**Full write-up:** [https://www.sebven.com/ctf/2021/08/29/WORMCON0x012021-Exclusive.html](https://www.sebven.com/ctf/2021/08/29/WORMCON0x012021-Exclusive.html)
Cryptography – 100 pts (25 solves) – Chall author: BUILDYOURCTF
A home-rolled XOR cipher with a stunning key space of 1 byte, yes a total of 256 different keys. That just asks to be brute-forced and so that is exactly what we will do. Try out all the keys and get our flag.