Yes, I am arguing for 'require' so I'll restate: "Everybody is required to 
constrain in order to make the Internet safer for everyone. CA's may change 
their constraints at a later date, but you have to tell us."

As I stated previously, the security benefit ‎is not to the CA itself but to 
everyone else on the Internet--regular, everyday users. When a CA system 
becomes compromised, the bad actor will say: "Cool! Now, how much damage can I 
inflict?" We should have a way to impose boundaries that intend to limit that 
damage.

My whole viewpoint regarding name constraints is that it is a solvable problem. 
It's not a easy problem to solve, but it can be done.  This whole debate, 
though, is starting to get tedious ‎because while I can make any number of 
suggestions (many of which would be controversial!) what's missing here is how 
much appetite Mozilla has to change the status quo. 

So, how much work does Mozilla feel like doing?

  Original Message  
From: Gervase Markham
Sent: Thursday, March 26, 2015 5:07 AM‎

On 26/03/15 03:59, Peter Kurrasch wrote:
> Perhaps I chose my words poorly because my intention actually was to
> avoid having to pass judgment at all. Instead of saying to a CA "we
> don't trust you enough, please constrain" I was hoping for something
> along the lines of "everybody is asked to constrain to make the
> internet safer for everyone".

But you say "asked" - and that's the entire difference between my
position and yours. I am saying "'ask' is OK; 'require' is not". You are
arguing for 'require'.

> In terms of who gets to issue for .com, I wouldn't impose a limit of
> who can do it, just that you have to tell us you're doing it. If a
> intermediate were to be constrained to .com, .net, and .org and
> nothing else, I would be fine with that. That would actually be quite
> an accomplishment if we could get every CA to just agree to that
> much.

It depends on the configuration of the CA's systems, but I'm not
convinced that a CA significantly improves its security posture by
having 10 intermediates which split the entire DNS space up into 10
pieces, rather than one. Those certs may well all be tied to the same
issuing system.

Also, it means they would have to cut a new intermediate every month, at
the moment, if they wanted to serve the new gTLD market.

Gerv
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