Kazuma Matsumoto
I focus on offensive security and AI-assisted security research. I take systems apart to understand how they work, then write up what I find so that others can follow the same path without the dead ends.
Most of what I publish begins with a question that has no public answer yet — an undocumented Windows mechanism, an edge case in a protocol, a trust boundary that exists on paper but not in code. Every write-up is honest about what I proved on the VM and what remains hypothesis.
I am still learning as I go, and this blog is my notebook, shared openly.
Interests
- Windows internals
- Linux internals
- Reverse engineering
- AI-assisted security research
- Web application security
Offensive Security for a Brighter Future.
I start by asking why a system behaves the way it does, including where the answer looks obvious. From there I pick whichever step settles the most, and how long it takes is part of that choice.
I use current tools, AI ones in particular, so the same effort goes further. But the unusual idea, the shape of an attack chain, the call on which features are worth having, and the attention to accessibility are mine.
The write-up says what I found and what I did not. If something did not work, it says so.
Disclosure policy
Every vulnerability is disclosed to the affected vendor before it is published here. Each post records the vendor’s response and its position on the finding. Any proof-of-concept code is provided for reproduction and defense — not for use against systems you do not own.