asepharyana
0de2458955
- Deleted all 14 dummy docs from DB + filesystem - Created 14 Gemastik warmup writeups + index via create_document API (DB-first) - ch1-ch12: encoding/stego/web/pwn basics - ch13: RSA small factors - ch14: RSA special integers via paper-search (GCD with paper appendix primes) - All 15 docs indexed and live at wiki.asepharyana.my.id
784 B
784 B
title, type, section, status, author, tags, path, created_at, updated_at, event, challenge, category, points, difficulty, flag
| title | type | section | status | author | tags | path | created_at | updated_at | event | challenge | category | points | difficulty | flag | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Behind the Picture — PNG Strings | writeup | writeups | published | asep |
|
writeups/gemastik-2026-warmup/ch11-behind-the-picture.md | 2026-08-21T07:25:45.672Z | 2026-08-21T07:25:45.672Z | GEMASTIK 2026 Warmup | Behind the Picture — PNG Strings | 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}