I am a Postdoctoral Research Associate in the Department of Computer Science at the University of Virginia, working with Prof. Yixin Sun. I earned my Ph.D. and B.S. degrees in Computer Science and Engineering from Seoul National University, where I was co-advised by Prof. Taekyoung “Ted” Kwon (Seoul National University) and Prof. Taejoong “Tijay” Chung (Viginia Tech).

[ANNOUNCEMENT] I will be joining Hanyang University ERICA as a tenure-track Assistant Professor in the Division of Computer Science, College of Computing, starting in Spring 2026.

Research Interests

  • Network Security: Securing Internet infrastructure through data-driven security analysis, protocol development and optimization, and threat mitigation.
  • Key Topics: Domain Name System (DNS), Public Key Infrastructure (PKI), Transport Layer Security (TLS), and Email security.

Positions

  • Postdoctoral Research Associate
    Oct 2023 - Present

    University of Virginia, Charlottesville, VA, United States

  • Postdoctoral Researcher
    Apr 2022 - Sep 2023

    Seoul National University, Seoul, South Korea

Education

  • Ph.D., Computer Science and Engineering
    Mar 2016 - Feb 2022

    Seoul National University, Seoul, South Korea

  • B.S., Computer Science and Engineering
    Mar 2011 - Feb 2016

    Seoul National University, Seoul, South Korea

  • Visiting student, Information Technology
    Fall 2014

    Uppsala University, Uppsala, Sweden

Publications

PQTLS-AD: Post-Quantum TLS Accelerated with DNS
Sangwon Lim, Hyeonmin Lee, Gyeongheon Jeong, and Taekyoung Kwon
In Proceedings of the International Conference on Computer Communications and Networks  (ICCCN'25) Tokyo, Japan Aug 2025

PAVE: Information Flow Control for Privacy-preserving Online Data Processing Services
Minkyung Park, Jaeseung Choi, Hyeonmin Lee, and Taekyoung Kwon
In Proceedings of the ACM International Conference on Architectural Support for Programming Languages and Operating Systems  (ASPLOS'25) Rotterdam, Netherlands Mar 2025
PDF

Exploring the Ecosystem of DNS HTTPS Resource Records: An End-to-End Perspective
Hongying Dong, Yizhe Zhang, Hyeonmin Lee, Shumon Huque, and Yixin Sun
In Proceedings of the ACM Internet Measurement Conference  (IMC'24) Madrid, Spain Nov 2024
PDF Dataset DNS-OARC Presented

Mutual TLS in Practice: A Deep Dive into Certificate Configurations and Privacy Issues
Hongying Dong, Yizhe Zhang, Hyeonmin Lee, Kevin Du, Guancheng Tu, and Yixin Sun
In Proceedings of the ACM Internet Measurement Conference  (IMC'24) Madrid, Spain Nov 2024
PDF Code

DDD: A DNS-based DDoS Defense Scheme Using Puzzles
Hyeonmin Lee, Taehyun Kang, Sukhun Yang, Jinyong Jun, and Taekyoung Kwon
In Proceedings of the International Conference on Computer Communications and Networks  (ICCCN'24) Big Island, Hawaii, United States Jul 2024
PDF Code

ZTLS: A DNS-based Approach to Zero Round Trip in TLS handshake
Sangwon Lim, Hyeonmin Lee, Hyunsoo Kim, Hyunwoo Lee, and Ted ‘‘Taekyoung’’ Kwon
In Proceedings of the ACM Web Conference  (TheWebConf'23 (formerly WWW)) Austin, United States Apr 2023
PDF Code

Under the Hood of DANE Mismanagement in SMTP
Hyeonmin Lee, Md. Ishtiaq Ashiq, Moritz Müller, Roland van Rijswijk-Deij, Taekyoung ‘‘Ted’’ Kwon, and Taejoong Chung
In Proceedings of the USENIX Security Symposium  (USENIX Security'22) Boston, United States Aug 2022
PDF Dataset

A Longitudinal and Comprehensive Study of the DANE Ecosystem in Email
Hyeonmin Lee, Aniketh Gireesh, Roland van Rijswijk-Deij, Taekyoung ‘‘Ted’’ Kwon, and Taejoong Chung
Poster Session in the USENIX Security Symposium  (USENIX Security'22) Boston, United States Aug 2022
Link

A Longitudinal and Comprehensive Study of the DANE Ecosystem in Email
Hyeonmin Lee, Aniketh Gireesh, Roland van Rijswijk-Deij, Taekyoung ‘‘Ted’’ Kwon, and Taejoong Chung
In Proceedings of the USENIX Security Symposium  (USENIX Security'20) Boston, United States Aug 2020
PDF Dataset

TwinPeaks: An Approach for Certificateless Public Key Distribution for the Internet and Internet of Things
Eunsang Cho, Jeongnyeo Kim, Minkyung Park, Hyeonmin Lee, Chorom Hamm, Soobin Park, Sungmin Sohn, Minhyeok Kang, Ted ‘‘Taekyoung’’ Kwon
Elsevier Computer Network  (SCI-E) Jul 2020
PDF

Development of Cellular Core Network Enabling Network Function Virtualization
Hyeonmin Lee, Junghwan Song, and Taekyoung Kwon
The Joint Conference on Communications and Information  (JCCI'18) Yeosu, South Korea May 2018

Professional Experiences

 
 
 
 
 

Postdoctoral Research Associate

Dept. of Computer Science, University of Virginia (UVA)

Oct 2023 – Present Charlottesville, VA, United States
Supervisor: Yixin Sun
 
 
 
 
 

Postdoctoral Researcher

Dept. of Computer Science and Engineering, Seoul National University (SNU)

Apr 2022 – Sep 2023 Seoul, South Korea
Supervisor: Taekyoung ‘Ted’ Kwon
 
 
 
 
 

Visiting Student

The Center for Cybersecurity, Rochester Institute of Technology (RIT)

May 2019 – Aug 2019 Rochester, NY, United States
Supervisor: Taejoong ‘Tijay’ Chung

Research Project Experiences (Selected)

A Study for the Future-oriented DANE-based Web Architecture to Solve Problems in the Current TLS-based Web Ecosystem
Supported by Basic Science Research Program - National Research Foundation of Korea (NRF)
Sep 2022 - Aug 2023
Primary Investigator

Research on Secure DNS and Privacy aware Packet Filtering Technology
Supported by Samsung Electronics
Aug 2022 - Jul 2023
System Designer / Programmer

Abnormal Detection and Forensic Techniques using IoT Network Traffic Analysis
Supported by Korea Institute of Information Security & Cryptology (KIISC)
Mar 2021 - Nov 2021
Project Manager (Lab.) / System Designer / Programmer

Versatile Network System Architecture for Multi-dimensional Diversity
Supported by Institute for Information and Communication Technology Promotion (IITP)
Apr 2016 - Dec 2020
Project Manager (Lab.) / System Designer / Programmer

Patents

Homomorphic Cryptographic Parallel Computation Method and Computing Device Performing the Same Method
Taekyoung Kwon, Minkyung Park, Minhyeok Kang, Selin Chun, Hyeonmin Lee
Registration No. 10-2513552 South Korea Mar 2023

Method for Performing Mutual Authentication in Communication using Locator ID Separation Protocol, Apparatus, and System for Performing the Same
Ted ‘‘Taekyoung’’ Kwon, Hyeonmin Lee, Hyunwoo Lee
Registration No. 10-2476081 South Korea Dec 2022

Network System and Method for Performing Message Security Thereof
Ted ‘‘Taekyoung’’ Kwon, Hyunwoo Lee, Myungchul Kwak, Hyeonmin Lee, Junghwan Lim, Yoojung Shin
Registration No. 10-2265611 South Korea Jun 2021

Communication Method Based on Integrated Flat ID and System
Ted ‘‘Taekyoung’’ Kwon, Hyunwoo Lee, Myungchul Kwak, Hyeonmin Lee, Dongjun Lee, Hyunchul Oh
Registration No. 10-2023115 South Korea Sep 2019

Talks & Presentations

Sep 2022 APNIC Blog Online post
Under the Hood of DANE Mismanagement in SMTP
Link

Aug 2022 USENIX Security Boston, United States
Under the Hood of DANE Mismanagement in SMTP
Slides Video

Aug 2020 USENIX Security Online
A Longitudinal and Comprehensive Study of the DANE Ecosystem in Email
Slides Video

Contact

  • frv9vh [at] virginia [dot] edu