24G/Paper Based Credentials: Demo & Discussion

Paper Based Credentials: Demo & Discussion

Thursday 24G

Convener: Kyle Den Hartog, Preet Patel

Notes-taker(s): Preet Patel

Tags for the session - technology discussed/ideas considered:

Paper-based VC’s

Discussion notes, key understandings, outstanding questions, observations, and, if appropriate to this discussion: action items, next steps: 

Paper VC’s demo YouTube links:

youtu.be/EXvWxFjHvdY

youtu.be/fEBNGj377Vc

Second demo video using a different potential flow: https://www.youtube.com/watch?v=fEBNGj377Vc

Paper VC’s are hard to bring to parity with “digital VC’s”. The biggest issue is binding subject to holder and verifying that. There were also callouts on how do you prevent replication.

Traditionally, QR codes with the entire VC can be put onto a piece of paper. We proposed compression on those QR codes using CBOR-LD that reduces size of codes by 50%.

Alternative ways include adding VC’s into NFC chips and adding the NFC identifier as a claim to the VC preventing duplication. There is a cost overhead to this compared to paper but is a cost potentially worth occurring.