Articles about tech, tools, and life.
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.
Cryptography 101: From Caesar to HTTPS
How Caesar encrypted orders 2000 years ago, and how HTTPS uses the same ideas today — the core concepts of cryptography, explained.
The Security Toolkit: Your First Gear, From Zero
A beginner's equipment list for information security: intercepting, analyzing, reversing, cracking — what each tool does and how to start.
From Zero to Hero: The Complete Security Learning Map
A six-stage learning map for information security: what to learn at each step and what counts as passing — from absolute beginner to independent researcher.
Markdown Writing Guide
A sample post demonstrating every formatting style this site supports: headings, lists, tables, code blocks, quotes, and more.