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Kin =]

HKer, InfoSec enthusiast, passionate about GNU/Linux, Web security, and open source.

CTF Team ICEDTEA HeapUnderFlow
Challenge Creator NHNC CTF THJCC CTF
Hacking TryHackMe HackTheBox CryptoHack
Creator UmmItOS
Candidate OSCP CWES CJCA PT1

I’ve been self-taught computer stuff since I was a kid, and I’m currently studying InfoSec in Hong Kong. My interests are wide-ranging — red teaming, reverse engineering, web development, web hacking, and app development. As you see, mostly are related to software hacking stuff. I started seriously learning around middle school, beginning with HTML, CSS, and JavaScript, then moving on to C#, VB.NET, and more. Those are mostly behind me now. I’m focused on web hacking and redteam work now.

Also, I'm a huge GNU/Linux enthusiast. I've used at least 20 different GNU/Linux distros and experiments. I currently use Arch Linux as my main system and have been using it for seven years. Yes, I'm still a student, but I already have over seven years of experience. I actually started back in secondary school. Right now I'm using my own Arch-based distribution called UmmItOS named after my internet nickname. XD

I used to be a Windows user, but I’m now 100% on GNU/Linux and only touch Windows when I’m attacking Active Directory. There are lots of stories from my journey ... this is just a small part :D

When I’m not coding or hacking, I’m usually watching anime. Pretty boring ... Yes. I know what you think :(


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Contributions

1,512 contributions in the last year

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Timeline

ICEDTEA CTF

2023 - Present

Team member

HeapUnderFlow CTF

2025 - Present

Core member

No Hack No CTF

Challenge Creator & Web Designer

gitgit & Crackme challenges creator, website designer.

TryHackMe

Active Player

Ranked in the top 4% of TryHackMe players

Zero-Day Hunting

Randomly hunting zero-day vulnerabilities

I do it for fun and learning purposes, no public disclosures yet.


Stacks

The Stacks for my development, hacking, and daily use. Cannot list all here, just the main ones :)