Yeah sure, how am I going to verify that, and what about my grandmother - I foresee many problems with doing that even as a programmer?

Your grandmother is a bouncer at a club ?

Your granny doesn’t need to verify this, these are used by employees of venues that want to limit access to their facilities to people who are either vaccinated or tested negatively.

I'm talking about people like me or my grandmother who want to verify that the guard at a club uses application that works fully offline and doesn't save any data - the QR code we're handing over contains our personal data and on top of that we're actually cryptographically verifying our whereabouts while using it, so I want to be absolutely sure the government doesn't have access directly without a court order. // yes I have had a real, serious problem with the government using data it got for other purposes against me for its own gain (I won the court, but it nearly destroyed my life and I'm still not where I was before and won't be for a long time).

I'm pretty sure the guard doesn't give a flying fuck about my personal information, just like the programmers - so how do I verify myself? Or am I to stay at home forever if I care about my privacy? The EU said very different things about these issues, is that forgotten now? The same goes for the other identity-related EU initiatives, where did all the talk about privacy go? Was it just propaganda, because it certainly seems so now, as there are so many so obvious loopholes it can't be an accident?

I don't know in what country you are, but mine (the Netherlands) has open-sourced everything around the corona-check apps, including backend, design, etc. on GitHub (https://github.com/minvws).

If you or your granny aren't good at reading code, you just have to trust that other members of the public who are would have made some noise in the media if something fishy was going on.

> Or am I to stay at home forever if I care about my privacy?

Yes -- just like you've always been, long before this pandemic. Every time you're out in public, you're out in public.