Journalists use #Signal to talk to sources and share tips safely. The app helps protect privacy, but #journalists are often targets. To stay safe, they should secure their Signal account. This article explains how. The tips are also useful for ordinary users.

https://freedom.press/digisec/blog/locking-down-signal/

Locking down Signal

Also available in Spanish.

Freedom of the Press
@librarianbe ..or they could instead use a messenger that is decentralized, really open source and doesn't require a phone number.
@cos
That sounds really good!
Which one would you reccomend?
@librarianbe
@ami @librarianbe Element/Matrix. There are other options such as XMPP and p2p messengers, but Matrix seems to be most widely adopted.
@cos
Ok, I've heard some pretty terrible things about the state of encryption in matrix. But maybe it's gotten better 🤔
A locally hosted XMPP does sound like a doable idea though.
@librarianbe

@ami @librarianbe you need to verify your new logins/devices with qr code to get private keys transferred to them. That's a security feature. Not doing so causes unable to decrypt messages.

Future versions should be even better:

https://matrix.org/blog/2024/10/29/matrix-2.0-is-here/#4-invisible-encryption

No strong opinion on XMPP, I don't have any friends or communities using it. Everyone is on Matrix and/or messengers bridged to it.

Matrix 2.0 Is Here!

Matrix, the open protocol for secure decentralised communications