When I was in Denmark I was shocked how many cameras there were, everywhere. I mean not just in the city, but everywhere on the countrywide.
I've lived in Denmark for decades. The only cameras I see are basically surveillance cameras in stores etc and speed cameras. I see more cameras in most other countries I go to.
We have nothing compared to fx. London.
Where did you see cameras?
Denmark is one of those weird countries where its illegal to have your map software tell you where the speed cameras are.
That's not correct. You can even buy gadgets for this in many stores.
But they do need to suspect it.
If they find an encrypted blob, ask for the decryption key, they decrypt the data and analyse the decrypted data, then they may not suspect that a different decryption key will reveal a different set of data.