Google translated to English: https://informatykzakladowy-pl.translate.goog/pierwszy-na-sw...
In Germany there is a discussion about only allowing approved photographers for passport photos and them sending the pictures directly to the authorities.
They are also very picky about the images here. When I got a new passport recently they investigated my images thoroughly with a magnifying glass and almost rejected them because of a few white pixels you could not see with the naked eye. Only when they saw that the pixels were different between multiple copies they conclude that it was probably a printer issue and found one copy that had almost none which they accepted.
I think authorities are well aware of the risk mentioned in the article here.
Very cool discussion and ideas. A true HN article. Need to translate though - unless of course you are Polish.
This reminds me of Nico Alm who was wearing a colander as hat on his picture of his passport. He argued that religious hats are allowed and he is a pastafari :-)
Why use the most often scanned and scrutinized item in your inventory? Why not a family photo in your wallet or a fake discount card?
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One thing to consider is that if you were to succeed in placing hidden text/image on an ID card, it may fail manual forgery checks at airports and police stations. One of the many ways IDs are checked is with different types of lighting[1]. This might have made this stand out as an artifact, which could result in an officer doubting its legitimacy.
[1] https://www.airport-suppliers.com/supplier-press-release/the...