Post #1598554

I don't think there is any E2EE between a JMP number and an iPhone. Cheogram offers E2EE, but I think it is just between Cheogram clients. Although I have never used iMessage (or iOS), I believe it is E2EE between iMessage clients, so if all your family members are on iMessage, then may be staying on that will offer you better security compared to Cheogram. That said, I know GrapheneOS has been working on RCS (although I do not use it). I have seen some of these RCS updates on their changelog, and some users report that it works too (see https://github.com/GrapheneOS/os-issue-tracker/issues/6173 for example). So, may be you can ask your family members to turn RCS on, and use it to securely communicate between GrapheneOS and iOS?!