WebID-ISSUE-32 (nodns_webid): URIs with IP addresses and security [WebID Spec]

WebID-ISSUE-32 (nodns_webid): URIs with IP addresses and security [WebID Spec]

http://www.w3.org/2005/Incubator/webid/track/issues/32

Raised by: Henry Story
On product: WebID Spec

A URL need not contain a domain name, and so need not be tied to DNS. For example:

   http://29.45.62.12/peter#me
or
    https://29.45.62.12/peter#me

What are the advantages?
  - Does it really bypass DNS?  Does anyone ever get an IP address without a domain name? 

But how would security for such URLs work? 

If we think of pure https URLs the following questions arise

  - Do CAs certify IP addresses?
  - The advantage of placing public keys in DNSSEC with DANE would be lost

So would this require a completely new way of securing the IP address?