cryptoPromedium

Strange DES

spbctf

Task: DES encryption with hint about '1 in 2^54' probability. Solution: Exploit DES weak key involution property where E(E(m,k),k)=m to decrypt by encrypting again.

$ ls tags/ techniques/
desblock_ciphersymmetricweak_key
des_weak_key_attackinvolution_property
🔒

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