On 10 September 2013 22:04, Joe Abley <jab...@hopcount.ca> wrote:

> Suppose Mallory has access to the private keys of CAs which are in "the"
> browser list or otherwise widely-trusted.
> An on-path attack between Alice and Bob would allow Mallory to terminate
> Alice's TLS connection, presenting an opportunistically-generated
> server-side certificate with signatures that allow it to be trusted by
> Alice without pop-ups and warnings. Instantiating a corresponding session
> with Bob and ALGing the plaintext through with interception is then
> straightforward.

CT makes this impossible to do undetected, of course.
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