On 9/18/13 5:50 PM, "Viktor Dukhovni" <cryptogra...@dukhovni.org> wrote:
>On Wed, Sep 18, 2013 at 08:47:17PM +0000, Viktor Dukhovni wrote: > >> On Wed, Sep 18, 2013 at 08:04:04PM +0100, Ben Laurie wrote: >> >> > > This is only realistic with DANE TLSA (certificate usage 2 or 3), >> > > and thus will start to be realistic for SMTP next year (provided >> > > DNSSEC gets off the ground) with the release of Postfix 2.11, and >> > > with luck also a DANE-capable Exim release. >> > >> > What's wrong with name-constrained intermediates? >> >> X.509 name constraints (critical extensions in general) typically >> don't work. > >And public CAs don't generally sell intermediate CAs with name >constraints. Rather undercuts their business model. The inability to constrain trust anchors doesn't help matters much either. _______________________________________________ The cryptography mailing list cryptography@metzdowd.com http://www.metzdowd.com/mailman/listinfo/cryptography