eMudhra's certificate keys got compromised in October 2026 - and one of them was literally the number 4. I take what I learned writing about TLS and Diffie-Hellman and use it to reproduce the weak key myself, step by step.
How I built Server Monitor - a self-hosted tool that watches a group of Linux servers over plain SSH, with nothing installed on them and no dependency on outside services - with AI-assisted development.
A step-by-step mathematical deep-dive into how Diffie-Hellman key exchange works - from simple paint mixing analogies to the discrete logarithm problem that makes it unbreakable.