How to encrypt a communication channel at ~433MHz?

Question

Data transfer

There are two transceivers with FSK modulation. On board have hardware AES128.
Several text commands must be encrypted. The command text is the same. I would like the messages to have a different ciphertext each time.

Answer 1

The command text is the same. I would like the messages to have a different ciphertext each time.

Use a randomized cipher mode, such as CBC, CTR or GCM, which, in addition to confidentiality, if I'm not mistaken, also provides authentication.