CTF Team

HowToBeASepuh

A competitive CTF team from Institut Teknologi Bandung — playing crypto, pwn, reverse engineering, web, forensics, and misc. Below are the competitions we've placed in, each with full English write-ups.

About

HowToBeASepuh is a Capture-The-Flag team of three ITB students. We compete across the full CTF stack and publish detailed, reproducible write-ups for the challenges we solve. Every competition below links to its own write-up site.

Competitions

TeknoCom 2025 CTF

Universitas Teknokrat Indonesia · International

3rd Place

The Cyber Security (CTF) branch of the TeknoCom International Competition 2025, a fully online international event. We finished 3rd place.

Write-ups & source →

GEMASTIK XVIII CTF 2025

Indonesia's Ministry Higher Education, Science, and Technology · National

Quals: Top 20 · Finals: 12th Place

Indonesia's national ICT competition for university students. We reached the finals as Top 20 in qualifications, then placed 12th in the final round.

GEMASTIK 18 CTF final-round scoreboard Write-ups & source →

Pragemastik ITB CTF 2025

Institut Teknologi Bandung · University

Top 10 · ITB delegation

ITB's internal selection CTF for the national GEMASTIK delegation. We finished Top 10 and became one of the ten teams representing the institute.

Write-ups & source →

Members