Does the app present the original QRCode?

[rumpelrausch]

...or does it modify it in any way befor presenting?
Background:
Why should people use this app if they could just take a photo of the original code?

[f11h]

Modifying the QR Code is not possible because this would break the signature and your certificate is invalid.
The core competence of this app is to scan verify and present your QR Code.

Yes, just storing the Code on your phone would have the same effect, but this is a more comfortable way. Also the risk of accidentally deleting the qr code is much higher when storing it in you gallery.

[rumpelrausch]

Thanks for your comment. I understand the QRCode is just passed through. Cross signing the cert again via the app wouldn't be safer anyway because the priv key would be part of the app.

I was just wondering because nobody seems to emphasize upon this; It looks as though people are urged to use an app even though it's not needed. Google shows a text snippet "Natürlich können Sie Ihren Digitalen Impfnachweis (Ausdruck oder Karte) auch kopieren oder gar abfotografieren." from the UBIRCH FAQ which seems to be removed now.

I don't agree upon the issue about loss of data. If people secure anything nowadays then it's their photo archive. It lives on forever in one or another cloud storage. Losing your photos means losing your life, that's Zeitgeist.

Anyway, my question is gladly answered and I'm closing the issue.