Ziyun Guo
Research Engineer · Singapore Management University
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About Me
I am a Research Engineer in Computer Science at Singapore Management University (SMU). I received my Master's degree in Cyber Security from Nanyang Technological University (NTU), Singapore. My research focuses on software security and intelligent testing, with work spanning GUI testing automation, penetration testing, and LLM-powered security analysis.
Research Experience
Jul 2025 – Present
Identifying Compatibility Issues in LLM-powered Webpages
Singapore Management University (SMU)
- Participate in an empirical study on cross-browser and cross-device issues in LLM-generated webpages.
- Contribute to the design of a test oracle and automated framework for evaluating UI rendering consistency across platforms.
- Analyze incompatibility patterns between LLM-generated and human-developed webpages, and explore mitigation strategies.
Nov 2024 – May 2025
Harnessing Large Language Models for Software Security
- Conducted an empirical evaluation of multiple LLMs for vulnerability discovery, tool orchestration, and multi-stage attack-chain planning.
- Augmented the PentestGPT framework with RAG and knowledge-graph reasoning to improve command fidelity and context retention.
- Refactored the system for modular, multi-model integration (Ollama-compatible), demonstrating the feasibility of scalable LLM-powered code analysis workflows.
Mar 2021 – Jul 2023
Knowledge Copyright Protection System for Short Video Content
- Developed a program for analyzing content plagiarism in short videos, proposing a copyright protection solution based on graph neural networks and smart contracts.
- Identified video content using GCN model, demonstrating effective content recognition capability.
Jun 2021 – Aug 2022
Research on Automated Attack Planning
- Proposed a knowledge-graph-based framework to construct an attack behavior database for automated attack route planning.
- Developed a web crawler to collect vulnerability records from the National Vulnerability Database (NVD) and technical blog texts.
- Applied NLP techniques for named entity recognition and knowledge graph ontology construction.
Internship Experience
Oct 2023 – Jan 2024
NetEase · Beijing
Intern, Quality Assurance Department
- Conducted quality checks for multiple projects during release phases.
- Participated in regression GUI testing, ensuring software stability and integrity after updates.
- Identified and reported bugs across various test cycles.
May 2023 – Jun 2023
NSFOCUS Technologies Group · Chengdu
Intern, Cybersecurity Technology Department
- Tested and developed the next-generation gateway firewall.
- Designed test cases covering extensive API parameters and detected multiple bugs.
- Completed automated test scripts and analyzed results from test logs.
Education
Aug 2024 – Present
Nanyang Technological University (NTU)
Master of Science in Cyber Security
Sep 2020 – Jun 2024
Undergraduate
Bachelor of Engineering in Cyber Security
