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Re: VC Evidence Discussion

From: Phillip D. Long <phil@rhzconsulting.com>
Date: Thu, 7 Apr 2022 14:27:16 -0400
Message-Id: <2B6B29AB-9A7E-4A12-9B62-14345FF18832@rhzconsulting.com>
Cc: "W3C Credentials CG (Public List)" <public-credentials@w3.org>, public-vc-edu@w3.org
To: Kerri Lemoie <klemoie@concentricsky.com>
Dear Kerri: my hope is that we can use a modified version of the second approach you’ve listed, where the modification presents the evidence with same assurance that the credential provides of tamper evidence from the time the credential was issued. The goal is to extend this guarantee that the issued achievement credential was made based on the evidence cited and available at the it was issued. 

There are a number of ways to do this including, for example, using an anchoredResource property used by hashlinks, or a CID pointer used by Cermamic Networks to their IPFS-LD storage environment, etc. 

The point is the evidence should possess the same characteristic authenticity and promise of tamper evidence as the achievement it is being used to support. 

Cheers,
 Phil

Phillip Long, Ph.D.
RHz Consulting, LLC.
Inquire-Listen-Design-Prototype-Analyze-Repeat
e:phil@rhzconsulting.com
LinkedIn:http://www.linkedin.com/in/longpd/ 
—
T3 Innovation Network, LER Network Facilitator
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> On Apr 7, 2022, at 1:03 PM, Kerri Lemoie <klemoie@concentricsky.com> wrote:
> 
> Hello all,
> 
> I’m seeking some input on VC evidence. This is a topic relevant for VC-EDU because education data specifications like Open Badges and CLR may contain an evidence property to support the achievement. This evidence could be a test score, a link to an image, video, and/or web page, etc. that demonstrates competency or participation. These specs are working towards aligning with VCs and it was originally thought that this type of evidence would be included as part of the credentialSubject if it existed.
> 
> This would look something like this:
> 
> https://json.link/21SpTf0rC4 <https://json.link/21SpTf0rC4>
> 
> But since VCs already have an evidence property that allows for an array of evidence, it seems to make sense to use that property instead of using a separate property like the one demonstrated above. The rationalization is that VC evidence could be an array that supports what is needed for a credentialSubject to offer to support the verifiability of a VC such as a student id or it could also support the achievement that is being claimed as discussed above. This would look more like:
> 
> https://json.link/0gqe5D1U4K <https://json.link/0gqe5D1U4K>
> 
> Can you share your thoughts on this second approach? Do you think the VC.evidence support the achievement evidence too? 
> 
> Thanks!
> 
> Kerri
> 
> 
> 
> --------
> Kerri Lemoie, PhD
> Director, Digital Credentials Research & Innovation
> badgr.com <https://info.badgr.com/> | concentricsky.com <https://concentricsky.com/>
> she/her/hers
> 
> 
> 
> 
> 
> 


Received on Thursday, 7 April 2022 18:27:31 UTC

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