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Martin Rozariyo I

CTF Player & Security Researcher

./About_Me

Your Profile Picture

Hello! I'm Martin Rozariyo, a passionate cybersecurity professional with a knack for breaking things to make them better. My journey into the digital world began with a simple curiosity about how systems work, which quickly evolved into a deep-seated drive to understand and mitigate security vulnerabilities. I thrive on the challenge of dissecting complex systems, uncovering hidden weaknesses, and developing robust defenses.

This portfolio is a terminal into my world, showcasing a collection of my projects, research, and writeups from various CTFs and personal explorations. My goal is to continuously learn, share knowledge, and contribute to a more secure digital future.

Core Skillset

Web Application Pentesting Network Security Reverse Engineering Python Scripting Linux/Unix Systems Threat Analysis Cryptography Forensics

./Authored_Challenges

Original Capture The Flag challenges authored for L3m0nCTF 2025. Click any challenge to read the full writeup directly on this site.

Internal Notation

Cryptography · Enigma-style rotor cipher

L3m0nCTF 2025 Read Writeup →

Rotating Shadows

Cryptography · Custom mechanical cipher

L3m0nCTF 2025 Read Writeup →

Mystery Call

Forensics · Audio · DTMF · XOR

L3m0nCTF 2025 Read Writeup →

Nowhere on the Road

Forensics · FFT · Frequency domain

L3m0nCTF 2025 Read Writeup →

The Cicada Archives

Forensics · Logs · Stego · PCAP

L3m0nCTF 2025 Read Writeup →

Lost Signal

Forensics · Bitplanes · PRNG seed

L3m0nCTF 2025 Read Writeup →

Layers of Trust

Forensics · Email · Crypto chain

L3m0nCTF 2025 Read Writeup →

./Latest_Writeups

🚧 COMING SOON

Authored challenge analyses will be published here.

./Personal_Projects

🚧 COMING SOON

Selected projects will appear here in the future.