The question in a CTF was this:
They used two hydrogen atoms (H2) from the SHA-256 molecule to encrypt in some form of AES, and the result was as follows:
{mIT+GVt+p0YfgfOltHgqoetTS6h8bRSAScAGKrBE+g8TJfgsjeiX4/tloGU1In9j42l+zlAnI0+hmbgzpOEmKw==}If the key length is short, they may have used that key twice
I could not work it out. How to solve this kind of question?
