Juergen Schmidt schrieb:

> - As far as I know not all CAs support OCSP and a lot of older
> certificates provide no OCSP-URI. They will stay attackable without
> blacklist. But I have no statistics about that yet.

A quick check shows that from 225 weak certificates  we collected in the
wild only 43 had an OCSP URI. This is less than 20%.

Note: we counted only explicit "OCSP - URI" declarations in the extended
section. If there are other ways of declaring a valid OCSP responder, we
did not count them. For example some certificates have a "Netscape
Revocation Url". I don't know what this means.

bye, ju

--
Juergen Schmidt       Chefredakteur  heise Security     www.heisec.de
Heise Zeitschriften Verlag,    Helstorferstr. 7,       D-30625 Hannover
Tel. +49 511 5352 300      FAX +49 511 5352 417       EMail [EMAIL PROTECTED]
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