[radicalbyte]

We are using IDEMIX to enable the DCC and COVID testing to be used all over the country. This allows us to only disclose a tiny amount of information - in many cases just one of your initials an either your month or day of birth - whilst proving yourself to be low-risk for COVID.

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].

[Mediterraneo10]

While the technology you are developing may allow that proof of COVID status, as the OP mentions, it is questionable if it will actually be used broadly in many countries. When countries have already reopened their hospitality sectors to all regardless of status, then they may be loathe to begin requiring COVID proof. Nor do hospitality staff necessarily want to given the duty of checking statuses.

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.

[radicalbyte]

It's more about "nudging" people towards getting vaccinated from my stand point. That's how we get through this pandemic.

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.