Re: [Cbor] [COSE] European Digital Health Certificates (used in European Digital Green Certificates = Vaccination certs)

Michael Richardson <mcr+ietf@sandelman.ca> Sat, 12 June 2021 14:53 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Carsten Bormann <cabo@tzi.org>
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Comments: In-reply-to Carsten Bormann <cabo@tzi.org> message dated "Sat, 12 Jun 2021 14:48:01 +0200."
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Date: Sat, 12 Jun 2021 10:53:32 -0400
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Subject: Re: [Cbor] [COSE] European Digital Health Certificates (used in European Digital Green Certificates = Vaccination certs)
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Carsten Bormann <cabo@tzi.org> wrote:
    > Given that we occasionally look at how other SDOs use CBOR, COSE, etc.:

    > This week here in Europe, everybody talks about (Covid-19) “vaccination
    > certs”.

Thanks for posting this, as my email asking you to post this was sent ten
minutes ago :-)

    > It is also interesting that one of the problems they had was with
    > QR-Code integration.  E.g., the base45 ASCII-funneled encoding they are
    > using [2] contains percent characters, which unsurprisingly get mangled
    > by some smartphone QR-Code readers (who try to percent-decode them as
    > URIs).  (That would have been easily avoidable at zero additional cost
    > by using a base41-style encoding instead and using a less risky charset
    > subset.)

My understanding is that QRcode can use the entire 8-bits.  Am I wrong?

    > Maybe we can find someone to talk about practical aspects of DGC and
    > related efforts at one of the next CBOR interims...

Actually, I think it belongs as a IAB Tech plenary talk.

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