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Physical Covid certificates are also not secure at all. They are easy to copy or fake. Any scheme which simply puts a cryptographic number on a some Physical

Physical Covid certificates are also not secure at all. They are easy to copy or fake. Any scheme which simply puts a cryptographic number on a some Physical card - or behind a regular QR is not secure. A simple photocopy will work just as well as the original. Not to mention Photoshop. But there is actually a new way to make physical things - like printed Covid vaccination cards - provably unique and authentic. Much more powerful than holograms and also much more secure, unclonable and authenticatable. Take a look at Blocktag (blocktag dot com) - Next gen QR codes that anyone can print, yet cannot be counterfeited. And of course linked to blockchain and ready for physical NFTs too.

heinrich5991 5y ago
The QR codes in Germany include your name and a digital signature. You can photocopy them, but the photocopy doesn't work for another person (if the venues would actually ask for your ID).
- Jenda_ 5y ago
  There is another problem even after asking for your ID - how can they verify it's you (based on the photo on the ID) when you have a face mask?
  - sofixa 5y ago
    They ask you to take it down momentarily to check your face. Come on now, a kid could have thought of that and it has been used for months ( just go to an airport or whatever).
jazzyjackson 5y ago
usa has a real problem with this, afaik there is no way to get a duplicate/back up of your hard copy vaccination record. so i’m supposed to carry a piece of paper with me, and not lose it, i guess that’s what makes it a passport. meanwhile ime most places with vaccine requirement accept a photo on my cell phone - not exactly cryptographically signed stuff over here.
- josephcsible 5y ago
  You can get a real passport replaced, though.
sschueller 5y ago
Here is Switzerland and EU your name is encoded in the signed qr code. If you photocopy a pass your name won't match and everywhere you go you must show ID with the pass. For places that are 3G you have the option in the app to not disclose your vaccination status in the code. So the scanning entity will know ow if you have one of the 3 possible requirements. Vaccinated, recovered or tested.

heinrich5991 5y ago

The QR codes in Germany include your name and a digital signature. You can photocopy them, but the photocopy doesn't work for another person (if the venues would actually ask for your ID).

Jenda_ 5y ago
There is another problem even after asking for your ID - how can they verify it's you (based on the photo on the ID) when you have a face mask?
- sofixa 5y ago
  They ask you to take it down momentarily to check your face. Come on now, a kid could have thought of that and it has been used for months ( just go to an airport or whatever).

jazzyjackson 5y ago

usa has a real problem with this, afaik there is no way to get a duplicate/back up of your hard copy vaccination record. so i’m supposed to carry a piece of paper with me, and not lose it, i guess that’s what makes it a passport. meanwhile ime most places with vaccine requirement accept a photo on my cell phone - not exactly cryptographically signed stuff over here.

josephcsible 5y ago
You can get a real passport replaced, though.

sschueller 5y ago

Here is Switzerland and EU your name is encoded in the signed qr code. If you photocopy a pass your name won't match and everywhere you go you must show ID with the pass. For places that are 3G you have the option in the app to not disclose your vaccination status in the code. So the scanning entity will know ow if you have one of the 3 possible requirements. Vaccinated, recovered or tested.