I took a quick look at this material and it's very hard to tell what the
actual privacy properties are:

"From a privacy perspective it is important that information that is
intended to remain private is handled appropriately. Maintaining the trust
of a verifiable claims ecosystem is important. Verifiable claims technology
defined by this group should not disclose private details of the
participants' identity or other sensitive information unless required for
operational purposes, by legal or jurisdictional rules, or when
deliberately consented to (e.g. as part of a request for information) by
the holder of the information. The design of any data model and syntax(es)
should guard against the unwanted leakage of such data."

But then when I read their architecture, I see:
"In order for Jane (Holder and Subject) to have information assigned to
her, she must get an identifier (Subject Identifier)."

Which makes it sound like this is going to leak a huge amount of tracking
information (effectively being an identity credential with attributes
attached). There has been a huge amount of work on using crypto to allow
you to prove specific claims without information leakage (cf.
https://www.microsoft.com/en-us/research/project/u-prove/), but this
doesn't seem to reflect any of it, rather opting for a much  more naive
design which is going to have much worse privacy properties. Is that really
the intent here?

-Ekr



On Fri, Dec 9, 2016 at 6:17 PM, L. David Baron <dba...@dbaron.org> wrote:

> The W3C is proposing a new charter for:
>
>   Verifiable Claims Working Group
>   https://www.w3.org/2017/vc/charter
>   https://lists.w3.org/Archives/Public/public-new-work/2016Dec/0003.html
>
> Mozilla has the opportunity to send comments or objections through
> Sunday, January 15, 2017.
>
> Please reply to this thread if you think there's something we should
> say as part of this charter review, or if you think we should
> support or oppose it.
>
> -David
>
> --
> 𝄞   L. David Baron                         http://dbaron.org/   𝄂
> 𝄢   Mozilla                          https://www.mozilla.org/   𝄂
>              Before I built a wall I'd ask to know
>              What I was walling in or walling out,
>              And to whom I was like to give offense.
>                - Robert Frost, Mending Wall (1914)
>
> _______________________________________________
> dev-platform mailing list
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>
>
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