> They don't need to. You identify yourself within the app with your login. By that logic even whatsapp/facebook don't need anything apart from login. So why d

> They don't need to. You identify yourself within the app with your login. By that logic even whatsapp/facebook don't need anything apart from login. So why do they collect all the other stuff? Signal is making an effort to make do with the minimum amount of data. > While iMessage is vulnerable to (certain) MiTM attacks Apple doesn't need to MITM Imessage. They own the app, service, and devices on both sides. That's why it's silly to compare it with whatsapp/facebook.