I haven’t immersed myself into the details of the Room 641A scandal, but it does indeed sound awful. I do not approve of the operations of NSA/Five Eyes. But l

I haven’t immersed myself into the details of the Room 641A scandal, but it does indeed sound awful. I do not approve of the operations of NSA/Five Eyes. But let my re-phrase my question like this: Do we have any evidence that NSA can perform MITM on TLS 1.3? Using a federal US CA would be one way, tricking a CA to issue fraudulent leaf certificates would be another, but as established elsewhere in this thread, both those ways are quite noisy. Attacking the endpoint is another way, but once Mallory does that, all bets are off.