Signal is designed to never collect or store any sensitive information. Signal messages and calls cannot be accessed by us or other third parties because they are always end-to-end encrypted, private, and secure.
Here's how to determine if your communication is private:
Android
In addition to supporting end-to-end encrypted messages and calls with other Signal users, Signal Android can be configured as your default SMS/MMS app. In this case, you may want to know when your communication is private (Signal message) or insecure (SMS/MMS).
When you are securely communicating with another Signal user, you will see the following indicators:
- The call icon will have a lock
- The area where you type a message will say "Signal message".
- The send icon will be blue
after you type a message. - Signal voice and video calls have a distinct look, and the words "Signal Call" also appear on the screen.
iOS
All Signal communication on Signal iOS is private. There's nothing extra you need to do or look for.
Desktop
All Signal messaging on Signal Desktop is private. There's nothing extra you need to do or look for.