Hello, I'm
MSc Cybersecurity Graduate
I'm a Master's graduate in Cybersecurity, specialized in web and network security. I like figuring out how an application or a network really works, and where things can go wrong.
I graduated with a Master's in Cybersecurity from the University of Padua in 2026, after a bachelor's in Computer Engineering at the same university. I also spent a semester in Helsinki on Erasmus.
Web and network security is what I spend most of my time on. For my thesis I built a tool that finds JWT tokens in web applications and tests them against known attacks. Since 2023 I've been playing CTFs with pwnlentoni, and for six months I taught web security to students in the CyberChallenge program.
University of Padua · CyberChallenge project ↗
Sync Lab S.r.l ↗ · Padua
A tool I built for my MSc thesis using Playwright. It crawls a web app to find JWT tokens, then runs a set of attacks against them (like key and algorithm confusion) and scores how vulnerable each one is.
View project →An international Capture The Flag competition run by my team, pwnlentoni. I wrote challenges for it, built the exploitable scenarios, and wrote the official solutions and solve scripts.
View project →Italy's national cybersecurity training program for students. I took the course at the University of Padua, placed 4th in the local competition, and made the UniPD team for the national finals.
Learn more →University of Padua · Italy
Grade 110/110
A two-year master's taught in English, about designing and evaluating secure systems: cryptography, network and information security, machine learning, and privacy.
View course ↗ View diploma ↗University of Helsinki · Finland
An exchange semester in Finland's computer science department, with courses on deep learning, web development, and web security.
View course ↗University of Padua · Italy
Grade 93/110
General engineering across computer science, electronics, networks, and automation, with a solid base in programming, computer architecture, and information systems.
View course ↗ View diploma ↗ITI Francesco Severi · Padua, Italy
Grade 88/100
Technical secondary diploma in IT and telecommunications, covering software development, databases, networks, and systems, with lab work on Windows and Linux.
View school ↗I was an active member of AGESCI, Italy's Catholic scouting association, from 2009 to 2021: community service, outdoor trips, and team projects. I still help out today by cooking for the scouts at their camps.
I volunteered for four years in two areas: peer education for young people on topics like sexual health and the Red Cross's humanitarian values, and psychosocial support, with training on how to help vulnerable people.
CTFs are where I practice web and network security. I mostly play web, misc, AI, and OSINT challenges. In attack-defense games I also keep an eye on the network traffic reaching our services. It's always a team effort, and always against the clock.
I'm open to junior roles in web and network security, collaborations, or just talking about a security problem. Feel free to reach out.
leonardocosta330@protonmail.com