About Me

Hello, I’m Yumi An.

I focus on making systems safer and more reliable through a scenario β€” identifying vulnerabilities, designing realistic attack/defense cases, and delivering improvements that strengthen user trust.

I observe systems with the quiet precision of an owl β€” recognizing patterns, anticipating risks, and understanding how threats move across boundaries.

My work turns technical insights into actionable outcomes, supporting proactive defense. cross-domain feedback, and risk-aware decision-making.


Quote

β€œIf you want something you’ve never had, you must be willing to do something you’ve never done.”

This quote has guided me from the start β€” especially when facing the unfamiliar.

It’s why I chose security: to take what exists, step into its gaps, and make it safer and leave it safer, and better than before.

ChatGPT Image 2025λ…„ 5μ›” 30일 μ˜€ν›„ 08_24_36.png

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πŸ“«Contact

πŸ–‡οΈ LinkedIn

https://www.linkedin.com/in/yumi-an-4a7357344/

πŸ–‡οΈ Github

BarnOwl5 - Overview

πŸ–‡οΈ Email

ahnyumi00@gmail.com

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Skills

Skills (1)

Projects

Active Tasks


Honors and Awards

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πŸ† Best Project Award – Web Security Research & Mitigation

Recognized for contributing to a team project that identified and mitigated real-world web vulnerabilities, with a focus on practical application under tight constraints.

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πŸ“œ KISIA (Korea Information Security Industry Association)

Security Academy 4th Batch Completion


On-tact Converged Security Training - OT Security 16H

Living Lab

πŸ’‘ A space for lightweight research and hands-on ideas

A living record of experiments and small-scale explorations in security. Not every idea works, but every step is part of the journey I want to share.

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