If you use AES, you must have the same key and IV to decrypt data. You
shouldn't look for any option to make your key or IV predictable. That is,
if you can easily re-generate it, guess what?..
You probably want to post what you trying to achieve. Seems
like AES may not be the right choice. You may need to look at
public-private key cryptography, where one key encrypts, the other
decrypts. You may also want to use a holistic solution that includes