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
482 B
482 B
title, event, challenge, category, points, difficulty, flag
| title | event | challenge | category | points | difficulty | flag |
|---|---|---|---|---|---|---|
| Say Cheese — EXIF Metadata | GEMASTIK 2026 Warmup | Say Cheese | forensics | 500 | easy | GEMASTIK19{h1dd3n_1n_m3tadata_exif} |
Say Cheese (500 pts) — Steganografi / Metadata
File: photo.jpg
Flag disimpan di metadata EXIF foto. Cek dengan exiftool / strings:
strings photo.jpg | grep GEMASTIK
# GEMASTIK19{h1dd3n_1n_m3tadata_exif}
Flag
GEMASTIK19{h1dd3n_1n_m3tadata_exif}