Homomorphic encryption is still in early development in the academic community. I doubt Facebook is going to boost development majorly. It would ultimately mean breaking the Signal protocol that Signal implemented/audited for them.
Thankfully for now, they can’t learn much except the length of our data, and deduce context of our conversations with metadata.
The easiest option for secure messaging is obviously Signal. Although there are less convenient options that are considered more secure, such as Briar.
Homomorphic encryption is still in early development in the academic community. I doubt Facebook is going to boost development majorly. It would ultimately mean breaking the Signal protocol that Signal implemented/audited for them.
Thankfully for now, they can’t learn much except the length of our data, and deduce context of our conversations with metadata.