cryptoProhard

Ghost

codegate

Task: GOST Davies-Meyer hash with secret S-boxes, 128 round_core queries, find collision. Solution: recover S-boxes via oracle, apply 3-round local collision (Dunkelman-Keller-Weizman CRYPTO 2023) with fixed-point construction.

gost feistel davies_meyer related_key_differential local_collision sbox_recovery fixed_point

sbox_recovery_via_oracle3_round_local_collisionfixed_point_constructiondavies_meyer_collision

$ ls tags/ techniques/

gost feistel davies_meyer related_key_differential local_collision sbox_recovery fixed_point

sbox_recovery_via_oracle3_round_local_collisionfixed_point_constructiondavies_meyer_collision

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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