-based Approach for ENF Signal Extraction from Rolling Shutter Videos" IEEE Signal Processing Letters, 2022 

• Youngbae Jeon, HyeKyung Han, Ji Won Yoon, "Manifold Learning-based Frequency Estimation for extracting ENF signal from digital video " International Conference on Pattern Recognition, ICPR 2022

• Youngbae Jeon, Ji Hyuk Jung, Ji Won Yoon, "Efficient Correlation Power Analysis (CPA) focusing on byte-wise calculation points.", IEEE ACCESS, 2021

• HyeKyung Han, KangHoon Lee, Youngbae Jeon, Ji Won Yoon, "Comparison of various interpolation techniques to infer localization of audio files using ENF signals", International Conference on Software Security and Assurance (ICSSA) 2020, Best Paper Award

• Youngbae Jeon, Ji Won Yoon, "Filtering-based Correlation Power Analysis (CPA) with signal envelopes against shuffling methods", The 21st World Conference on Information Security Applications (WISA) 2020, Best Paper Award)

• Il-Youp Kwak, Sungsu Kwag, Junhee Lee, Jun Ho Huh, Choong-Hoon Lee, Youngbae Jeon, Jeonghwan Hwang, Ji Won Yoon, "ResMax: Detecting Voice Spoofing Attacks withResidual Network and Max Feature Map", International Conference on Pattern Recognition (ICPR) 2020

• Youngbae Jeon, Minchul Kim, Hyunsoo Kim, Hyoungshick Kim, Jun Ho Huh and Ji Won Yoon, "I'm Listening to your Location! Inferring User Location with Acoustic Side Channel", Conference on World Wide Web (WWW) 2018

• Hyunsoo Kim, Youngbae Jeon and Ji Won Yoon, "Construction of a National Scale ENF map using online multimedia data", ACM International Conference on Information and Knowledge Management (CIKM) 2017

• Hyunsoo Park, Youngbae Jeon, and Ji Won Yoon, "A new approach to building a disguised server using the honey port against general scanning attacks", The 11-th International Conference on Broadband and Wireless Computing, Communication and Applications (BWCCA) 2016

Awards:

• 2007 Korean Mathematical Olympiad (KMO), middle school division, gold medal

• 2008 Korean Mathematical Olympiad (KMO), high school division, bronze medal

• 2009 Korean Mathematical Olympiad (KMO), high school division, silver medal, International Mathematical Olympiad (IMO) national squad school

• 2013 Korea Supercomputing Challenge, 2nd Prize, duo
  (http://hpcschool.kr/ksc2013/)

• 2014.05 ~ 2015.02 Store-Customer communication SNS application project based on Big-data (the Small and Medium Business Administration, 50,000,000won)

• 2015.12 Google Hackfair Exhibition team selected (3-people, http://googledevkr.blogspot.kr/2016/01/google-hackfair-2-metamong.html)

• 2017.11 Cyber Security Paper contest(KIISC, NSR, NIS), 2nd prize (link))