Publications

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International Papers

2026

  1. NDSS

    On the Security Risks of Memory Adaptation and Augmentation in Data-plane DoS Mitigation

    Network and Distributed System Security Symposium (NDSS), San Diego, CA, USA, 2026

    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.

    BibTeX
    @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},
    }
    

2025

  1. MobiSec

    A Comparative Analysis of Cyber Attacks against Satellite Internet

    KIISC International Conference on Mobile Internet Security (MobiSec), Sapporo, Japan, 2025
    BibTeX
    @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}
    }
    
  2. CCS

    On Frontrunning Risks in Batch-Order Fair Systems for Blockchains

    ACM SIGSAC Conference on Computer and Communications Security (CCS), Taipei, Taiwan, 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.

    BibTeX
    @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},
    }
    
  3. ICSE

    Fork State-Aware Differential Fuzzing for Blockchain Consensus Implementations

    IEEE/ACM International Conference on Software Engineering (ICSE), Ottawa, ON, Canada, 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.

    *Co-first authors
    BibTeX
    @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},
    }
    

2022

  1. FC

    Short Paper: On the Claims of Weak Block Synchronization in Bitcoin

    Financial Cryptography and Data Security (FC), St. George's, Grenada, 2022

    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.

    *Co-first authors
    BibTeX
    @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}
    }
    

2020

  1. ICTC

    Hints for Memory Optimization of Asylo-based SGX Enclave Applications

    International Conference on ICT Convergence (ICTC), Jeju, South Korea, 2020

    Presented in Jeju, South Korea, in October 2020.

    BibTeX
    @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}
    }
    
  2. RTCSA

    Student Session: Comparative Analysis of Live VM Migration with SGX Enclave

    IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA), Virtual, 2020
    BibTeX
    @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}
    }
    

Domestic Papers

2026

  1. KCC

    A Comparative Analysis of Runtime Reconfigurable Data Plane Systems on Programmable Switches

    KIISE Korea Computer Congress (KCC), 2026

    프로그래머블 스위치 기반 데이터 평면의 런타임 재구성 시스템 비교 분석

  2. KCC

    On the Security and Privacy of the Store-and-Forward Operation in 5G LEO NTN

    KIISE Korea Computer Congress (KCC), 2026

    저궤도 위성 기반 5G 비지상 네트워크의 축적 후 전달 운영 방식에서의 보안 및 프라이버시에 관한 연구

2025

  1. CISC-S

    Modeling Cellular Network Vulnerabilities and Security Patches Using Finite State Machines

    KIISC Conference on Information Security and Cryptography Summer (CISC-S), 2025

    유한 상태 기계를 활용한 이동통신망 취약점 및 보안 패치 모델링 기법

2024

  1. KSC

    Open RAN Supply Chain Attack Exploiting xApp E2SM Vulnerability

    KIISE Korea Software Congress (KSC), 2024

    xApp E2SM 취약점을 이용한 Open RAN상 공급망 공격

  2. KCC

    Open RAN Data-plane Structure for Adaptive Network Function Development

    KIISE Korea Computer Congress (KCC), 2024

    적응적인 네트워크 기능 개발을 위한 Open RAN 데이터 평면 구조 제안

2023

  1. CISC-W

    Traffic Watermarking on Calls Using a VoIP Gateway

    KIISC Conference on Information Security and Cryptography Winter (CISC-W), 2023

    VoIP 게이트웨이 사용 통화에서의 트래픽 워터마킹

  2. CISC-S

    Constructing a 4G/5G Cellular Testbed for End-to-end Voice Calls

    KIISC Conference on Information Security and Cryptography Summer (CISC-S), 2023

    4G/5G 단대단 음성 통화 테스트베드 환경 구축

  3. KCC

    Constructing an Open RAN Test Environment

    KIISE Korea Computer Congress (KCC), 2023

    Open RAN 구현 실험을 위한 환경 구축

2021

  1. KCC

    A Comparative Analysis of Secure Privacy-Preserving Machine Learning Systems

    KIISE Korea Computer Congress (KCC), 2021

    개인정보 보호를 위한 안전한 기계학습 시스템의 비교 분석

2020

  1. WDSC

    Shared Data Protection Technique with SGX

    Workshop on Dependable and Secure Computing (WDSC), 2020

    SGX를 활용한 공유데이터 보호기법

  2. KICS-S

    Analysis of Platform Attestation Technology Using SGX During VM Migration

    KICS Summer Conference (KICS-S), 2020

    VM 마이그레이션시 SGX 원격 인증 기술을 활용한 플랫폼 인증 기술 분석

  3. KICS-S

    VM Migration with Secure Enclave for Secure Cloud Computing

    KICS Summer Conference (KICS-S), 2020

    안전한 클라우드 컴퓨팅 환경을 위한 보안 인클레이브와 VM 마이그레이션

  4. KCC

    A Comparative Analysis of VM Migrations with Virtual SGX

    KIISE Korea Computer Congress (KCC), 2020

    가상 SGX를 포함한 VM 마이그레이션 기법의 비교 분석