W3C home > Mailing lists > Public > public-xg-webid@w3.org > October 2012

Re: WEbID Todos

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Fri, 05 Oct 2012 17:15:39 -0400
Message-ID: <506F4DFB.2010607@openlinksw.com>
To: public-xg-webid@w3.org
On 10/5/12 3:42 PM, Henry Story wrote:
> A good place to start would be to look at Harry Halpin's condensed FUD.
>
> http://lists.w3.org/Archives/Public/public-identity/2012Oct/0036.html

So nail this point since Harry's heavily vested in it, utterly 
incorrectly I might add re. WebID.

<<
4.  Unlinkability

    Definition:  Unlinkability of two or more Items Of Interest (e.g.,
       subjects, messages, actions, ...) from an attacker's perspective
       means that within a particular set of information, the attacker
       cannot distinguish whether these IOIs are related or not (with a
       high enough degree of probability to be useful).

 >>

The above is also known as Entropy. Its the biggest challenge to privacy 
and everyone really needs to wake up and accept the existence of a 
thriving underground market for profile data nuggets. Thus, advocating 
any system that ships around mailto: scheme URIs in a certs. SAN is an 
utter contraction in terms. Our email addresses are the ultimate 
inadvertent "super keys" in today's entropy-friendly personal data 
underground market :-(

Thanks to logic, you can encumber the mailto: scheme URI "super key" by 
nesting in an ACL protected profile graph while (if you have to) placing 
a new mailto: or acct: URI in your SAN. Or put a fake email address and 
a real HTTP scheme URI in your SAN.  For the ultra paranoid, make a 
sub-property of owl:sameAs in your graph defined in an ontology that's 
ACL protected which then locks down inference based entailments etc..

Bottom line, the best solution I know of to the problem boils down to 
what many of us already understand about the combined prowess of: 
de-referencable URIs as an entity denotation mechanism, Linked Data 
based structured data representation, RDF data model (due to its 
explicit entity relationship semantics), and first-order logic as the 
overriding conceptual schema.

-- 

Regards,

Kingsley Idehen	
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
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Twitter/Identi.ca handle: @kidehen
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Received on Friday, 5 October 2012 21:16:05 UTC

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