Hi, I’m Matteo [0xless] Cosentino. I’m a penetration tester by day and a security researcher by night. I see hacking as a tool to learn new things and I’ve always been fascinated by breaking stuff.

I often go too deep into technology related “rabbit holes”, this blog was born so I can share my experiences and get motivated to finish what I start. lessonsec.com is a diary of my projects, ideas and experiences on security.