Cybersecurity Portfolio
Martin Rozariyo
Cybersecurity Student | CTF Player | Web Security Enthusiast
Practical security learner focused on web vulnerability research, CTF problem solving, and building reliable security-aware software.
About
Security learning with practical depth
Martin is a 3rd year BTech cybersecurity student building experience through applied web security, competitive CTF work, and foundational red team practice.
Skills
Focused security toolkit
A compact set of practical skills used across CTFs, labs, and security-focused engineering projects.
Web Security
Tools
Programming
Concepts
CTF & Achievements
Competitive security practice
CTFtime integration is cached and kept intentionally simple: ranking, participation context, and a direct profile link.
Ranking
Available on CTFtime
Public profile ranking
Participation
Event history
CTFtime profile activity
Rating
Live profile
Fetched from CTFtime
Projects
Applied security and systems work
Selected projects that connect security concepts with implementation and operational context.
Password management project focused on authenticated encryption, password-derived keys, and secure storage fundamentals.
Writeups
Notes from writeup repositories
Writeups are discovered at build time from CTF_Writeups/2026 and L3m0nCTF2025-Writeups, then rendered from raw GitHub markdown into static pages.
CTF_Writeups/2026/0xfun/Forensics/DTMF/Writeup.md
DTMF - Writeup
DTMF Writeup <img width="522" height="698" alt="image" src="https://github.com/user attachments/assets/4d524f2c 8acd 4d08 ae3c 4242e9bcff20" / Step 1 — Extract DTMF Tones DTMF t...
Read writeupCTF_Writeups/2026/0xfun/Forensics/Ghost/Writeup.md
Ghost - Writeup
Ghost Writeup <img width="521" height="482" alt="image" src="https://github.com/user attachments/assets/8c2d3009 f43c 4a00 a53f 8c45c4ad6d7e" / “The truth is in the static.” A l...
Read writeupCTF_Writeups/2026/0xfun/Forensics/kd>/Writeup.md
kd> - Writeup
kd Writeup <img width="499" height="430" alt="image" src="https://github.com/user attachments/assets/0160bda5 315a 4b94 9ffb 62fba24c7300" / Step 1 Initial Analysis First I unzi...
Read writeupCTF_Writeups/2026/0xfun/Forensics/NothingExpected/Writeup.md
Nothing Expected - Writeup
Nothing Expected Writeup <img width="514" height="450" alt="image" src="https://github.com/user attachments/assets/e9a929c1 2ee1 4d21 b257 c206a6a842eb" / The challenge name “No...
Read writeupCTF_Writeups/2026/0xfun/Forensics/Tesla/writeup.md
Tesla CTF - Writeup
Tesla CTF Writeup Challenge Overview The challenge provided a file named Tesla.sub (originally thought to be data.bin by the user, but identified as Tesla.sub). This file mimics...
Read writeupCTF_Writeups/2026/0xfun/Hardware/DigitalTransition/writeup.md
Digital Transition - Writeup
Digital Transition Writeup Challenge Description We were given a raw signal capture from an HDMI display adapter: signal.bin. The hint mentioned it contained a single digitized...
Read writeup