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

Re: [saag] Liking Linkability

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Sun, 21 Oct 2012 12:49:13 -0400
Message-ID: <50842789.3080301@openlinksw.com>
To: nathan@webr3.org
CC: Ben Laurie <benl@google.com>, Henry Story <henry.story@bblfish.net>, Ben Laurie <ben@links.org>, "public-philoweb@w3.org" <public-philoweb@w3.org>, "public-identity@w3.org" <public-identity@w3.org>, "public-privacy@w3.org" <public-privacy@w3.org>, Sam Hartman <hartmans-ietf@mit.edu>, "public-webid@w3.org" <public-webid@w3.org>, "saag@ietf.org" <saag@ietf.org>
On 10/21/12 6:22 AM, Nathan wrote:
> Ben Laurie wrote:
>> I'm getting quite tired of this: the point is, you cannot achieve
>> unlinkability with WebID except by using a different WebIDs. You made
>> the claim that ACLs on resources achieve unlinkability. This is
>> incorrect.
> You're 100% correct here Ben, and I'm unsure why it's so hard to convey!?
> If you use the same identifier for more than one request, subsequent 
> requests can be associated with the first request. An identifier here 
> is any identifying, stable, information - key parts and URIs.
> If the issue is only unlinkability across sites, then you just have a 
> keypair+uri per site. Or better, key-pair only, and that's associated 
> with an identifier for the agent behind the interface.
> You're correct that ACLs won't cut it.

What is the subject of unlinkability ?

I am sure you know that Henry and I are fundamentally referring to 
nebulous real-world entities such as "You" and "I". A composite key of: 
machine name, user agent name, and a document referrer links != said 
neboulus entity. Even further away in today world of multiple form 
factor devices that interact with the Internet and Web.

There is no precise mechanism for electronically nailing down nebulous 
entity "You" and "I". We aren't of the Internet or Web, so you can 
apprehend us in person. At best you can speculate that we are the 
subjects of tokens comprised of composite keys.

Unlinkability is subject to context fluidity and temporality once you 
add neboulus congnitive entites (not of the Web or Internet) to the 
equation. I believe you know this anyway :-)



Kingsley Idehen	
Founder & CEO
OpenLink Software
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Received on Sunday, 21 October 2012 16:49:37 UTC

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