Education

• Ph.D. in Computer Science and Engineering, Seoul National University of Science and Technology (Seoultech) (2024.09 - Ongoing.)

• M.S. in Computer Science and Engineering, Seoul National University of Science and Technology (Seoultech) (2022.09 - 2024.08)

  • Master Thesis 

    • Effective Logging and Monitoring Scheme in Heterogeneous Cloud Environments.

    • 이기종 클라우드 환경을 위한 효과적인 로깅 및 모니터링 체계.

    • Advisor: Prof. Sunggon Kim

• B.S. in Electrical Engineering, Myongji College (2013.03 - 2020.02) 

*Including bachelor's degree program 

Experience

• Presentation @ KCC 2026 - Top Conference Session (2026.06)

  • Topic: ScaleQsim: Highly Scalable Quantum Circuit Simulation Framework for Exascale HPC Systems (SIGMETRICS'26)

• Teaching @ Graduate Course, Cloud Computing Security (2026.03-06)

  • Instructor, Department of Computer Science and Engineering, Seoul National University of Science and Technology

• Internship @ Collaborative Research with Berkeley Lab (USA)  (2026.01)

  • Research Topic: Research on quantum simulation in HPC systems (Our focus direction and future direction)

• Presentation and Research @ Summer visit from Berkeley Lab (USA) (2025.08)

  • Topic: Previous and ongoing research on quantum circuit simulation. 

• Database Engineer @ TmaxData (2020.11 ~ 2022.07) 

  • Designed data preprocessing pipelines and optimized SQL queries for large-scale data processing workloads.

  • Improved performance of DBMS systems (Tibero, Oracle, MySQL, Sybase IQ/ASE) through schema redesign, indexing, and partitioning strategies.

  • Deployed and operated Hadoop clusters and Hive BI platforms in Kubernetes environments.

  • Diagnosed and resolved system-level performance bottlenecks in Tibero-based database infrastructures.

  • Managed database patching, schema versioning, and controlled release cycles, including major, minor, and hotfix updates.

Publications

2026

[13] AURORA-Q: Asynchronous Unified Resource Optimizer for Quantum Simulation on HPC System  

• Changjong Kim, Alex Sim, Kesheng Wu, Houjun Tang, Yongseok Son, Jisung Park, and Sunggon Kim

• [BK21, IF: 3]  IEEE International Conference on Distributed Computing Systems (ICDCS'26) 

• Seoul, Korea, June 22-25, 2026, Accepted for Publication (18.59% acceptance rate) [Paper Link]

[12] CITADEL: Fortifying IoT via Context-Aware Offloading of Post-Quantum Cryptography

• • Ehan Sohn, Changjong Kim, and Sunggon Kim

  • [BK21, IF: 3]  IEEE International Conference on Distributed Computing Systems (ICDCS'26) 

  • Seoul, Korea, June 22-25, 2026, Accepted for Publication (18.59% acceptance rate) [Paper Link]

[11] ScaleQsim: Highly Scalable Quantum Circuit Simulation Framework for Exascale HPC Systems

• • Changjong Kim, Ehan Sohn, Seunghwan Kim, Alex Sim, Kesheng Wu, Houjun Tang, Yongseok Son, and Sunggon Kim

  • [BK21, IF: 3] ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS' 26)

  • Ann Arbor, Michigan, June 8-12, 2026 (23/111, 20.7% acceptance rate), Accepted for Publication [School News Link] [Paper Link]

2025

[10] Secure and Scalable File Encryption for Cloud Systems via Distributed Integration of Quantum and Classical Cryptography

• • Changjong Kim, Seunghwan Kim, Kiwook Sohn, Yongseok Son, Manish Kumar, and Sunggon Kim

  • [SCIE, IF: 2.5, JIF 24%] MDPI Applied Sciences  [Paper Link]

[9] Toward Performance Prediction in Large-Scale Systems through Temporal System and Application Log Analysis

• • Ehan Sohn, Changjong Kim, Alex Sim, Dong Kyu Sung, Yongseok Son, Jisung Park, and Sunggon Kim

  • [BK21 Conference, IF: 2] 38th IEEE International Parallel & Distributed Processing Symposium (IPDPS'24), Poster Program

  • Milan, Italy [Paper Link]

[8] SWIFTN: Accelerating Quantum Circuit Simulation through Tensor Optimization

• • Seunghwan Kim*, Changjong Kim*, Alex Sim, Kesheng Wu, Houjun Tang, and Sunggon Kim (*Co-1st author) 

  • [BK21 Conference, IF: 1] 25th IEEE/ACM International Symposium on Cluster, Cloud, and Grid Computing (CCGrid'25) 

  • Tromsø, Norway, Accepted for Publication (55/219, 25% acceptance rate), Corresponding author: Sunggon Kim [Paper Link]

[7] Improving performance of real-time object detection in edge device through concurrent multi-frame processing

• • Seunghwan Kim, Changjong Kim, and Sunggon Kim*

  • [SCIE, IF: 3.9, JCR 33.6%] IEEE ACCESS

[6] Investigating the Effects of SQL Hints on Diverse Storage Devices through Empirical Analysis

• Changjong Kim, Yongseok Son, and Sunggon Kim*

• [SCIE, IF: 3.6, JCR 19.9%] Cluster Computing [Paper Link]

2024

[5] Enhancing Cloud Security for IoHT: A Dual-Layer Scheme Combining Quantum Key Distribution and Post-Quantum Cryptography 

• Changjong Kim, Seunghwan Kim and Sunggon Kim*

• [International Conference] MobiSec 2024

• Supported by RS-2024-00437252 (이동통신 AirGap 환경에서 스니핑 방지 기술 개발, IITP)

• December 17-19 2024, Sapporo, Japan, Corresponding author: Sunggon Kim

[4] A2FL: Autonomous and Adaptive File Layout in HPC through Real-time Access Pattern Analysis

• • Dong Kyu Sung, Yongseok Son, Alex Sim, Kesheng Wu, Suren Byna, Houjun Tang, Hyeonsang Eom, Changjong Kim, Sunggon Kim*

  • [BK21 Conference, IF: 2] 38th IEEE International Parallel & Distributed Processing Symposium (IPDPS'24)

  • San Francisco, USA, May 27-31, 2024, Corresponding author: Sunggon Kim [Paper Link]

[3] Empowering Cyberattack Identification in IoHT Networks with Neighborhood Component-based Improvised Long Short-Term Memory

• • Manish Kumar, Changjong Kim, Yongseok Son, Sushil Kumar Singh, Sunggon Kim*

  • [SCIE, IF: 10.6, JCR 2.2%] IEEE Internet of Things Journal 

2023

[2] Optimizing Logging and Monitoring in Heterogeneous Cloud Environments for IoT and Edge Applications   

• • Changjong Kim, Sunggon Kim*

  • [SCIE, IF: 10.6, JCR Top 3%] IEEE Internet of Things Journal] 

  • Accepted for Publication  [Paper Link] [School News Link]

[1] Towards Access Pattern Prediction for Big Data Applications.

• • Changjong Kim, Yongseok Son, Sunggon Kim*

  • [International Conference] In Proceedings of International Conference on ICT Convergence (ICTC'22) 

  • Jeju, Oct 19-21, 2022 [Paper Link]

Domestic Publications (Republic of Korea)

2026

자원 제약적 IoT 장치 기반의 소규모 양자 회로 시뮬레이션 아키텍처 연구

• • • 김창종, 손이한, Zainab Rizvi, 김성곤

    • 한국컴퓨터종합학술대회 (Korea Computer Congress, KCC 2026) Poster 세션 - 컴퓨터시스템 분야

    • Jeju, Korea, June 24-26, 2026

대규모 HPC 시스템의 시스템 부하 및 아키텍처 특성에 따른 전력 소비 변동성 분석 연구

• • • 손이한, 김창종, 최태빈, 김성곤

    • 한국컴퓨터종합학술대회 (Korea Computer Congress, KCC 2026) 발표 세션 - 고성능컴퓨팅 분야

    • Jeju, Korea, June 24-26, 2026

Project

• Bigdata and HPC lab (Seoultech)

1) Research on the Structural Improvement of High-Performance Parallel Processing Systems (2022.09 - 2022.11)

- Supreme Prosecutor's Office

• TmaxData (2020.11 ~ 2022.07) 

1) BI product GS certification acquisition (2021.11 - 2022.01)

- Optimize flow queries within the data preprocessing functionality.

- RepoDB optimization and query engine improvement (Tibero).

2) IBK POC Major/Minor/Hotfix releases (2022.04 - 2022.07)

- Optimize flow queries within the data preprocessing functionality.

- RepoDB optimization and query engine improvement (Tibero).

- Product optimization efforts due to the addition of Apache Hive.

- Implementation of virtualization processing through Virtual Database.