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Subject: Re: [xri] Summary on trust/KeyInfo issues

On Jul 23, 2009, at 2:39 AM, Nat Sakimura wrote:
> xrd/KeyDescriptor: Wrapper element for ds:KeyInfo for the Subject.

just to clarify, what is the use-case for an XRD-level KeyInfo?  I  
understand that there may be application specific use cases like XDI  
Message which Markus mentioned, but is there any XRD use-case for  
this?  As far as I know, the only KeyInfo elements that matter for XRD  
are the ones under ds:Signature and Link.

Stephen Weber recently blogged about doing PGP key discovery over  
HTTP[0].  One of his proposed methods was advertising the key as a  
linked resource in an XRD.  While I'm not sure that I agree with using  
a rel value of "me", it does seem that the certificate for a subject  
can be viewed as simply a related resource.  That still wouldn't  
preclude it from being embedded directly into the XRD document itself.

[0]: https://singpolyma.net/2009/06/discovering-openpgp-keys-over-http/

I don't want to spend too much time discussing the best way of putting  
a Subject's key into an XRD unless we really need to... that can be a  
discussion for later.  I just want to clarify if this is something  
that really needs to be defined in XRD.


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