Homomorphic encryption

step 1: use AES in CTR mode
step 2: start flipping bits
step 3: decrypt
notice that the bits that you flipped in the ciphertext are the also flipped in the plaintext
Wow, science!

I'm convinced that AES is cracked by the Five Eyes already and they're keeping it secret. It's fishy when you try to use a different cipher and everyone seems brainwashed to scream at you to use AES.