Crypto 6 - Writeup

Crypto 6 - Valentine CTF 2020

The challenge gives you a file, when you open it you see this weird text.


As we have said before, you need to be familiar with the most popular ciphers/ encoding methods. This text seems like ‘Malbolge’, which is an esoteric programming language used for encoding.
Let’s try out a Malbolge interpreter and see what will the program output.

As we can see, the program outputs the flag.