They sound staggeringly incompetent. And anyone who bought their software without any investigation into its quality also sounds staggeringly incompetent. Apparently there’s a lot of it going around.

https://archive.is/5WcRT

Here’s a link to the original article (from the same author) on the platform you should actually subscribe to.

https://www.404media.co/the-signal-clone-the-trump-admin-uses-was-hacked/

Good that the most powerful people in the world use it then

works in almost exactly the same way as Signal, except that it also archives copies of all the messages passing through it, shattering all of its security guarantees.

Pretty sure Signal does that as well, which is not a security issue.