I am a Security Software Engineer specializing in bridging the gap between Security Research and System Implementation. I have hands-on experience in building AI-based detection engines and scalable security monitoring systems.

• 🔍 Main Focus: Privacy Protection (PII Detection), Log Analysis (ELK), and Endpoint Security.
• 🚀 Goal: Building robust security solutions that handle real-world threat data at scale.

Developing a full-stack engine for detecting personally identifiable information (PII).

• Built multi-channel pipelines for Local Files, DB, and Network Packets.
• Implemented NER-based NLP models to optimize detection accuracy.
• Designed REST APIs for seamless integration with enterprise systems.
• Key Takeaway: Handled real-world privacy data pipelines and optimized detection performance.

Real-time PII filtering layer for LLM services.

• Designed a pre/post-processing privacy filter for LLM prompts and outputs.
• Applied NER + rule-based hybrid detection for sensitive data.
• Implemented WebSocket-based streaming interception.
• Key Takeaway: Ensured privacy compliance in AI-driven services.

End-to-end security monitoring and visualization pipeline.

• Built Logstash pipelines to ingest raw security logs.
• Designed custom Elasticsearch indices for anomaly and attack pattern detection.
• Developed Kibana dashboards for real-time incident response.

Automated reconnaissance and threat detection tool.

• Scans robots.txt and sitemap.xml to map attack surfaces.
• Detects malicious JavaScript keywords to identify client-side threats.

Research on password generation and pattern learning for Korean users.

• Fine-tuned models using RockYou + Korean password datasets.
• Analyzed keyboard-based input patterns over linguistic assumptions.
• Evaluated limitations of PCFG-based approaches.
• Key Takeaway: Conducted data-driven security research beyond conventional heuristics.

• EDR & Endpoint Security
  • User-mode process behavior monitoring
  • PID ↔ Network connection correlation
• Malware Analysis
  • PE file structure, import table, execution flow
• Detection Engines
  • Antivirus plugin-based engine architecture
  • Kernel ↔ User-mode interface design
• Privacy Engineering
  • PII detection & masking pipelines
  • AI-assisted data protection systems