Re: Working on Use Cases

Kerri,

This use case is also not far from what is done now.  Currently the Red Cross provides PDFs of a wallet and wall certificate that have a QR code which contains a URL to their website where the certificate number and last name can be entered in order to validate the certificate.  Using a VC could remove the “call home” aspect.

Yes, we could walk through these on Monday’s call.

Identities are definitely an area that need to be discussed.  For the issuer something like did:web would probably be useful to make it easy to verify that the credential was issued by the Red Cross.  In this case the subject does not have an id, a name property would be used with external validation (i.e. government issued id or a pre-existing relationship) to confirm who holds the qualification.

Yes, the Open Badge spec could be appropriate for this credential (and a similar use case was originally added there).  Doing so would allow some useful metadata such as “alignments”.

One question is how to encode the data for a QR code that holds a VC to keep the physical size small enough.  I punted that question with a precondition in the use case, but it would be good to find a set of widely used methods.


--
David Ward
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From: Kerri Lemoie <klemoie@concentricsky.com>
Date: Friday, October 22, 2021 at 10:09 AM
To: "Ward, David" <dward@pcgus.com>
Cc: "public-vc-edu@w3.org" <public-vc-edu@w3.org>
Subject: Re: Working on Use Cases

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Hi David,

Thanks for writing up and sharing these use cases. It’s one that’s very relatable. I also appreciate the use of the paper QR code because it adds the accessibility element that we often forget. If someone doesn’t have a mobile device of their own or a smart phone, using the paper certificate with the QR code allows them to have more verifiable proof than just the printed certificate on its own.

If you are open to it, it’d be great to walk through these on Mondays call.

A couple of questions that come to mind for me are:

What identity opportunities would be applicable to this VC?  (e.g. would it be a DID, URL  and how would it be verified?)

Do you think the Open Badges spec would be appropriate for this credential?

Thanks!

K.

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Kerri Lemoie, PhD
Director, Digital Credentials Research & Innovation
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On Oct 20, 2021, at 1:35 PM, Ward, David <dward@pcgus.com<mailto:dward@pcgus.com>> wrote:

Here are a couple use cases for evaluation.

These are not cases that I am actively working on but are based on recent experiences and discussions and are split into one for issuing and one for verification.

https://docs.google.com/document/d/1YxBMpOOBQ7Z2dAu4gd3W_D6d1BcgQ1jOBrDZYnKByb4/edit<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1YxBMpOOBQ7Z2dAu4gd3W_D6d1BcgQ1jOBrDZYnKByb4%2Fedit&data=04%7C01%7Cdward%40pcgus.com%7C16ba295f5099431597b808d9957ebeb1%7Cd9b110c34c254379b97ae248938cc17b%7C0%7C0%7C637705193876779045%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=pP4q03MhlcbpE9bJqRNu2iiNg25inwjFJdW7pku3mfw%3D&reserved=0>

https://docs.google.com/document/d/1Q3Vl_IjCkKorKl4kb_Qw_RD4E2Bwe3W42Lq2k6Xf1oc/edit<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1Q3Vl_IjCkKorKl4kb_Qw_RD4E2Bwe3W42Lq2k6Xf1oc%2Fedit&data=04%7C01%7Cdward%40pcgus.com%7C16ba295f5099431597b808d9957ebeb1%7Cd9b110c34c254379b97ae248938cc17b%7C0%7C0%7C637705193876779045%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=RaO%2F1juTB9Vb5xZ6Vuc8owYd9cfPUc3IBaT7zKrGnao%3D&reserved=0>


David
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From: Kerri Lemoie <klemoie@concentricsky.com<mailto:klemoie@concentricsky.com>>
Date: Tuesday, October 19, 2021 at 3:13 PM
To: "public-vc-edu@w3.org<mailto:public-vc-edu@w3.org>" <public-vc-edu@w3.org<mailto:public-vc-edu@w3.org>>
Subject: Working on Use Cases
Resent-From: <public-vc-edu@w3.org<mailto:public-vc-edu@w3.org>>
Resent-Date: Tuesday, October 19, 2021 at 3:13 PM

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Hello all,

For the next few weeks, we are going be focusing on writing and evaluating VC use cases in education, training, and achievements. We need use cases to guide us in this work.

In Monday’s call, we reviewed this use case template that is similar in structure to the one being used in other networks including the T3 Innovation Network.


Template: https://docs.google.com/document/d/1QcPTXUuhcJdQFPcj0F31MVg8QTGtOsSx93E7D6L4ZSI/edit?usp=sharing<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1QcPTXUuhcJdQFPcj0F31MVg8QTGtOsSx93E7D6L4ZSI%2Fedit%3Fusp%3Dsharing&data=04%7C01%7Cdward%40pcgus.com%7C16ba295f5099431597b808d9957ebeb1%7Cd9b110c34c254379b97ae248938cc17b%7C0%7C0%7C637705193876789001%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=qhr485GL%2FVgqgNL%2BHbhqJO7iqPUkv0gM04jJv9uMJUU%3D&reserved=0>


It includes an example that I’m working on about a high school student, Open Badges & college applications:

https://docs.google.com/document/d/10Sj4FcbxkbUIC2yVv_XKF-6U6zDzwdIE1l83CAiP2JQ/edit<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F10Sj4FcbxkbUIC2yVv_XKF-6U6zDzwdIE1l83CAiP2JQ%2Fedit&data=04%7C01%7Cdward%40pcgus.com%7C16ba295f5099431597b808d9957ebeb1%7Cd9b110c34c254379b97ae248938cc17b%7C0%7C0%7C637705193876789001%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=WBlP6fkVWSIUsPWoaO8gmIKJDhusl%2FQ47CGTzaFu8P4%3D&reserved=0>


Marty Reed has also used a similar template for two use cases that’s organization is working on:

https://docs.google.com/document/d/1Yli0Zt_D6RXSMV3B3VyYeVf4x9BE54WFZvV1BlD7m6s/edit<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1Yli0Zt_D6RXSMV3B3VyYeVf4x9BE54WFZvV1BlD7m6s%2Fedit&data=04%7C01%7Cdward%40pcgus.com%7C16ba295f5099431597b808d9957ebeb1%7Cd9b110c34c254379b97ae248938cc17b%7C0%7C0%7C637705193876789001%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=E1gYY1DaRUKK8mLuzXXVM8x3rnWFpIHmGd9kgPZZ9Ec%3D&reserved=0>

https://docs.google.com/document/d/1WH9IH6SFy0meIIA1x-HCK_YPbKb_XhIbulPQN5yeUlQ/edit<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1WH9IH6SFy0meIIA1x-HCK_YPbKb_XhIbulPQN5yeUlQ%2Fedit&data=04%7C01%7Cdward%40pcgus.com%7C16ba295f5099431597b808d9957ebeb1%7Cd9b110c34c254379b97ae248938cc17b%7C0%7C0%7C637705193876798958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=xQQp9nip56s%2Fco9q4sqvZjauZcO0ywQuK%2BSXQChFb5U%3D&reserved=0>


Please make a copy of the template to write your use cases. It will be helpful if you email your use case here so that we can all get more familiar with what we’re facing.

Also, feel free to reply to this email with discussion & questions about the template.


In next Monday’s call, we’ll review the content together.

Thanks,

Kerri




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Kerri Lemoie, PhD
Director, Digital Credentials Research & Innovation
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