*   What sort of ripple effects are you thinking?

Purely editorial within the document which talks about one or more 
DNS-ID/URI-ID in a couple of places.


  *   I agree that, in practice, the use of multiple names has been normalized 
beyond the "SNI workaround" (e.g. the discussions on cross-SNI resumption or 
the ORIGIN frame), so removing that text seems acceptable, but I suspect that 
we'd both be on the same page of wanting to say _something_ about the risks, 
such as cross-protocol attacks. And if we're going to discuss those, would it 
also be appropriate to discuss the concerns about accepting multiple different 
_types_ of identifiers within a message, and the intersection that can play 
with, for example, nameConstraints.

Yes I think we are.


  *   That is, I've seen far too many implementations that will accept (DNS-ID 
|| URI-ID) within a TLS endpoint, but will happily ignore that while a DNS-ID 
will be constrained by DNS nameConstraints, those same nameConstraints won't 
constrain the URI-ID unless URI nameConstraints are included, and notably... 
they aren't required to be included in popular PKIs like the Web PKI.

I didn’t even realize URI nameConstraints were possible.


  *   Happy to suggest text if folks think it's worth tackling during this 
revision, although it seems a separate-but-related attack to the cross-protocol 
attack.

Please do!

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