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The German and Swiss/Austrian apps are all open source (and I think all three also have reproducible builds, you can verify what you installed, I know this is t

by zaarn 5y ago

The German and Swiss/Austrian apps are all open source (and I think all three also have reproducible builds, you can verify what you installed, I know this is true of the official German apps involved). If you use a non-gov third party app that's on you I guess, not much from stopping you doing that since the QR code can be handled by any app. Otherwise, some personal data will be required, since the person checking your code (like a bouncer) must be able to verify that against your ID card.

dannyw 5y ago
If people are using apps, there are zero knowledge proofs that can be used here . The bouncer at the night club don't need to know how many doses you had or where you tested negative, as that has no impact by the legislation
- csunbird 5y ago
  The bouncer will also not check your ID as long as the barcode scanner says it is a valid certificate. He just does not care at all.
  - gillesjacobs 5y ago
    But it's trivially readable and collectable anyway.
- zaarn 5y ago
  It does actually, because not all vaccines require the same amount of doses and if you were infected, that's a completely different story too. Different cities also have different timespans after infection or dose after which you can start all the fun activities (and sometimes it matters per activity). For example, the nightclub might require 7 days after the last required dose for vaccination or 14 days after the last negative test after an infection, but other venues might only require 7 days after the last negative test and 14 days after the last dose. In addition to that, legislation may change, so your time limits and dosage limits now all change and future vaccinations might require more doses. Either way, the bouncer doesn't get to see any of this. They only see your name, check your ID if it's the same name (which they have to do anyway to check you're 16 for alcoholic beverages and curfew) and then wave you through. The apps I've seen in use by people who check the vaccination QR code only give you an OK or NOT OK signal, once you've setup the type of limits you have to obey.

by zaarn 5y ago

dannyw 5y ago

If people are using apps, there are zero knowledge proofs that can be used here . The bouncer at the night club don't need to know how many doses you had or where you tested negative, as that has no impact by the legislation

csunbird 5y ago
The bouncer will also not check your ID as long as the barcode scanner says it is a valid certificate. He just does not care at all.
- gillesjacobs 5y ago
  But it's trivially readable and collectable anyway.
zaarn 5y ago
It does actually, because not all vaccines require the same amount of doses and if you were infected, that's a completely different story too. Different cities also have different timespans after infection or dose after which you can start all the fun activities (and sometimes it matters per activity). For example, the nightclub might require 7 days after the last required dose for vaccination or 14 days after the last negative test after an infection, but other venues might only require 7 days after the last negative test and 14 days after the last dose. In addition to that, legislation may change, so your time limits and dosage limits now all change and future vaccinations might require more doses. Either way, the bouncer doesn't get to see any of this. They only see your name, check your ID if it's the same name (which they have to do anyway to check you're 16 for alcoholic beverages and curfew) and then wave you through. The apps I've seen in use by people who check the vaccination QR code only give you an OK or NOT OK signal, once you've setup the type of limits you have to obey.