> > That's true, the TextSecure server always knows who the sender and > recipient are, regardless. Adding Tor to the sender side would only deny > the server knowledge of the sender's IP address. > Right, but with the group signature scheme Pond uses, the server can also be denied knowledge of which of a users contacts is sending the message. This seems like a powerful privacy upgrade.
> The only thing preventing this from being more than a theoretical problem > is the lack of mainstream adoption, and thus profit motive. > WhatsApp has the same design and no spam, as does regular SMS. It's pretty simple to just ban users who spam, in the centralised context.
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