CTF write-ups
Capture-the-flag challenge write-ups: crypto, reversing, web and forensics puzzles, explained step by step.
Topics
The archive grouped by subject.
Reverse engineering
Notes on taking binaries apart: packers, anti-debugging tricks, crack-mes and malware analysis.
Web security
Web application flaws and browser behaviour: XSS, upload bypasses, logic bugs and protocol issues.
Kernel and exploits
Kernel bugs, privilege escalation and the hardening work that made exploitation harder.
Hardware security
Device and board-level security: debug interfaces, connectors, firmware and IoT hardening.
Papers
Longer papers and research notes, many first written in Chinese, now summarised and refreshed.