2021-05-19 Paper Based Credentials Drafting Group Meeting Notes

Attendees

• David Janes
• Dan Bachenheimer
• Brent Zundel
• Rebecca Distler
• Vitor Pamplona
• Alex Metcalf
• Trev Harmon
• Viky Manalia
• Sankar Shan
• Don Branson
• Alex Fryer
• Justin Dossey
• Kaliya Young
• Bart Suchies

Agenda Items

Presentations

Recording 

Topic: Good Health Pass - Paper Credentials
Start Time : May 19, 2021 10:59 AM

Meeting Recording:
https://zoom.us/rec/share/uxK_JRlpVqLsg9fbXLpCQZwWaFBxestjIvNrzG6CEtE2UrJKXfWXwSqNXmKI-lXp.L41iTQ7Okvqb2OId

Notes

1. Welcome and Linux Foundation antitrust policy

2. Sync w/ Credentials Group

• Creds group recommending two signatures; passes are already minimized and constrained to a particular context, they could be issued directly (a use case that has been brought up as necessary for some players)
• BBS+ signature from issuer is different than BBS+ signature presented to verifier; if pass coming from directly from issuer, can they issue it so verifier can verify it?
• Have not yet recommended how to store BBS+ in any format other than digital  
• Should there be a transformation from paper back to digital (what is resulting thing)?
  • Digital representation of final pass (couldn't create a full BBS+ credential from paper version)
  • Paper creds encoding in nuts and bolts; get something digital and convert it to paper, when paper scanned it converts to digital 
  • Distinction between passes and credentials; QR codes for both?
  • ACTION: Creds group to take problem statement 7 and make recommendations for credentials and passes that talk about the transformation between the two and how to use safely; add note about if you have paper version of BBS+ credential you wouldn't share that directly it would need to be derived into a pass

3. Draft Finalization 

• Review of new intro & background 
• Review of comments (in draft)
• Discussion on minimization functions 
  • Size of QR code limit

4. Topic C 

5. Wrap up 

• Next steps

Action Items

1. TBC