rob.stradling at comodo.com
Wed Nov 11 14:26:18 UTC 2015
On 11/11/15 14:02, B.R. wrote:
> It is sad Chrome kind of forces website owners to have Certificate
> Transparency available while the whole things is still categorized as
> 'Experimental' by the IETF to this day:
> ... but that is another debate. If you wanna serve CT certificates from
> a non-CT-compliant CA, you will need to serve it through as TLS
> extension, ie using a server module.
> In the end, it sounds logical that CA implement this mechanism on their
> side, through OCSP.
Indeed it does (and I'm very glad I pushed for this feature to be
included in RFC6962 :-) ).
If you have a cert from Comodo, we can embed SCTs in OCSP Responses for
you today. Just ask. :-)
(IIRC, DigiCert can do this too. I don't know about any other CAs).
> For now, this RFC future is uncertain and the technical oddities this
> mechanism oddities it implies (double issuance
> for example) might make CAs relunctant to rush, and it is perfectly
Google have consistently said that they intend to require CT for all (EV
and non-EV) TLS server certificates eventually.
Given that Google are "going to require that as of June 1st, 2016, all
certificates issued by Symantec itself will be required to support
Certificate Transparency" , it seems that "eventually" might not be
that far away.
BTW, note that over at the IETF we're working on the next version of CT .
> If you support Chrome's vision and Google's wish to force the way of
> this RFC, go for a compliant CA or use a custom module.
> *B. R.*
> On Wed, Nov 11, 2015 at 12:11 PM, Rob Stradling
> <rob.stradling at comodo.com <mailto:rob.stradling at comodo.com>> wrote:
> On 11/11/15 11:03, locojohn wrote:
> Joó Ádám Wrote:
> The TLS extension is the only method to implement Certificate
> Transparency without the assistance of the CA, and starting with
> January 1 2015 Chrome refuses to display the green bar for EV
> certificates without Certificate Transparency.
> StartSSL is one CA that currently does not support other
> which means a lot of sites suffers from this.
> Interesting, we have installed multi-domain EV certificates from
> for our company and we use Nginx, and EV green bar works in all
> modern and
> even not so modern browsers:
> In Chrome 46, I see "https:" in green but I don't see the "EV green
> bar" that shows the Subject Organization Name. That's because...
> I presume Certificate Transparency is not required then?
> ...CT _is_ required if you want to see the EV green bar in recent
> versions of Chrome.
> Best regards,
> Rob Stradling
> Senior Research & Development Scientist
> COMODO - Creating Trust Online
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