Signal keeps your messages private in transit. All messages are stored on your phone.
To enable a passphrase on Signal Android
- Open Signal on your Android phone.
- Tap on the Menu or .
- Choose Settings.
- Choose Privacy.
- Enable/Change passphrase
- To Enable: Tap Enable passphrase until it slides and shows a blue color.
- To Change: Choose Change Passphrase.
If you've enabled a passphrase then choose to lock Signal Android
go to Signal > Menu or > Lock
- by auto-lock after an inactivity timeout
go to Signal > Menu or > Settings > Privacy > check on Inactivity timeout passphrase and adjust the Inactivity timeout interval.