# CSAW CTF Qualification Round 2019 : DES 2 bites
**category** : crypto
**points** : 200
**solves** : 106
## write-up
The hint on the challenge said that this challenge use weak keys in DES
Just brute force every weak keys in DES ([you can found all weak keys here](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-67r1.pdf))
flag: `flag{~tak3_0n3_N!bbI3_@t_@_t!m3~}`
# other write-ups and resources