picoCTF 2023 – rotation
28 March 2023 – Written by Valentin Huber – in crypto, ctf, cyberchef, and rot13
You will find the flag after decrypting this file Download the encrypted flag here.
The challenge title indicates some form of rotation cipher, so I put the encoded text into cyberchef and used the
ROT13 Brute Force module to rotate the text. A quick text search on the output showed that the encoding is a rotation by 18 chars and the flag is