> It’s also worth noting that end-to-end encryption is necessarily broken as messages to (and from) WhatsApp, Signal and Telegram pass across the bridge(s). The bridge(s) operates in Element’s trusted EMS environment, with no content scanning or datamining, but currently bridged conversations are not stored end-to-end encrypted in Matrix (they will be in the future). As a Signal user, I kind of don't want this to tak…
So you should have an encrypted message that you hand to Signal. Signal encrypts it again and hands it to the bridge. Eventually, whether at the bridge or at the other end or wherever, something decrypts the Signal message. Then the person you are communicating with applies the final decryption outside of Signal, Matrix, or whatever.
If this sounds terribly inconvenient to you, perhaps privacy is not as important as you claim. Security and convenience are almost always in conflict.