Tories switch to messaging app Signal after WhatsApp leaks
theguardian.com
theguardian.com
I'm sure Killock's tongue was firmly in his cheek when he said this, but of course Patel is unlikely to experience either emotion. A lot of the UK political establishment have an attitude of "one rule for us, another for the hoi polloi". Patel is certainly not an exception.
From https://support.signal.org/hc/en-us/articles/360007320771-Se... :
> This is not for situations where your contact is your adversary — after all, if someone who receives a disappearing message really wants a record of it, they can always use another camera to take a photo of the screen before the message disappears.
In other words, the way they describe it, use cases for disappearing messages would be limited to ones where you trust your conversation partner(s). Basically it is a cooperative data retention feature.
This depends on you trusting the other conversation party - but it would in any case, as there are so many ways to save a message that’s on your device. Even if you assume the most draconian, user-hostile device imaginable, all it takes is a camera pointed at the screen to defeat. It’s just not worth it.
Open source means the source code is available to read.
Disappearing messages means you can delete things from your device and ask the other side to delete them as well.
If they do, it's "just" that plus jailbreak detection.
One of the reasons Signal use deniable encryption is because if a message that supposedly comes from you is sitting in someone else's chat, they have no way of proving that you sent it vs them putting it there.