AUTHOR: MADSTACKS
We found a brand new type of encryption, can you break the secret code? (Wrap with picoCTF{})
dcebcmebecamcmanaedbacdaanafagapdaaoabaaafdbapdpaaapadanandcafaadbdaapdpandcac
The provided code. new_caesar.py
My strategy for tackling this CTF challenge was to break it down into manageable steps. I focused on solving one challenge at a time. When examining the challenge, I identified two main components that needed to be cracked: b16_encode and shift.
I began by taking a sample of the b16_encode function input and a sample of the encryption output. This helped clarify the challenge and made it evident that my goal was to revert the output of the encryption back to its original form.
Similarly, I applied the same approach to the shift encryption. I analyzed the encryption mechanism and worked on reversing it. Once I had successfully deciphered both b16_encode and shift, I proceeded to the final step.
The one remaining challenge was determining the key used for the encryption. It was not clear which letter had been chosen as the key. To overcome this obstacle, I brute-forced all possible letter combinations until I found the one that resembled the flag.
Please check out my Python script to see how I reversed the encryption. If you find any flaws, please don't hesitate to open an issue.
Thanks for reading.