W3C home > Mailing lists > Public > public-credentials@w3.org > August 2017

Re: Derived Attributes

From: Adam Sobieski <adamsobieski@hotmail.com>
Date: Wed, 23 Aug 2017 15:59:23 +0000
To: Lionel W. <lwolberg@gmail.com>, David Chadwick <D.W.Chadwick@kent.ac.uk>
CC: "public-credentials@w3.org" <public-credentials@w3.org>
Message-ID: <BN6PR01MB326682167568570FA1605092C5850@BN6PR01MB3266.prod.exchangelabs.com>
Thanks, I’ll look into those topics.

In the US, it’s looking like non-anonymous for legislator feedback is common (e.g. https://www.sanders.senate.gov/contact/comment).

At some point, we might be devising schema for credentials. With electoral districts, examples could show how cities, electoral districts or states could be provided as a commenter may be provided the option to remain anonymous. What does the group think about, at some point, a feedback form example, for elected officials’ websites? The Credential Handler API and related API’s may augment or replace portions of HTML forms.


Best regards,
Adam

From: Lionel W.<mailto:lwolberg@gmail.com>
Sent: ‎Wednesday‎, ‎August‎ ‎23‎, ‎2017 ‎9‎:‎03‎ ‎AM
To: David Chadwick<mailto:D.W.Chadwick@kent.ac.uk>
Cc: Adam Sobieski<mailto:adamsobieski@hotmail.com>, public-credentials@w3.org<mailto:public-credentials@w3.org>

Good stuff!

Any derived attribute that can be expressed as a mathematical formula (e.g. over 21) could be exposed privately.
I think the "selective disclosure" body of work deals well with such derived attributes.

On Wed, Aug 23, 2017 at 3:46 PM, David Chadwick <D.W.Chadwick@kent.ac.uk<mailto:D.W.Chadwick@kent.ac.uk>> wrote:


On 23/08/2017 13:19, Adam Sobieski wrote:
> David,
>
> Thanks. I saw an attribute predicate in an animation (I thought is was a
> derived attribute); I'm reading about attributes and predicates.
>
> For the example, it might make sense for an issuer to issue electoral
> districts onto a credential, if we desire the capability for anonymous
> feedback to elected officials and if the elected officials desire to
> know that a feedback-provider is from an electoral district.

Yes indeed. This would be a suitable credential for (in the UK case) a
local authority to issue to a resident

regards

David

>
>
> Best regards,
> Adam
>
> *From:* David Chadwick <mailto:D.W.Chadwick@kent.ac.uk<mailto:D.W.Chadwick@kent.ac.uk>>
> *Sent:* ‎Wednesday‎, ‎August‎ ‎23‎, ‎2017 ‎5‎:‎43‎ ‎AM
> *To:* public-credentials@w3.org<mailto:public-credentials@w3.org> <mailto:public-credentials@w3.org<mailto:public-credentials@w3.org>>
>
> Hi Adam
>
> since credentials are signed by issuers, then I do not believe a
> repository can implement a derived attribute, as a repository is not
> usually a trusted issuer. I suggest the issuer will issue this if
> requested to by the subject.
>
> regards
>
> David
>
> On 22/08/2017 21:51, Adam Sobieski wrote:
>> Credentials Community Group,
>>
>> I would like to ask about /derived attributes/ (e.g. over 21 which is
>> derived from birthdate and the current date), about how they are
>> implemented by credential repositories towards understanding whether
>> more complex derived attributes such as electoral districts might be
>> possible.
>>
>> Electoral districts (https://en.wikipedia.org/wiki/Electoral_district)
>> are dynamic regions. A digital wallet might inquire to a remote service
>> about how an address or location maps to an electoral district (e.g.
>> https://developers.google.com/civic-information/)
>>
>> Cities, states and electoral districts could be useful for government
>> feedback forms, recording audio messages for or writing letters to
>> Congresspeople via websites.
>>
>>
>> Best regards,
>> Adam Sobieski
>


Received on Wednesday, 23 August 2017 15:59:49 UTC

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