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
654 B
654 B
title, event, challenge, category, points, difficulty, flag
| title | event | challenge | category | points | difficulty | flag |
|---|---|---|---|---|---|---|
| Julius — ROT13 Caesar Cipher | GEMASTIK 2026 Warmup | Julius | crypto | 500 | easy | GEMASTIK19{caesar_r0t_th1rt33n_klasik} |
Julius (500 pts) — Caesar / ROT13
File: chall.txt → TRZNFGVX19{pnrfne_e0g_gu1eg33a_xynfvx}
Caesar cipher dengan pergeseran paling populer di internet = ROT13 (geser 13).
TRZNFGVX19 → GEMASTIK19, dst.
import codecs
s = "TRZNFGVX19{pnrfne_e0g_gu1eg33a_xynfvx}"
flag = codecs.encode(s, "rot_13")
print(f"Flag: {flag}")
# Output: GEMASTIK19{caesar_r0t_th1rt33n_klasik}
Flag
GEMASTIK19{caesar_r0t_th1rt33n_klasik}