Daniel Feygin <[EMAIL PROTECTED]> Fri, 9 Nov 2007 13:58:46
>Sounds fine in theory, but where is the assurance that mbox_sha1sum is
>derived from a verified email address? Being public data, you can take
>this value from any FOAF instance you need and pretend to be that
>person to a third-party app within a controlled container. Is there
>anything that would prevent impersonation like that?

Not much of anything really. However in real life you get layers of 
proof and trust built up. I trust John Doe on site A where they say they 
have Skype ID JD. On Site B somebody says they are John Doe and also 
says they have Skype ID JD. And so on.

Then there's the point that most SNs require you to verify your email 
address and it's that which is then used to generate the hash. Do on 
that on three sites which then generate the same hash and there's a good 
chance that the person is the same.

No it's not perfect. Is it good enough? Probably.

-- 
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