Earlier quoted context omitted.
for signal users this means the messages of course do exist on your phone, which will be the first thing these agencies seek to abscond with once youre detained as its infinitely more crackable in their hands. as a casual reminder: The fifth amendment protects your speech, not your biometrics. do not use face or fingerprint to secure your phone. use a strong passphrase, and if in doubt, power down the phone (android)…
Signal recently added 'disappearing messages' which lets you specify how long a chat you initiate remains before being deleted.
Almost _all_ my Signal chats are on 1 week or 1 day disappearing settings. It helps to remind everyone to grab useful info out of the chat (for example, stick dinner plan times/dates/locations into a calendar) rather than hoping everybody on the chat remembers to delete messages intended to be ephemeral.
The "$person set disappearing messages to 5 minutes" has become shorthand for "juicy tidbit that's not to be repeated" amongst quite a few of my circl3es of friends. Even in face to face discussion, someone will occasionally say something like "bigiain has set disappearing messages to five minutes" as a joke/gag way of saying what used to be expressed as "Don't tell anyone, but..."
(I just looked it up, https://signal.org/blog/disappearing-messages/ from Oct 2016.)