this post was submitted on 23 Jun 2025
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Packet data has headers that can identify where it's coming from and where it's going to. The contents of the packet can be securely encrypted, but destination is not. So long as you know which IPs Signal's servers use (which is public information), it's trivial to know when a device is sending/receiving messages with Signal.
This is also why something like Tor manages to circumvent packet sniffing, it's impossible to know the actual destination because that's part of the encrypted payload that a different node will decrypt and forward.
Wouldn't you have to have some sort of MITM to be able to inspect that traffic?
TOR is what their already-existing tip tool uses.
You mean like your workplace wifi that you're blowing the whistle at?