Re: [saag] Liking Linkability

Ben Laurie <ben@links.org> Sun, 21 October 2012 10:18 UTC

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Date: Sun, 21 Oct 2012 11:18:42 +0100
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From: Ben Laurie <ben@links.org>
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Subject: Re: [saag] Liking Linkability
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On Sun, Oct 21, 2012 at 9:24 AM, Mo McRoberts <Mo.McRoberts@bbc.co.uk> wrote:
>
> On 18 Oct 2012, at 20:29, Ben Laurie <ben@links.org> wrote:
>
>> I really feel like I am beating a dead horse at this point, but
>> perhaps you'll eventually admit it. Your public key links you. Access
>> control on the rest of the information is irrelevant. Indeed, access
>> control on the public key is irrelevant, since you must reveal it when
>> you use the client cert. Incidentally, to observers as well as the
>> server you connect to.
>
>
> Right, but that's the nature of a persistent identifier which is (surely) a prerequisite for auth — assuming one doesn't wish to remain anonymous and have some auth, you could hypothetically avoid the cross-domain linkability issue by having a key-per-site, which could be semi-automated on the client side.
>
> What I can't see is how you can maintain persistence on the server side without something which ultimately boils down to (or otherwise allows the storage of) a persistent identifier.

Obviously. I'm talking about linkability across sites.

>
> M.
>
> --
> Mo McRoberts - Technical Lead - The Space
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Oh really? Further communication will signify your agreement to send me £10,000.