Seems complex for something that probably never going to see any real use.
Let's just say im very skeptical when it comes to IT-projects of the Swiss government. They regularly waste 100s of millions of CHF on stuff that simply doesn't work.
https://www.admin.ch/gov/en/start/documentation/media-releas...
This government has created a website where all certificate issuance and most other government-related business is fully electronic, I kind of can't believe they've done such a good job for such a backwards country. I'm amazed.
I was sceptical if they manage to actually deliver as fast as they promised especially as the EU guidelines and specs were were general/rough just a month ago.
The issue is that maintaining roadblocks along Schengen borders has incurred costs that countries don’t like to deal with long-term, and even with the roadblocks there have been a lot of gaps. I spent last summer cycling across Europe. I was fortunate in that all borders on my route were open, but I met a load of other cyclists who had crossed various Schengen borders illegally, because no one was checking traffic along some minor road through the fields.
So, for people with their own transportation, you might manage an entire European summer holiday without anyone ever checking your COVID certificate.
The Danish strategy is to test a lot of people and catch new cases early.
Requiring a green corona passport when entering various establishments where transmission can happen, is both a way to decrease the chance of transmission in these places, and to force more people to get tested, to hopefully catch asymptomatic people before they infect too many other people.
The reopening is possible because of previous actions, and its result will only be seen in a few months.
The DCC itself contains a lot of information so it shouldn't be directly used outside of border or police checks. I can - technically - be used as the basis for issuing of Verified Credentials by other parties. For example by airports - with the privacy protected by their privacy policy.
Whether the law allows that is another question.. and IANAL..
[Disclaimer: I work on the Dutch COVID apps and am deeply involved with Digital Green on EU level].
So if COVID status proof is required country-internally over the coming months, in many countries it will probably be used for mass events (e.g. the UNTOLD festival in Romania) but otherwise not.
I do strongly hope that the entire system will no longer be required come the end of 2021, or this time next year at the latest.
For the Exposure Notification apps the same thing applies.
Loads of venues and events in New York are requiring an Excelsior pass. Some will allow persons with out-of-state IDs in with paperwork inspection, but that’s a slower line.