Kyle Hamilton wrote:
> (Especially if Comodo delegates full Registration Authority capability
> without verification, which seems to be the case -- though they could
> have simply issued a sub-CA certificate.)

Delegating the RA's tasks is still different from issuing a sub-CA cert
since with a delegated RA the CA can look at all issued EE certs and
revoke some of them if needed. A sub-CA typically runs completely on its
own so the CA could only revoke the sub-CA cert and not certain EE certs.

> It occurs to me that there is no facility in Firefox or other Mozilla
> products to provide an explanatory dialog that there's an issue, and
> such a facility would be extremely useful at this point.  Being able
> to print a message to the user like "The Mozilla Foundation has
> identified issues with the trusted root that issued this certificate
> which prevent Firefox from being able to guarantee that this is truly
> the site to which you intended to go.  While it is unlikely that this
> is a widespread problem, and an attack would rely on more technical
> intrusions into the network, the nature of these issues requires that
> you be warned of this circumstance so that you can exercise
> appropriate levels of caution.  The Mozilla Foundation is working with
> the trusted root to resolve these issues." would help a lot.

Either the trust bits are removed or not. Such a dialogue wouldn't help
at all. It's too complicated.

Ciao, Michael.
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