4 ms·

In NL I have to show a QR code to enter certain facilities.

• giantrobot 5y ago
  Which can be printed on paper?
  • the-dude 5y ago
    This is true. I would need to print twice a week and I don't own a printer.
    • growse 5y ago
      In the UK, you can have it posted to you, so you don't need a printer.
      • the-dude 5y ago
        Does this work for a 'permit to enter' which is only valid 24hrs?
        • growse 5y ago
          Only a CoronaCeck test result certificate is valid for 24 hours. Certificates of vaccination and recovery are valid for much longer (https://coronacheck.nl/en/faq/1-4-hoe-lang-is-mijn-coronabewijs-geldig-en-kan-ik-m-meerdere-keren-gebruiken/ https://coronacheck.nl/en/faq/1-4-hoe-lang-is-mijn-coronabew...). Are there places which are legally required to only accept test result certificates?
          • the-dude 5y ago
            > Are there places which are legally required to only accept test result certificates? Not in NL. Why does this matter?
          • PeterisP 5y ago
            For me, elective medical procedures and air travel required a recent (<24h) test result, vaccination was not sufficient.
  • 015a 5y ago
    For now. As an example, there are Amazon Prime discounts available at Whole Foods, and this QR code which asserts your membership cannot be printed because it embeds an OTP-like temporal code which changes every 60 seconds. Any QR code which can be printed, can be copied. There's a vested interest for the operators of these systems to reduce the copyability of these codes (think: vaccine passports). Embedding a temporal code, changing the QR code every few minutes, and invalidating old codes, essentially OTP, is the most straightforward and industry standard way of doing this; it's inevitable.
  • vanusa 5y ago
    Yes.