Write-Up.md

My First Encryption

Description

I just learned about xor! Apparently it's super strong, surely it can protect my secret file!

From the description, we can see that the flag.jpeg is encrypted using XOR with a key.
We can determine the key by XORing the encrypted file's header with the header of the original file using CyberChef.
After this, we find the key as:

303030

Next, we can decrypt the flag.jpeg using the key 303030 with CyberChef.

We get the flag as:

TUCTF{kn0wn_pl@1nt3xt_15_dang3r0us}