David Benjamin <david...@chromium.org> writes:

>[*] From the conclusion of the paper: "The most straightforward mitigation
>against the attack is to remove support for TLS-DH(E) entirely, as most major
>client implementations have already stopped supporting them"

Just as you need to automatically add "in mice" to the end of any announcement
of a new medical result, so you also need to add "on the web" to the end of
any pronouncement about TLS.  This only applies to the special bubble of the
web.  For other situations, the effect of banning DHE will be to force
everyone to move to RSA.  I've already seen this in payments processing
applications, instead of using the secure-unless-you-implement-it-really-badly
DHE they use the almost-impossible-to-do-securely RSA, because someone has
told them not to use DHE.

So a blanket ban of DHE will lead to a net loss in security.

Peter.


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