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A comment on Show HN: Beeper – All Your Chats in One App. Parent comment

Re:Show HN: Beeper – All Your Chats in One App by rkangel on Thursday January 21, 2021 @08:28AM (#25858568)
Nope - you have to encrypt them to send them to WhatsApp. Why could you not encrypt them in the client and then send that encrypted message over the bridge, preserving E2E?
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Re:Show HN: Beeper – All Your Chats in One App by TheCraiggers on Thursday January 21, 2021 @01:08PM (#25861985)
Because that's not how this works. The bridge has to have the unencrypted text, because it's the bridge that is communicating with WhatsApp/Signal/IRC/whatever. The client isn't the bridge, it's not communicating directly with WhatsApp, it's just communicating with a Matrix Bridge (over an encrypted channel) to a Synapse server you don't control.
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Re:Show HN: Beeper – All Your Chats in One App by _-___________-_ on Thursday January 21, 2021 @10:47PM (#25868094)
You'd need WhatsApp's collaboration for this, which I'm going to go out on a limb and suggest that the bridge operator doesn't have.

There are two encrypted channels: client<->bridge, and bridge<->WhatsApp. The bridge can read the decrypted text, and the comment I replied to is a lie.

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