Yes, end-to-end encryption is possible. It just needs support in clients, as well as a common protocol if you want it to work between different clients. Mastod

Yes, end-to-end encryption is possible. It just needs support in clients, as well as a common protocol if you want it to work between different clients. Mastodon has actually done some work towards that but I don't think it's useable yet, see https://github.com/mastodon/mastodon/pull/13820 https://github.com/mastodon/mastodon/pull/13820