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Let's Encrypt gets automation

Anonymous Coward
Anonymous Coward

D-H is also useless against a MITM because Mallory can just bridge two separate connections together and pretend to be the opposite connection each way. As for seeing if Bob is really Bob, that goes to the intractable First Contact Problem. Because Alice has no frame of reference, she has no true way to know Bob is really Bob (not even in a face-to-face encounter), and you can't rely on a Trent for the same reason (Is Trent really Trent, ad infinitum?) At some point, you're going to have to choose: take the plunge or get off the Net, because what you're arguing is basically that.

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