rotation

rotation

• Author: Loic Shema
• Location: https://play.picoctf.org/practice/challenge/373
• Tags: Cryptography

Problem

You will find the flag after decrypting this file Download the encrypted flag here.

This challenge came with a hint stating that "[s]ometimes rotation is right" and a file called encrypted.txt (download it here).

Solution

I downloaded the encrypted flag and proceeded to brute force it. I used an app [1] that attacks simple rotation ciphers with the aforementioned brute force method, and it worked out the flag to be picoCTF{r0tat1on_d3crypt3d_4c71f5b0}.

TODO: Write a script to hack the cryptogram.

References

1. https://www.dcode.fr/caesar-cipher