cryptoeasy
Broken Decryptor
hackthebox
Task: AES-CTR encryption with biased OTP (no 0x00 bytes) and broken decrypt oracle. Solution: Statistical byte elimination attack - collect ~2000 samples to identify the one missing byte value at each position, then XOR with keystream recovered from encrypting zeros.
$ ls tags/ techniques/
known_plaintext_attackstatistical_byte_eliminationkeystream_reuse_attack
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