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to add even more to what’s already been said, even if Signal’s infrastructure was compromised and they could see messages traveling through their servers, each one is encrypted, the keys are rotated with every message (cracking one, which is nearly impossible, doesn’t give you access to previous or future messages), and thanks to Sealed Sender, only the recipient knows who a message came from. There are many other layers that they’ve engineered to ensure they can’t know anything about you, like private contact discovery, using secure enclaves, remote attestation, etc.

Signal is a publicly available app that provides encrypted communications, but it can be hacked.

This is misleading statement that will only confuse people who want to use a secure messenger.

To clear things up with anyone who’s not technically inclined: Anything can be theoretically hacked. Signal has not been hacked and has no history of being compromised.

The Signal “hacks” that linked people’s Signal client to devices that aren’t theirs were sophisticated phishing/spoofing attacks. The equivalent of getting someone to click a malicious link via email because it looked like the real thing.

A reminder that you still need to do your due diligence even when using a secure service. Technology alone cannot completely protect you.