"It is not true that an #archivingsolution properly preserves the security offered by an end-to-end encrypted messaging app like #Signal. Ordinarily, only someone sending a Signal message and their intended recipient will be able to read the contents of the message. #TeleMessage essentially adds a #3rdparty to that conversation by sending copies of those messages somewhere else for storage. If not stored securely, those copies could in turn be susceptible to monitoring…"

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