Re: [tor-dev] Proposal 190: Password-based Bridge Client Authorization

On Tue, Jan 17, 2012 at 1:28 PM, Robert Ransom rransom.8774@gmail.com wrote:

With that hack on top of the v3 protocol, any client able to detect that a bridge is not being MITMed can impersonate the bridge through the TLS handshake, until after the (honest, victim) client speaks the Tor protocol at the fake bridge.

Seems mostly harmless; the only point of a shared secret there is to keep scanning from working. Anybody who tries the above attack already know that the bridge is there; all they learn is that the client knew too, which they probably could have figured out as an eavesdropper.