The views expressed on this website are my own, influenced or not by my background as a security engineer. And not those of my employers, past or present.

I use this website to create a knowledge base on various topics, and cybersecurity is one of them. Please note that executing the computer instructions presented on this website may produce unexpected behavior on your system, but they are not intended to be.

The contents are written in English and French, you can filter the content by language using the previously mentioned links.

Hello! I'm Vithurshan Selvarajah, a passionate Security Engineer with a strong focus on Free Software and Open Source Security. I hold an MSc in Cyber Security from ESIEE-IT and have dedicated my career to understanding and improving security through ethical hacking, and penetration testing.

I believe that security is not a product but a continuous process—a mindset that drives me to explore, break, and improve systems. My ecosystem is built around minimalist, free, and open-source software, ensuring transparency, control, and efficiency in my workflow. If you're interested in how I configure my environment, check out my ecosystem and dotfiles.

I practice Capture The Flag (CTF) on platforms like Root-Me and HackTheBox, where I continuously challenge myself to solve security puzzles, reverse-engineer software, and exploit vulnerabilities in controlled environments.

Favourite Quotes:

• Life starts when you leave your comfort zone.
• Security is not a product, it's a process.

The best way to contact me is by mail — vselvarajah@atomicl.net . I also have a presence on LinkedIn and other platforms, though I’m not very active there.

I host my own mail server — if you're interested, feel free to check out my mail server installation guide.