[chbot] My Vaccine Pass QR code - too small to read?

Paul Davey plmdvy at gmail.com
Sat Nov 27 13:10:53 GMT 2021

If you desire the knowledge of the contents look here:

It's a variously encoded CBOR blob with the same info as printed on
the pass (name and DOB, valid from and expirey dates) and a note of
who issued it and a signature that can be verified with the published
private key associated with that issuer.

On Sun, Nov 28, 2021 at 12:08 AM <chris at trash.co.nz> wrote:
> Hmmm,
> Printed at the normal size on an inkjet my iPhone and android can both
> scan it, although the default apps don't know what to do with "NZCP:"
> and the long string of random text which I guess is a hash of the rest
> of the data on the doc.
> The iPhone says 'no usable data' but that's after it successfully reads
> it, that's not a failed read.
> On 2021-11-27 18:13, Robin Gilks wrote:
> > Has anyone else downloaded their pass? Got mine but after printing the
> > QR code is only about 23mm square and it's a much higher density than
> > say the scan posters that shops have. As far as I can see it would
> > need to be at least 200mm square for the code to be read, as the size
> > of the elements of the code are of the same order as the pixel density
> > of my laser printer.
> >
> > Even 500% mag on a pdf reader and my phone (iPhoneX) can't decode it.
> >
> > Looks like a fail to me!
> >
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