Not to detract from your overall point - because it's a great question - but I feel that calling this system "forgery proof" only tells half the story. Presuma

Not to detract from your overall point - because it's a great question - but I feel that calling this system "forgery proof" only tells half the story. Presumably public-key cryptography is how these certificates are signed and verified, which is essential for sure. But, a human is still required to verify that the information in the certificate matches some other ID, which could be easily forged. Drivers licenses and student ID cards are well known examples of such. I think it's great that the system was designed to be privacy respecting. However with a bit of skepticism I raise the question - will this system stop anyone besides the most unmotivated of forgers? Perhaps it's still a win, but I think it's a question that deserves pondering. > Besides the person’s first and last names, date of birth and a certificate number, the COVID certificate contains details of their COVID-19 vaccination, recovery, or negative PCR or rapid antigen test. > Thanks to the electronic signature of the Swiss Confederation, this makes the COVID certificate forgery-proof and guarantees that it is genuine. > the COVID Certificate Check app shows the person doing the check the name and date of birth of the certificate holder and whether the COVID certificate is valid. > The person doing the check must then compare the name and date of birth with an ID document (e.g. passport, ID card, driving licence, residence permit, student ID card or SwissPass) to make sure that the certificate was issued for this person.