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Re:What's Inside the EU Green Pass QR Code? by kawsper on Tuesday June 22, 2021 @06:58AM (#27590127)
I guess the certificate id is the id value you speak of.

It would be cool if the whole thing was signed by a government public key, then you could verify it offline.

Re:What's Inside the EU Green Pass QR Code? by fabian2k on Tuesday June 22, 2021 @07:01AM (#27590140)
It is. This is signed by the relevant health authority in each country as far as I understand. And the official apps for reading them can verify the signature offline.