49
Why do criminals use their own encrypted messaging platforms, instead of using any of the recommended apps?
(www.europol.europa.eu)
Icon base by Lorc under CC BY 3.0 with modifications to add a gradient
That's correct, you still need a phone number for sign up. between contacts you can use usernames.
So Signal has your phone number, your contacts only have it if you use your number instead ofgiving them a username.