Turned out the encryption we rolled in the previous challenge was not secure, so we decided to change up the encryption again. Hopefully, this one is a little more secure.

aes.py da5fde5b09d63b664a5f3cdf2749eccc 5.3K
encrypted 10771534e19027725cdc69496d988440 5.5K

This problem is from DMOJ Capture The Flag '20. For more details, please view the contest page.