cryptoProhard
Отличная кофемашина (Excellent Coffee Machine)
duckerz
Task: Buggy AES-GCM implementation with shared GLOBAL_H across tenants. Solution: Exploit GHASH linearity over GF(2) to recover SECRET_VICTIM via matrix solving, then forge valid tag to decrypt flag.
$ ls tags/ techniques/
gcm_tag_forgerygf2_matrix_solveghash_linearity_exploit
🔒
Permission denied (requires tier.pro)
Sign in to access full writeups
Sign in with GitHub to continue. No email required.
$sign in$ grep --similar
Similar writeups
- [crypto][Pro]Гран-при (Grand Prix)— duckerz
- [crypto][Pro]MACdonalds— hackerlab
- [forensics][free]Lavender— alfactf
- [crypto][Pro]Tutor in the middle— duckerz
- [forensics][Pro]BadUSB— duckerz