Hi, I'm koki。
A sophomore majoring in Information Security Application Technology at Shantou Polytechnic. This is my corner of the internet: study notes, CTF challenges, car knowledge, and the good things I've collected along the way.
Explore
From tech notes to car knowledge — a little bit of everything.
Blog
Articles about tech, tools, and life.
Projects
Things I've built: coursework, competition entries, and side projects.
Security Zone
Home turf for an Information Security major: a learning path, practice platforms, and fun crypto tools.
Car Zone
Notes from a car enthusiast: engines, gearboxes, drivetrains, new energy — everything that makes a car go, and go well.
Physics Zone
Physics × engineering: how electric motors turn electricity into rotation — brushed, brushless, brands, and interactive animations.
Learning Roadmap
A step-by-step path for learning to code from zero: what to learn, with what resources, and how long it takes.
Learning Resources
Curated resources for learning to code from scratch: tutorials, videos, books and practice platforms — mostly free and beginner-friendly.
Bookshelf
Books I'm reading, have read, or want to read — with short notes.
Mini CTF Challenge
3 flags are hidden somewhere on this site. Find them and enter them below.
Recent posts
View all →SQL Injection 101: It Starts With One Quote
Your first web security lesson: what SQL injection is, how ' OR '1'='1 bypasses authentication, and why parameterized queries stop it.
Hello, World
The first post on Koki's blog — how this site was built and what to expect here.
CTF Is Not Hacking — It's Puzzle-Solving
The best way into information security: what CTF is, its categories, and how to start from absolute zero.