I'm astonished by the lack of security of these cards. In Europe we have a digital COVID certificate which consist of a QR Code, easily verifiable and unfalsifi

I'm astonished by the lack of security of these cards. In Europe we have a digital COVID certificate which consist of a QR Code, easily verifiable and unfalsifiable. Anyone vaccinated can download a PDF version of this certificate with its social security number in France. I understand better why US citizen have trouble to travel in Europe since there is actually no proof that one is really vaccinated.