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Re: [saag] Liking Linkability

Robin Wilton <wilton@isoc.org> Tue, 23 October 2012 09:59 UTC

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From: Robin Wilton <wilton@isoc.org>
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Date: Tue, 23 Oct 2012 10:58:22 +0100
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References: <CCA5E789.2083A%Josh.Howlett@ja.net> <tslzk3jsjv8.fsf@mit.edu> <201210181904.PAA07773@Sparkle.Rodents-Montreal.ORG> <FB9E461D-CA62-4806-9599-054DF24C3FD9@bblfish.net> <CAG5KPzxGz+4MywjP4knfbDr2gyvqUZc1HEBXgtaDfYT+DPg5yg@mail.gmail.com> <8AB0C205-87AE-4F76-AA67-BC328E34AF5E@bblfish.net> <CABrd9SQghpi6_rVQKxYXZDtM5HwvE7Kq7SUw5zi41ZRd3y2h9A@mail.gmail.com> <4324B524-7140-49C0-8165-34830DD0F13B@bblfish.net> <CABrd9SQU1uYVaVPedokHxeYkT=759rkPFfimWK1Z8ATzo3yNFA@mail.gmail.com> <5083CCCF.2060407@webr3.org> <50842789.3080301@openlinksw.com> <50845268.4010509@webr3.org> <5084AC77.8030600@openlinksw.com> <50851512.9090803@webr3.org> <CABrd9SRNVLbWxifQAQ6iuX4qMeFmZVD6rO_q=L348G1UZzr9tg@mail.gmail.com> <50852726.9030102@openlinksw.com> <CABrd9SQ3KTqHq1hOfbLAU5hfgNyqCPK4u+ToEda+VtQ5S0utwA@mail.gmail.com> <5085360E.3080008@openlinksw.com> <50853CD8.8020005@w3.org> <5FB468E4-BDD3-4635-ACD0-A23540C08751@bblfish.net> <508562C2.1060905@w3.org> <F7EA147A-8A49-4627-8AA0-DD811CB9AC49@ bblfish.net> <CAG5KPzx673VKqg4=26-cvfeXZrBfK-XbURFj8eYx_mXVkko41A@mail.gmail.com>
To: Ben Laurie <ben@links.org>
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Cc: Halpin Harry <H.halplin@ed.ac.uk>, public-identity@w3.org, saag@ietf.org, "public-privacy@w3.org list" <public-privacy@w3.org>, public-webid@w3.org
Subject: Re: [saag] Liking Linkability
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Robin Wilton
Technical Outreach Director - Identity and Privacy
Internet Society

email: wilton@isoc.org
Phone: +44 705 005 2931
Twitter: @futureidentity




On 23 Oct 2012, at 09:44, Ben Laurie wrote:

<snip>

> 
> Not disagreeing with any of the above, but observing that:
> 
> a) There's no particular reason you could not have an email per site
> as well as a key per site.
> 
> b) Linkability it not, as you say, inherently bad. The problem occurs
> when you have (effectively) no choice about linkability.
> 


But it's very hard to use either of those mechanisms (separation through emails or keys) without giving some third party the ability to achieve total linkability. (In other words, both options remove effective choice).

Yrs.,
Robin

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