You can also find my papers on Google Scholar, or DBLP.
@misc{kim2026buckler,
title={{Towards Operator-Empowered Vulnerability Hotfixing for 5G Radio Access Networks}},
author={Dong Hyeok Kim and Xin Zhe Khooi and Hocheol Nam and Seungjin Baek and Mun Choon Chan and CheolJun Park and Min Suk Kang},
year={2026},
eprint={2608.30615},
archivePrefix={arXiv},
primaryClass={cs.CR},
}
We introduce ‘Heracles attack’ that uncover security risks in adaptive data-plane DoS defenses in programmable switches, and propose a new sketch mechnaism ‘Shield’ to mitigate Heracles attack.
@inproceedings{nam2026heracles,
title = {{On the Security Risks of Memory Adaptation and Augmentation in Data-plane DoS Mitigation}},
author = {Nam, Hocheol and Lim, Daehyun and Zhou, Huancheng and Gu, Guofei and Kang, Min Suk},
booktitle = {Proceedings of the 2026 Network and Distributed System Security Symposium (NDSS'26)},
pages = {1-20},
year = {2026},
}
@inproceedings{baek_mobisec25,
author = {Seungjin Baek and Hocheol Nam and Min Suk Kang},
title = {A Comparative Analysis of Cyber Attacks against Satellite Internet},
booktitle = {KIISC International Conference on Mobile Internet Security (MobiSec)},
year = {2025}
}
We examine frontrunning risks in batch-order fair blockchain systems (like Themis [CCS’23]) and propose the ‘Ambush attack’ that enables frontrunning attacks that remain possible despite fair-ordering guarantees.
@inproceedings{park2025frontrunning,
title = {{On Frontrunning Risks in Batch-Order Fair Systems for Blockchains}},
author={Park, Eunchan and Yoon, Taeung and Nam, Hocheol and Maram, Deepak and Kang, Min Suk},
booktitle = {Proceedings of the 32nd ACM Conference on Computer and Communications Security (CCS)},
year = {2025},
}
We introduce Forky, a fork state-aware differential fuzzing framework for finding semantic discrepancies in blockchain consensus implementations. We test Forky on Bitcoin and Ethereum, which are the representatives of the two major blockchain consensus algorithm families, PoW and PoS consensus algorithms.
@inproceedings{kim2025fork,
title = {{Fork State-Aware Differential Fuzzing for Blockchain Consensus Implementations}},
author = {Wonhoi Kim and Hocheol Nam and Muoi Tran and Amin Jalilov and Zhenkai Liang and Sang Kil Cha and Min Suk Kang},
booktitle = {Proceedings of the 47th IEEE/ACM International Conference on Software Engineering (ICSE'25)},
pages = {3048-3059},
year = {2025},
}
We re-evaluates claims that Bitcoin has slow block propagation. We show that block synchronization is actually fast enough, and that previous slow-propagation claims stemmed from bugs and limits in monitoring tools. We finally ask several open-ended questions regarding the technical and ethical issues around monitoring blockchain networks.
@inproceedings{baek2022short,
title={{Short paper: On the claims of weak block synchronization in Bitcoin}},
author={Baek, Seungjin and Nam, Hocheol and Oh, Yongwoo and Tran, Muoi and Kang, Min Suk},
booktitle={International Conference on Financial Cryptography and Data Security (FC)},
pages={663--671},
year={2022},
organization={Springer}
}
Presented in Jeju, South Korea, in October 2020.
@inproceedings{nam_ictc20,
author = {Hocheol Nam and Jaewon Park and Seunggyun Lee and Seunghyun Yeo and Seehwan Yoo},
title = {Hints for Memory Optimization of Asylo-based {SGX} Enclave Applications},
booktitle = {International Conference on ICT Convergence (ICTC)},
pages = {1685--1690},
year = {2020},
doi = {10.1109/ICTC49870.2020.9289344}
}
@inproceedings{lee_rtcsa20,
author = {Seunggyun Lee and Hocheol Nam and Jaewon Park and Seehwan Yoo},
title = {Student Session: Comparative Analysis of Live {VM} Migration with {SGX} Enclave},
booktitle = {IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA)},
year = {2020},
doi = {10.1109/RTCSA50079.2020.9203645}
}
프로그래머블 스위치 기반 데이터 평면의 런타임 재구성 시스템 비교 분석
저궤도 위성 기반 5G 비지상 네트워크의 축적 후 전달 운영 방식에서의 보안 및 프라이버시에 관한 연구
유한 상태 기계를 활용한 이동통신망 취약점 및 보안 패치 모델링 기법
xApp E2SM 취약점을 이용한 Open RAN상 공급망 공격
적응적인 네트워크 기능 개발을 위한 Open RAN 데이터 평면 구조 제안
VoIP 게이트웨이 사용 통화에서의 트래픽 워터마킹
4G/5G 단대단 음성 통화 테스트베드 환경 구축
Open RAN 구현 실험을 위한 환경 구축
개인정보 보호를 위한 안전한 기계학습 시스템의 비교 분석
SGX를 활용한 공유데이터 보호기법
VM 마이그레이션시 SGX 원격 인증 기술을 활용한 플랫폼 인증 기술 분석
안전한 클라우드 컴퓨팅 환경을 위한 보안 인클레이브와 VM 마이그레이션
가상 SGX를 포함한 VM 마이그레이션 기법의 비교 분석