asepharyana
7a6e717c28
- Deleted all previous dummy docs (defcon-quals-2024, infra/cloudflare-525, debugging/websocket-timeout, template, docs/*, notes/*, research/*) - Added 14 Gemastik warmup writeups covering encoding, stego, web, pwn, crypto - ch13: RSA small factors; ch14: RSA special integers via paper-search (GCD with paper appendix primes) - All flags recovered and documented with solution methods
507 B
507 B
title, event, challenge, category, points, difficulty, flag
| title | event | challenge | category | points | difficulty | flag |
|---|---|---|---|---|---|---|
| Behind the Picture — PNG Strings | GEMASTIK 2026 Warmup | Behind the Picture | forensics | 500 | easy | GEMASTIK19{c4t_g4mbar_ada_flag} |
Behind the Picture (500 pts) — Steganografi / PNG
File: kucing.png (cat image)
Flag disisipkan sebagai string di dalam file PNG (bisa dilihat dengan strings):
strings kucing.png | grep GEMASTIK
# GEMASTIK19{c4t_g4mbar_ada_flag}
Flag
GEMASTIK19{c4t_g4mbar_ada_flag}