Developers of Signal app use Google’s domain as a front to hide traffic to their service and to sidestep censorship attempts. Signal is considered by security experts as one of the most secure end-to-end messaging services around the world. Signal’s developers plan future improvements that will allow the app to detect censorship automatically and switch to domain fronting even if the user has a phone number from a country where censorship is not normally present. This is intended to cover those cases where users travel to other countries where the app is blocked.”]